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KCM55WR7YA476MH01L

KCM55WR7YA476MH01L

  • 厂商:

    MURATA-PS(村田)

  • 封装:

    CAP_6.1X5.1MM_SM

  • 描述:

    贴片电容(MLCC) CAP_6.1X5.1MM_SM 47µF ±20% 35V X7R

  • 数据手册
  • 价格&库存
KCM55WR7YA476MH01L 数据手册
Reference Specification Metal Terminal Type Multilayer Ceramic Capacitors for Automotive in accordance with AEC-Q200 ( KCM55 Series [Rat. Vol.: DC25V to DC100V] ) Product specifications in this catalog are as of Dec. 2017, and are subject to change or obsolescence without notice. Please consult the approval sheet before ordering.Please read rating and Cautions first. Reference only Caution ■Storage and Operation Conditions 1. The performance of chip monolithic ceramic capacitors may be affected by the storage conditions. 1-1. Store the capacitors in the following conditions:Room Temperature of +5°C to +40°C and a Relative Humidity of 20% to 70%. (1) Sunlight, dust, rapid temperature changes, corrosive gas atmosphere, or high temperature and humidity conditions during storage may affect solderability and packaging performance. Therefore, please maintain the storage temperature and humidity. Use the product within six months, as prolonged storage may cause oxidation of the electrodes. (2) Please confirm solderability before using after six months. Store the capacitors without opening the original bag. Even if the storage period is short, do not exceed the specified atmospheric conditions. 1-2. Corrosive gas can react with the termination(external) electrodes or lead wires of capacitors, and result in poor solderability. Do not store the capacitors in an atmosphere consisting of corrosive gas (e.g., hydrogen sulfide, sulfur dioxide, chlorine, ammonia gas, etc.). 1-3. Due to moisture condensation caused by rapid humidity changes, or the photochemical change caused by direct sunlight on the terminal electrodes and/or the resin/epoxy coatings, the solderability and electrical performance may deteriorate. Do not store capacitors under direct sunlight or in high humidity conditions. ■Rating 1. Temperature Dependent Characteristics 1. The electrical characteristics of a capacitor can change with temperature. 1-1. For capacitors having larger temperature dependency, the capacitance may change with temperature changes. The following actions are recommended in order to ensure suitable capacitance values. (1) Select a suitable capacitance for the operating temperature range. (2) The capacitance may change within the rated temperature. When you use a high dielectric constant type capacitor in a circuit that needs a tight (narrow) capacitance tolerance (e.g., a time-constant circuit), please carefully consider the temperature characteristics, and carefully confirm the various characteristics in actual use conditions and the actual system. 2. Measurement of Capacitance 1. Measure capacitance with the voltage and frequency specified in the product specifications. 1-1. The output voltage of the measuring equipment may decrease occasionally when capacitance is high. Please confirm whether a prescribed measured voltage is impressed to the capacitor. 1-2. The capacitance values of high dielectric constant type capacitors change depending on the AC voltage applied. Please consider the AC voltage characteristics when selecting a capacitor to be used in an AC circuit. 3. Applied Voltage 1. Do not apply a voltage to the capacitor that exceeds the rated voltage as called out in the specifications. 1-1. Applied voltage between the terminals of a capacitor shall be less than or equal to the rated voltage. (1) When AC voltage is superimposed on DC voltage, the zero-to-peak voltage shall not exceed the rated DC voltage. When AC voltage or pulse voltage is applied, the peak-to-peak voltage shall not exceed the rated DC voltage. (2) Abnormal voltages (surge voltage, static electricity, pulse voltage, etc.) shall not exceed the rated DC voltage. Typical Voltage Applied to the DC Capacitor DC Voltage DC Voltage+AC E AC Voltage E E Pulse Voltage 0 E 0 0 0 (E: Maximum possible applied voltage.) 1-2. Influence of over voltage Over voltage that is applied to the capacitor may result in an electrical short circuit caused by the breakdown of the internal dielectric layers. The time duration until breakdown depends on the applied voltage and the ambient temperature. 2. Use a safety standard certified capacitor in a power supply input circuit (AC filter), as it is also necessary to consider the withstand voltage and impulse withstand voltage defined for each device. EGKRC01 1 / 21 Reference only Caution 4. Type of Applied Voltage and Self-heating Temperature 1. Confirm the operating conditions to make sure that no large current is flowing into the capacitor due to the continuous application of an AC voltage or pulse voltage. When a DC rated voltage product is used in an AC voltage circuit or a pulse voltage circuit, the AC current or pulse current will flow into the capacitor; therefore check the self-heating condition. Please confirm the surface temperature of the capacitor so that the temperature remains within the upper limits of the operating temperature, including the rise in temperature due to self-heating. When the capacitor is used with a high-frequency voltage or pulse voltage, heat may be generated by dielectric loss. 1-1. The load should be contained to the level such that when measuring at atmospheric temperature of 25℃, the product's self-heating remains below 20℃ and the surface temperature of the capacitor in the actual circuit remains within the maximum operating temperature. 1-2. The load should be contained so that the self-heating of the capacitor body remains below 20°C, when measuring at an ambient temperature of 25°C. In addition, use a K thermocouple of φ0.1mm with less heat capacity when measuring, and measure in a condition where there is no effect from the radiant heat of other components or air flow caused by convection. Excessive generation of heat may cause deterioration of the characteristics and reliability of the capacitor. (Absolutely do not perform measurements while the cooling fan is operating, as an accurate measurement may not be performed.) 5. DC Voltage and AC Voltage Characteristics 1. The capacitance value of a high dielectric constant type capacitor changes depending on the DC voltage applied. Please consider the DC voltage characteristics when a capacitor is selected for use in a DC circuit. 1-1. The capacitance of ceramic capacitors may change sharply depending on the applied voltage (see figure). Please confirm the following in order to secure the capacitance. (1) Determine whether the capacitance change caused by the applied voltage is within the allowed range. (2) In the DC voltage characteristics, the rate of capacitance change becomes larger as voltage increases, even if the applied voltage is below the rated voltage. When a high dielectric constant type capacitor is used in a circuit that requires a tight (narrow) capacitance tolerance (e.g., a time constant circuit), please carefully consider the voltage characteristics, and confirm the various characteristics in actual operating conditions in an actual system. 2. The capacitance values of high dielectric constant type capacitors changes depending on the AC voltage applied. Please consider the AC voltage characteristics when selecting a capacitor to be used in an AC circuit. 6. Capacitance Aging 1. The high dielectric constant type capacitors have the characteristic in which the capacitance value decreases with the passage of time. When you use high dielectric constant type capacitors in a circuit that needs a tight (narrow) capacitance tolerance (e.g., a time-constant circuit), please carefully consider the characteristics of these capacitors, such as their aging, voltage, and temperature characteristics. In addition, check capacitors using your actual appliances at the intended environment and operating conditions. 7. Vibration and Shock 1. Please confirm the kind of vibration and/or shock, its condition, and any generation of resonance. Please mount the capacitor so as not to generate resonance, and do not allow any impact on the terminals. 2. Mechanical shock due to being dropped may cause damage or a crack in the dielectric material of the capacitor. Do not use a dropped capacitor because the quality and reliability may be deteriorated. Crack Floor 3. When printed circuit boards are piled up or handled, the corner of another printed circuit board should not be allowed to hit the capacitor, in order to avoid a crack or other damage to the capacitor. EGKRC01 2 / 21 Reference only Caution ■Soldering and Mounting 1. Mounting Position 1. Confirm the best mounting position and direction that minimizes the stress imposed on the capacitor during flexing or bending the printed circuit board. 1-1. Choose a mounting position that minimizes the stress imposed on the chip during flexing or bending of the board. [Component Direction] Locate chip horizontal to the direction in which stress acts. [Chip Mounting Close to Board Separation Point] It is effective to implement the following measures, to reduce stress in separating the board. It is best to implement all of the following three measures; however, implement as many measures as possible to reduce stress. C Contents of Measures Stress Level (1) Turn the mounting direction of the component parallel A>D (1) to the board separation surface. (2) Add slits in the board separation part. A>B D A (3) Keep the mounting position of the component away Slit A>C (3) from the board separation surface. [Mounting Capacitors Near Screw Holes] When a capacitor is mounted near a screw hole, it may be affected by the board deflection that occurs during the tightening of the screw. Mount the capacitor in a position as far away from the screw holes as possible. Perforation Screw Hole B Recommended 2. 1. 2. 3. 4. 5. 6. 7. Information before Mounting Do not re-use capacitors that were removed from the equipment. Confirm capacitance characteristics under actual applied voltage. Confirm the mechanical stress under actual process and equipment use. Confirm the rated capacitance, rated voltage and other electrical characteristics before assembly. Prior to use, confirm the solderability of capacitors that were in long-term storage. Prior to measuring capacitance, carry out a heat treatment for capacitors that were in long-term storage. The use of Sn-Zn based solder will deteriorate the reliability of the MLCC. Please contact our sales representative or product engineers on the use of Sn-Zn based solder in advance. 8. We have also produced a DVD which shows a summary of our opinions, regarding the precautions for mounting. Please contact our sales representative to request the DVD. 3. Maintenance of the Mounting (pick and place) Machine 1. Make sure that the following excessive forces are not applied to the capacitors. 1-1. In mounting the capacitors on the printed circuit board, any bending force against them shall be kept to a minimum to prevent them from any bending damage or cracking. Please take into account the following precautions and recommendations for use in your process. (1) Adjust the lowest position of the pickup nozzle so as not to bend the printed circuit board. (2) Adjust the nozzle pressure within a static load of 1N to 3N during mounting. EGKRC01 3 / 21 Reference only Caution 2. Dirt particles and dust accumulated between the suction nozzle and the cylinder inner wall prevent the nozzle from moving moving smoothly. This imposes greater force upon the chip during mounting, causing cracked chips. Also, the locating claw, when worn out, imposes uneven forces on the chip when positioning, causing cracked chips. The suction nozzle and the locating claw must be maintained, checked, and replaced periodically. 4-1. Reflow Soldering 1. When sudden heat is applied to the components, the mechanical strength of the components will decrease because a sudden temperature change causes deformation inside the components. In order to prevent mechanical damage to the components, preheating is required for both the components and the PCB. Preheating conditions are shown in table 1. It is required to keep the temperature differential between the solder and the components surface (ΔT) as small as possible. 2. Solderability of tin plating termination chips might be deteriorated when a low temperature soldering profile where the peak solder temperature is below the melting point of tin is used. Please confirm the solderability of tin plated termination chips before use. 3. When components are immersed in solvent after mounting, be sure to maintain the temperature difference (ΔT) between the component and the solvent within the range shown in table 1. [Standard Conditions for Reflow Soldering] Temperature (℃) Reflow Soldering Peak Temperature 220℃(200℃) 190℃(170℃) 170℃(150℃) 150℃(130℃) Gradual Cooling ΔT Preheating Time 60 to 120 seconds Temperature Incase of Lead Free Solder ( ): In case of Pb-Sn Solder Temperature (℃) Vapor Reflow Soldering Peak Temperature Table 1 Part Number K□□21 / K□□31 K□□55 30 to 60 seconds Temperature Differential ΔT≦190°C ΔT≦130°C 190℃(170℃) 170℃(150℃) 150℃(130℃) Gradual Cooling ΔT Preheating Recommended Conditions Pb-Sn Solder Peak Temperature 230 to 250°C Atmosphere Air Vapor Reflow Lead Free Solder 230 to 240°C 240 to 260°C Saturated vapor of inactive solvent Air or N2 Time 60 to 120 seconds 20 seconds max. [Allowable Reflow Soldering Temperature and Time] Soldering Temperature (℃) Reflow Pb-Sn Solder: Sn-37Pb Lead Free Solder: Sn-3.0Ag-0.5Cu 280 270 260 250 240 230 220 0 90 120 Soldering Time (sec.) In the case of repeated soldering, the accumulated soldering time must be within the range shown above. 4. Optimum Solder Amount for Reflow Soldering 4-1. If solder paste is excessive, solder between a chip and a metal terminal melts. This causes the chip to move and come off. 4-2. If solder paste is too little, it causes a lack of adhesive strength on the metal terminal and the capacitor comes off. 4-3. Please make sure that solder is smoothly applied higher than 0.3mm and lower than the level of the bottom of the chip. Inverting the PCB Make sure not to impose any abnormal mechanical shocks to the PCB. 4-2. Flow Soldering 1. Do not apply flow soldering. EGKRC01 4 / 21 30 60 0.3mm min. In section Reference only Caution 4-3. Correction of Soldered Portion 1. For the shape of the soldering iron tip, refer to the figure on the right. 2. Regarding the type of solder, use a wire diameter of φ0.5mm or less (rosin core wire solder). 3. Apply the tip of the soldering iron against the lower end of the metal terminal. (1) In order to prevent cracking caused by sudden heating of the ceramic device, do not touch the ceramic base directly. (2) In order to prevent deviations and dislocating of the chip, do not touch the junction of the chip and the metal terminal, and the metal portion on the outside directly. 4. The amount of solder for corrections by soldering iron, should be lower than the height of the lower side of the chip. Solder Amount In section 5. Washing Excessive ultrasonic oscillation during cleaning can cause the PCBs to resonate, resulting in cracked chips or broken solder joints. Take note not to vibrate PCBs. 6. Electrical Test on Printed Circuit Board 1. Confirm position of the backup pin or specific jig, when inspecting the electrical performance of a capacitor after mounting on the printed circuit board. 1-1. Avoid bending the printed circuit board by the pressure of a test-probe, etc. The thrusting force of the test probe can flex the PCB, resulting in cracked chips or open solder joints. Provide backup pins on the back side of the PCB to prevent warping or flexing. Install backup pins as close to the capacitor as possible. 1-2. Avoid vibration of the board by shock when a test-probe contacts a printed circuit board. [Not Recommended] [Recommended] Peeling Backup Pin Test-probe Test-probe 7. Printed Circuit Board Cropping 1. After mounting a capacitor on a printed circuit board, do not apply any stress to the capacitor that causes bending or twisting the board. 1-1. In cropping the board, the stress as shown at right may cause the capacitor to crack. Cracked capacitors may cause deterioration of the insulation resistance, and result in a short. Avoid this type of stress to a capacitor. [Bending] EGKRC01 [Twisting] 5 / 21 Reference only Caution 2. Check the cropping method for the printed circuit board in advance. 2-1. Printed circuit board cropping shall be carried out by using a jig or an apparatus (Disk separator, router type separator, etc.) to prevent the mechanical stress that can occur to the board. Board Separation Method Hand Separation Nipper Separation (1) Board Separation Jig Level of stress on board High Recommended × Notes Hand and nipper separation apply a high level of stress. Use another method. Board Separation Apparatus (2) Disk Separator (3) Router Type Separator Medium Medium Low △* △* ○ · Board handling · Board bending direction · Layout of capacitors · Board handling · Layout of slits · Design of V groove · Arrangement of blades · Controlling blade life Board handling * When a board separation jig or disk separator is used, if the following precautions are not observed, a large board deflection stress will occur and the capacitors may crack. Use router type separator if at all possible. (1) Example of a suitable jig [In the case of Single-side Mounting] An outline of the board separation jig is shown as follows. Recommended example: Stress on the component mounting position can be minimized by holding the portion close to the jig, and bend in the direction towards the side where the capacitors are mounted. Not recommended example: The risk of cracks occurring in the capacitors increases due to large stress being applied to the component mounting position, if the portion away from the jig is held and bent in the direction opposite the side where the capacitors are mounted. [Outline of Jig] Recommended Not Recommended [In the case of Double-sided Mounting] Since components are mounted on both sides of the board, the risk of cracks occurring can not be avoided with the above method. Therefore, implement the following measures to prevent stress from being applied to the components. (Measures) ① Consider introducing a router type separator. If it is difficult to introduce a router type separator, implement the following measures. (Refer to item 1. Mounting Position) ② Mount the components at a right angle to the board separation surface. ③ When mounting components near the board separation point, add slits in the separation position near the component. ④ Keep the mounting position of the components away from the board separation point. (2) Example of a Disk Separator An outline of a disk separator is shown as follows. As shown in the Principle of Operation, the top blade and bottom blade are aligned with the V-grooves on the printed circuit board to separate the board. In the following case, board deflection stress will be applied and cause cracks in the capacitors. ① When the adjustment of the top and bottom blades are misaligned, such as deviating in the top-bottom, left-right or front-rear directions ② The angle of the V groove is too low, depth of the V groove is too shallow, or the V groove is misaligned top-bottom IF V groove is too deep, it is possible to brake when you handle and carry it. Carefully design depth of the V groove with consideration about strength of material of the printed circuit board. [Outline of Machine] EGKRC01 [Principle of Operation] 6 / 21 [Cross-section Diagram] Reference only Caution Recommended Top Blade  Top Blade  Bottom Blade Example of Recommended V-groove Design Not Recommended Left-right Misalignment Top-bottom Misalignment Bottom Blade Left-right Misalignment Front-rear Misalignment Top Blade  Bottom Blade Not Recommended Low-Angle Depth too Shallow Top Blade  Bottom Blade Depth too Deep (3) Example of Router Type Separator The router type separator performs cutting by a router rotating at a high speed. Since the board does not bend in the cutting process, stress on the board can be suppressed during board separation. When attaching or removing boards to/from the router type separator, carefully handle the boards to prevent bending. [Outline Drawing] Router 8. Assembly 1. Handling If a board mounted with capacitors is held with one hand, the board may bend. Firmly hold the edges of the board with both hands when handling. If a board mounted with capacitors is dropped, cracks may occur in the capacitors. Do not use dropped boards, as there is a possibility that the quality of the capacitors may be impaired. 2. Attachment of Other Components 2-1. Mounting of Other Components Pay attention to the following items, when mounting other components on the back side of the board after capacitors have been mounted on the opposite side. When the bottom dead point of the suction nozzle is set too low, board deflection stress may be applied to the capacitors on the back side Suction Nozzle (bottom side), and cracks may occur in the capacitors. ・ After the board is straightened, set the bottom dead point of the nozzle on the upper surface of the board. ・ Periodically check and adjust the bottom dead point. 2-2. Inserting Components with Leads into Boards When inserting components (transformers, IC, etc.) into boards, bending the board may cause cracks in the capacitors or cracks in the solder. Pay attention to the following. ・ Increase the size of the holes to insert the leads, to reduce the stress on the board during insertion. ・ Fix the board with backup pins or a dedicated jig before Component with Leads insertion. ・ Support below the board so that the board does not bend. When using multiple backup pins on the board, periodically confirm that there is no difference in the height of each backup pin. EGKRC01 7 / 21 Reference only Caution 2-3. Attaching/Removing Sockets When the board itself is a connector, the board may bend when a socket is attached or removed. Plan the work so that the board does not bend when a socket is attached or removed. 2-4. Tightening Screws The board may be bent, when tightening screws, etc. during the attachment of the board to a shield or chassis. Pay attention to the following items before performing the work. ・ Plan the work to prevent the board from bending. ・ Use a torque screwdriver, to prevent over-tightening of the screws. ・ The board may bend after mounting by reflow soldering, etc. Please note, as stress may be applied to the chips by forcibly flattening the board when tightening the screws. Socket Screwdriver ■Other 1. Under Operation of Equipment 1-1. Do not touch a capacitor directly with bare hands during operation in order to avoid the danger of an electric shock. 1-2. Do not allow the terminals of a capacitor to come in contact with any conductive objects (short-circuit). Do not expose a capacitor to a conductive liquid, including any acid or alkali solutions. 1-3. Confirm the environment in which the equipment will operate is under the specified conditions. Do not use the equipment under the following environments. (1) Being spattered with water or oil. (2) Being exposed to direct sunlight. (3) Being exposed to ozone, ultraviolet rays, or radiation. (4) Being exposed to toxic gas (e.g., hydrogen sulfide, sulfur dioxide, chlorine, ammonia gas, etc.) (5) Any vibrations or mechanical shocks exceeding the specified limits. (6) Moisture condensing environments. 1-4. Use damp proof countermeasures if using under any conditions that can cause condensation. 2. Other 2-1. In an Emergency (1) If the equipment should generate smoke, fire, or smell, immediately turn off or unplug the equipment. If the equipment is not turned off or unplugged, the hazards may be worsened by supplying continuous power. (2) In this type of situation, do not allow face and hands to come in contact with the capacitor or burns may be caused by the capacitor's high temperature. 2-2. Disposal of Waste When capacitors are disposed of, they must be burned or buried by an industrial waste vendor with the appropriate licenses. 2-3. Circuit Design (1) Addition of Fail Safe Function Capacitors that are cracked by dropping or bending of the board may cause deterioration of the insulation resistance, and result in a short. If the circuit being used may cause an electrical shock, smoke or fire when a capacitor is shorted, be sure to install fail-safe functions, such as a fuse, to prevent secondary accidents. (2) Capacitors used to prevent electromagnetic interference in the primary AC side circuit, or as a connection/insulation, must be a safety standard certified product, or satisfy the contents stipulated in the Electrical Appliance and Material Safety Law. Install a fuse for each line in case of a short. (3) The KR3, KRM, KC3, KCM series are not safety standard certified products. 2-4. Remarks Failure to follow the cautions may result, worst case, in a short circuit and smoking when the product is used. The above notices are for standard applications and conditions. Contact us when the products are used in special mounting conditions. Select optimum conditions for operation as they determine the reliability of the product after assembly. The data herein are given in typical values, not guaranteed ratings. 3. Limitation of applications Please contact us before using our products for the applications listed below which require especially high reliability for the prevention of defects which might directly cause damage to the third party’s life, body or property. (1) Aircraft equipment (2) Aerospace equipment (3) Undersea equipment (4) Power plant control equipment (5) Medical equipment (6) Transportation equipment (vehicles, trains, ships, etc.) (7) Traffic signal equipment (8) Disaster prevention/crime prevention equipment (9) Data-processing equipment exerting influence on public (10) Application of similar complexity and/or reliability requirements to the applications listed in the above. EGKRC01 8 / 21 Reference only Notice ■Rating 1. Operating Temperature 1. The operating temperature limit depends on the capacitor. 1-1. Do not apply temperatures exceeding the upper operating temperature. It is necessary to select a capacitor with a suitable rated temperature that will cover the operating temperature range. It is also necessary to consider the temperature distribution in equipment and the seasonal temperature variable factor. 1-2. Consider the self-heating factor of the capacitor. The surface temperature of the capacitor shall be the upper operating temperature or less when including the self-heating factors. 2. Atmosphere Surroundings (gaseous and liquid) 1. Restriction on the operating environment of capacitors. 1-1. Capacitors, when used in the above, unsuitable, operating environments may deteriorate due to the corrosion of the terminations and the penetration of moisture into the capacitor. 1-2. The same phenomenon as the above may occur when the electrodes or terminals of the capacitor are subject to moisture condensation. 1-3. The deterioration of characteristics and insulation resistance due to the oxidization or corrosion of terminal electrodes may result in breakdown when the capacitor is exposed to corrosive or volatile gases or solvents for long periods of time. 3. Piezo-electric Phenomenon 1. When using high dielectric constant type capacitors in AC or pulse circuits, the capacitor itself vibrates at specific frequencies and noise may be generated. Moreover, when the mechanical vibration or shock is added to the capacitor, noise may occur. ■Soldering and Mounting 1. PCB Design 1. Notice for Pattern Forms 1-1. Unlike leaded components, chip components are susceptible to flexing stresses since they are mounted directly on the substrate. They are also more sensitive to mechanical and thermal stresses than leaded components. Excess solder fillet height can multiply these tresses and cause chip cracking. When designing substrates, take land patterns and dimensions into consideration to eliminate the possibility of excess solder fillet height. 1-2. There is a possibility of chip cracking caused by PCB expansion/contraction with heat, because stress on a chip is different depending on PCB material and structure. When the thermal expansion coefficient greatly differs between the board used for mounting and the chip, it will cause cracking of the chip due to the thermal expansion and contraction. When small size capacitors of 1005 size or less are mounted on a single-layered glass epoxy board, it will also cause cracking of the chip for the same reason. Pattern Forms Prohibited Chassis Solder(ground) Correct Solder Resist Placing Close to Chassis Electrode Pattern Placing of Chip Components and Leaded Components Placing of Leaded Components after Chip Component Lead Wire Solder Resist Soldering Iron Lead Wire Solder Resist Solder Resist Lateral Mounting EGKRC01 9 / 21 Reference only Notice 2. Land Dimensions 2-1. Chip capacitors can be cracked due to the stress of PCB bending, etc. if the land area is larger than needed and has an excess amount of solder. Please refer to the land dimensions in the following table for reflow soldering. Please confirm the suitable land dimension by evaluating of the actual SET / PCB. Part Number K□□21 K□□31 K□□55 Dimensions Chip (L×W) a b c 2.0×1.25 3.2×1.6 5.7×5.0 1.0 to 1.2 2.2 to 2.4 2.6 0.6 to 0.7 0.8 to 0.9 2.7 0.8 to 1.1 1.0 to 1.4 5.6 3. Board Design When designing the board, keep in mind that the amount of strain which occurs will increase depending on the size and material of the board. Relationship with amount of strain to the board thickness, length, width, etc.] ε= 3PL 2Ewh2 Relationship between load and strain P Y h L w ε:Strain on center of board (μst) L:Distance between supporting points (mm) w :Board width (mm) h :Board thickness (mm) E :Elastic modulus of board (N/m2=Pa) Y :Deflection (mm) P :Load (N) When the load is constant, the following relationship can be established. · As the distance between the supporting points (L) increases,the amount of strain also increases. →Reduce the distance between the supporting points. · As the elastic modulus (E) decreases, the amount of strain increases. →Increase the elastic modulus. · As the board width (w) decreases, the amount of strain increases. →Increase the width of the board. · As the board thickness (h) decreases, the amount of strain increases. →Increase the thickness of the board. Since the board thickness is squared, the effect on the amount of strain becomes even greater. 4. Washing 1. Please evaluate the capacitor using actual cleaning equipment and conditions to confirm the quality, and select the solvent for cleaning. 2. Unsuitable cleaning solvent may leave residual flux or other foreign substances, causing deterioration of electrical characteristics and the reliability of the capacitors. 3. Select the proper cleaning conditions. 3-1. Improper cleaning conditions (excessive or insufficient) may result in deterioration of the performance of the capacitors. 5. Coating 1. A crack may be cause in the capacitor due to the stress of the thermal contraction of the resin during curing process. The stress is affected by the amount of resin and curing contraction. Select a resin with low curing contraction. The difference in the thermal expansion coefficient between a coating resin or a molding resin and the capacitor may cause the destruction and deterioration of the capacitor such as a crack or peeling, and lead to the deterioration of insulation resistance or dielectric breakdown. Select a resin for which the thermal expansion coefficient is as close to that of the capacitor as possible. A silicone resin can be used as an under-coating to buffer against the stress. 2. Select a resin that is less hygroscopic. Using hygroscopic resins under high humidity conditions may cause the deterioration of the insulation resistance of a capacitor. An epoxy resin can be used as a less hygroscopic resin. EGKRC01 10 / 21 Reference only Notice ■Other 1. Transportation 1. The performance of a capacitor may be affected by the conditions during transportation. 1-1. The capacitors shall be protected against excessive temperature, humidity, and mechanical force during transportation. (1) Climatic condition ・ low air temperature : -40℃ ・ change of temperature air/air : -25℃/+25℃ ・ low air pressure : 30kPa ・ change of air pressure : 6kPa/min. (2) Mechanical condition Transportation shall be done in such a way that the boxes are not deformed and forced are not directly passed on to the inner packaging. 1-2. Do not apply excessive vibration, shock, or pressure to the capacitor. (1) When excessive mechanical shock or pressure is applied to a capacitor, chipping or cracking may occur in the ceramic body of the capacitor. (2) When the sharp edge of an air driver, a soldering iron, tweezers, a chassis, etc. impacts strongly on the surface of the capacitor, the capacitor may crack and short-circuit. 1-3. Do not use a capacitor to which excessive shock was applied by dropping, etc. A capacitor dropped accidentally during processing may be damaged. 2. Characteristics Evaluation in the Actual System 1. Evaluate the capacitor in the actual system, to confirm that there is no problem with the performance and specification values in a finished product before using. 2. Since a voltage dependency and temperature dependency exists in the capacitance of high dielectric type ceramic capacitors, the capacitance may change depending on the operating conditions in the actual system. Therefore, be sure to evaluate the various characteristics, such as the leakage current and noise absorptivity, which will affect the capacitance value of the capacitor. 3. In addition, voltages exceeding the predetermined surge may be applied to the capacitor by the inductance in the actual system. Evaluate the surge resistance in the actual system as required. Note 1. Please make sure that your product has been evaluated in view of your specifications with our product being mounted to your product. 2. You are requested not to use our product deviating from this specification. EGKRC01 11 / 21 Reference only 1. Application This specification is applied to Metal Terminal Type Multilayer Ceramic Capacitors KCM series in accordance with AEC-Q200 requirements used for Automotive Electronics equipment. 2. Rating 2-1. Operating temperature range -55 to +125°C 2-2. Part name configuration 55 W R7 2A 156 M H01 K ex.) KCM Series Chip Height Temperature Rated Capacitance Capacitance Individual Packing dimension dimension characteristic voltage tolerance specification style (LW) Chip dimension(LW) Code 55 Height dimension Code L Q T W Nominal Chip dimension (mm) L W 5.7 5.0 Dimension (mm) 2.8 3.7 4.8 6.4 Please refer to [Part number list] on the dimensions of metal terminal product. Temperature characteristic Code Temperature characteristic C7 X7S R7 X7R Please confirm detailed specification on [Specification and test methods]. Rated voltage Code 1E YA 1H 1J 2A Rated voltage DC25V DC35V DC50V DC63V DC100V Capacitance The first two digits denote significant figures ; the last digit denotes the multiplier of 10 in pF. ex.) In case 156. 15 x106 = 15000000pF(=15F) Capacitance tolerance Please refer to [Part number list]. Individual specification Murata’s control code Please refer to  Part number list . Packing style Code K Style 330mm reel Plastic taping ETKCM5502B 12 / 21 Reference only 3. Part number list Unit : mm T.C. DC Rated Cap. Volt. (F) (V) Cap. tol. (%) Dimension(mm) Customer Part Number Murata Part Number L W T e Pack Chip qty. type (pcs) X7R 25 15 ±10 KCM55LR71E156KH01K 6.1 5.3 2.8 1.2 ±0.4 ±0.2 ±0.2 ±0.2 1 2000 X7R 25 22 ±10 KCM55QR71E226KH01K 6.1 5.3 3.7 1.2 ±0.4 ±0.2 ±0.2 ±0.2 1 1000 X7R 25 33 ±10 KCM55QR71E336KH01K 6.1 5.3 3.7 1.2 ±0.4 ±0.2 ±0.2 ±0.2 1 1000 X7R 25 33 ±20 KCM55TR71E336MH01K 6.1 5.3 4.8 1.2 ±0.4 ±0.2 ±0.2 ±0.2 2 1000 X7R 25 47 ±20 KCM55WR71E476MH01K 6.1 5.3 6.4 1.2 ±0.4 ±0.2 ±0.3 ±0.2 2 500 X7R 25 68 ±20 KCM55WR71E686MH01K 6.1 5.3 6.4 1.2 ±0.4 ±0.2 ±0.3 ±0.2 2 500 X7S 25 47 ±10 KCM55QC71E476KH13K 6.1 5.3 3.7 1.2 ±0.5 ±0.2 ±0.2 ±0.2 1 1000 X7S 25 100 ±20 KCM55WC71E107MH13K 6.1 5.3 6.4 1.2 ±0.5 ±0.2 ±0.3 ±0.2 2 500 X7R 35 10 ±10 KCM55LR7YA106KH01K 6.1 5.3 2.8 1.2 ±0.4 ±0.2 ±0.2 ±0.2 1 2000 X7R 35 15 ±10 KCM55LR7YA156KH01K 6.1 5.3 2.8 1.2 ±0.4 ±0.2 ±0.2 ±0.2 1 2000 X7R 35 17 ±10 KCM55QR7YA176KH01K 6.1 5.3 3.7 1.2 ±0.4 ±0.2 ±0.2 ±0.2 1 1000 X7R 35 22 ±10 KCM55QR7YA226KH01K 6.1 5.3 3.7 1.2 ±0.4 ±0.2 ±0.2 ±0.2 1 1000 X7R 35 22 ±20 KCM55TR7YA226MH01K 6.1 5.3 4.8 1.2 ±0.4 ±0.2 ±0.2 ±0.2 2 1000 X7R 35 33 ±20 KCM55TR7YA336MH01K 6.1 5.3 4.8 1.2 ±0.4 ±0.2 ±0.2 ±0.2 2 1000 X7R 35 33 ±20 KCM55WR7YA336MH01K 6.1 5.3 6.4 1.2 ±0.4 ±0.2 ±0.3 ±0.2 2 500 X7R 35 47 ±20 KCM55WR7YA476MH01K 6.1 5.3 6.4 1.2 ±0.4 ±0.2 ±0.3 ±0.2 2 500 ETKCM5502B 13 / 21 Reference only Unit : mm DC Rated Cap. T.C. Volt. (F) (V) Cap. tol. (%) Dimension(mm) Customer Part Number Murata Part Number L W T e Pack Chip qty. type (pcs) X7R 50 4.7 ±10 KCM55LR71H475KH01K 6.1 5.3 2.8 1.2 ±0.4 ±0.2 ±0.2 ±0.2 1 2000 X7R 50 10 ±10 KCM55LR71H106KH01K 6.1 5.3 2.8 1.2 ±0.4 ±0.2 ±0.2 ± 0.2 1 2000 X7R 50 10 ±10 KCM55QR71H106KH01K 6.1 5.3 3.7 1.2 ±0.4 ±0.2 ±0.2 ± 0.2 1 1000 X7R 50 17 ±10 KCM55QR71H176KH01K 6.1 5.3 3.7 1.2 ±0.4 ±0.2 ±0.2 ±0.2 1 1000 X7R 50 22 ±20 KCM55TR71H226MH01K 6.1 5.3 4.8 1.2 ±0.4 ±0.2 ±0.2 ±0.2 2 1000 X7R 50 22 ±20 KCM55WR71H226MH01K 6.1 5.3 6.4 1.2 ±0.4 ±0.2 ±0.3 ±0.2 2 500 X7R 50 33 ±20 KCM55WR71H336MH01K 6.1 5.3 6.4 1.2 ±0.4 ±0.2 ±0.3 ±0.2 2 500 X7R 63 4.7 ±10 KCM55LR71J475KH01K 6.1 5.3 2.8 1.2 ±0.4 ±0.2 ±0.2 ±0.2 1 2000 X7R 63 10 ±10 KCM55QR71J106KH01K 6.1 5.3 3.7 1.2 ±0.4 ±0.2 ±0.2 ±0.2 1 1000 X7R 63 22 ±20 KCM55WR71J226MH01K 6.1 5.3 6.4 1.2 ±0.4 ±0.2 ±0.3 ±0.2 2 500 X7R 100 4.7 ±10 KCM55LR72A475KH01K 6.1 5.3 2.8 1.2 ±0.4 ±0.2 ±0.2 ±0.2 1 2000 X7R 100 6.8 ±10 KCM55QR72A685KH01K 6.1 5.3 3.7 1.2 ±0.4 ±0.2 ±0.2 ±0.2 1 1000 X7R 100 10 ±10 KCM55QR72A106KH01K 6.1 5.3 3.7 1.2 ±0.4 ±0.2 ±0.2 ±0.2 1 1000 X7R 100 10 ±20 KCM55TR72A106MH01K 6.1 5.3 4.8 1.2 ±0.4 ±0.2 ±0.2 ±0.2 2 1000 X7R 100 15 ±20 KCM55WR72A156MH01K 6.1 5.3 6.4 1.2 ±0.4 ±0.2 ±0.3 ±0.2 2 500 X7R 100 22 ±20 KCM55WR72A226MH01K 6.1 5.3 6.4 1.2 ±0.4 ±0.2 ±0.3 ±0.2 2 500 ETKCM5502B 14 / 21 Reference only 4. AEC-Q200 Murata Standard Specifications and Test Methods No. 1 2 3 AEC-Q200 Test Item Pre-and Post-Stress Electrical Test High Temperature Exposure (Storage) Appearance Capacitance Change D.F. I.R. Temperature Cycle Specifications The measured and observed characteristics should satisfy the specifications in the following table. No marking defects Set the capacitor for 1,00012 h at 1503C. Let sit for 242 h at room temperature, then measure. within ±15% 0.05 max. 100 MF or more The measured and observed characteristics should satisfy the specifications in the following table. Appearance No marking defects. Capacitance within ±7.5% Change D.F. 0.025 max. I.R. 100 MF or more 4 Destructive Physical Analysis No defects or abnormalities 5 Moisture Resistance The measured and observed characteristics should satisfy the specifications in the following table. Appearance No marking defects. Capacitance within ±7.5% Change D.F. 0.025 max. I.R. AEC-Q200 Test Method Fix the capacitor to the supporting jig in the same manner and under the same conditions as (19). Perform the 1,000 cycles according to the four heat treatments listed in the following table. Let sit for 24±2 h at *room condition, then measure. Step 1 2 3 4 Temp. Room Room -55+0/-3 125+3/-0 (C) Temp. Temp. Time 153 1 153 1 (min.) •Pretreatment Perform the heat treatment at 150+0/-10°C for 60±5 min and then let sit for 24±2 h at *room condition. Per EIA-469 Apply the 24 h heat (25 to 65C) and humidity (80 to 98%) treatment shown below, 10 consecutive times. Let sit for 24±2 h at *room condition, then measure. 100 MF or more 6 Biased Humidity The measured and observed characteristics should satisfy the specifications in the following table. Appearance No marking defects Capacitance within ±15% Change D.F. 0.05 max. I.R. 10 MF or more Apply the rated voltage and DC1.3+0.2/-0 V (add 100k resistor) at 853C and 80 to 85% humidity for 1,00012 h. Remove and let sit for 24±2 h at *room condition, then measure. The charge/discharge current is less than 50mA. •Pretreatment Perform the heat treatment at 150+0/-10°C for 60±5 min and then let sit for 24±2 h at *room condition. 7 Operational Life Apply voltage as in the table for 1000±12 h at maximum operating temperature ±3°C. Let sit for 24±2 h at *room condition, then measure. The measured and observed characteristics should satisfy the specifications in the following table. Appearance No marking defects Capacitance within ±15% Change D.F. 0.05 max. I.R. 10 MF or more T.C. Rated Voltage DC25V, DC35V, DC50V X7R DC63V, DC100V X7S DC25V Applied Voltage 200% of the rated voltage 150% of the rated voltage 150% of the rated voltage Relative humidity:50% max. The charge/discharge current is less than 50mA. •Pretreatment Apply test voltage for 60±5 min at test temperature. Remove and let sit for 24±2 h at *room condition. 8 External Visual No defects or abnormalities Visual inspection 9 Physical Dimension Within the specified dimensions Using calipers and micrometers. * “room condition” Temperature:15 to 35°C, Relative humidity:45 to 75%, Atmosphere pressure:86 to 106kPa ESKCM5501B 15 / 21 Reference only AEC-Q200 Test Item No. 10 11 Resistance to Solvents Appearance Capacitance D.F. I.R. No marking defects Within the specified tolerance 0.025 max. Vibration 100 MF or more Three shocks in each direction should be applied along 3 mutually perpendicular axes of the test specimen (18 shocks). The specified test pulse should be Half-sine and should have a duration :0.5ms, peak value:1,500g and velocity change: 4.7m/s. 0.025 max. Appearance No defects or abnormalities Capacitance Within the specified tolerance D.F. 13 14 Resistance to Soldering Heat Appearance Capacitance Change D.F. I.R. Thermal Shock Appearance Capacitance Change D.F. I.R. 15 ESD AEC-Q200 Test Method Per MIL-STD-202 Method 215 Solvent 1 : 1 part (by volume) of isopropyl alcohol 3 parts (by volume) of mineral spirits Solvent 2 : Terpene defluxer Solvent 3 : 42 parts (by volume) of water 1part (by volume) of propylene glycol Monomethyl ether 1 part (by volume) of monoethanolamine Mechanical Appearance No marking defects Shock Capacitance Within the specified tolerance D.F. 12 Specifications 0.025 max. The measured and observed characteristics should satisfy the specifications in the following table. No marking defects within ±10% 0.025 max. Solder the capacitor to the test jig (glass epoxy board) in the same manner and under the same conditions as (19). The capacitor should be subjected to a simple harmonic motion having a total amplitude of 1.5mm, the frequency being varied uniformly between the approximate limits of 10 and 2,000Hz. The frequency range, from 10 to 2,000Hz and return to 10Hz, should be traversed in approximately 20 min. This motion should be applied for 12 items in each 3 mutually perpendicular directions (total of 36 times). Reflow Soldering : Peak 260+0/-5°C The area of soldering 230°C min., 20 to 40 s Let sit for 24±2 h at *room condition, then measure. •Pretreatment Perform the heat treatment at 150+0/-10°C for 60±5 min. and then let sit for 24±2 h at *room condition. 100 MF or more The measured and observed characteristics should satisfy the specifications in the following table. No marking defects within ±7.5% 0.025 max. 100 MF or more Appearance No marking defects Capacitance Within the specified tolerance D.F. 0.025 max. I.R. 100 MF or more Fix the capacitor to the supporting jig in the same manner and under the same conditions as (19). Perform the 300 cycles according to the two heat treatments listed in the following table(Maximum transfer time is 20 s.). Let sit for 24±2 h at *room condition, then measure. Step 1 2 Temp. -55+0/-3 125+3/-0 (C) Time 153 153 (min.) •Pretreatment Perform the heat treatment at 150+0/-10°C for 60±5 min and then let sit for 24±2 h at *room condition. Per AEC-Q200-002 * “room condition” Temperature:15 to 35°C, Relative humidity:45 to 75%, Atmosphere pressure:86 to 106kPa ESKCM5501B 16 / 21 Reference only AEC-Q200 Test Item No. 16 Solderability Specifications AEC-Q200 Test Method 95% of the terminations are to be soldered evenly and a) Preheat at 155°C for 4 h. After the preheating, following test is done. continuously. Reflow Soldering : Peak 260+0/-5°C The area of soldering 230°C min., 20 to 40 s Let sit for 24±2 h at *room condition, then measure. b) Should be placed into steam aging for 8 h±15 min. After the preheating, following test is done. Reflow Soldering : Peak 260+0/-5°C The area of soldering 230°C min., 20 to 40 s Let sit for 24±2 h at *room condition, then measure. 17 Electrical Apperance CharacteCapacitance rization D.F. No defects or abnormalities Visual inspection. Within the specified tolerance 0.025 max. The capacitance/D.F. should be measured at 25C at the frequency and voltage shown in the table. Nominal capacitance C>10μF C≦10μF I.R. 25 C 100 MF or more I.R. 125C 10 MF or more Dielectric Strength No failure Measuring frequency 12024Hz 10.2kHz The insulation resistance should be measured with a DC voltage not exceeding the rated voltage at 25 C and 125 C within 2 min. of charging. No failure should be observed when voltage in the table is applied between the terminations for 1 to 5 s., provided the charge/discharge current is less than 50mA. Rated Voltage DC25V, DC35V, DC50V, DC63V DC100V 18 Board Flex Appearance Capacitance Change Measuring volgate AC0.50.1V(r.m.s.) AC1.00.2V(r.m.s.) No marking defects Test Voltage 250% of the rated voltage 200% of the rated voltage Solder the capacitor on the test jig (glass epoxy board) shown in Fig1 using solder. Then apply a force in the direction shown in Fig 2 for 51 s. The soldering should be done by the reflow method and should be conducted with care so that the soldering is uniform and free of defects such as heat shock. within ±10% Type K□□55 a 4.5 b 8.0 c 5.6 (in mm) 20 50 Pressurizing speed:1.0mm /s Pressurize R4 Flexure: 5mm Capacitance meter 45 45 Fig.1 Fig.2 * “room condition” Temperature:15 to 35°C, Relative humidity:45 to 75%, Atmosphere pressure:86 to 106kPa ESKCM5501B 17 / 21 Reference only No. 19 AEC-Q200 Test Item Terminal Strength Specifications Appearance No marking defects Capacitance Within specified tolerance D.F. I.R. 0.025 max. 100 MF or more AEC-Q200 Test Method Solder the capacitor to the test jig (glass epoxy board) shown in Fig.3 using solder. Then apply 18N force in parallel with the test jig for 60 s. The soldering should be done by the reflow method and should be conducted with care so that the soldering is uniform and free of defects such as heat shock. Type K□□55 a 2.5 b 8.0 c 5.6 (in mm) b a c (t : 1.6mm) Solder resist Fig.3 20 Beam Load Test Destruction value should be exceed following one. Baked electrode or copper foil Place the capacitor in the beam load fixture as in Fig 4. Apply a force. 15N L 0.6L Fig.4 Speed supplied the Stress Load : 2.5mm / s 21 Capacitance Capacitance Char. X7R : within ±15% Temperature Change Characterist -ics (Temp.Range:-55 to +125°C) Char. X7S : within ±22% (Temp.Range:-55 to +125°C) The capacitance change should be measured after 5 min. at each specified temperature stage. Step 1 2 3 4 5 Temperature(C) 252 Min. Operating Temp. 3 252 Max. Operating Temp. 3 252 The ranges of capacitance change compared with the above 25°C value over the temperature ranges shown in the table should be within the specified ranges. •Pretreatment Perform the heat treatment at 150+0/-10°C for 60±5 min and then let sit for 24±2 h at *room condition. Perform the initial measurement. * “room condition” Temperature:15 to 35°C, Relative humidity:45 to 75%, Atmosphere pressure:86 to 106kPa ESKCM5501B 18 / 21 Reference only Complement of Test Method Test Jig The test jig should be Jig A or Jig B as described in “Specifications and Test methods”. The specimen should be soldered by the conditions as described below. Soldering Method : Reflow soldering Thickness of Metal-mask : 200µm Solder : Sn-3.0Ag-0.5Cu c (1) Test Jig A a 2.6 a b Dimension (mm) Solder resist b 8.0 c 5.6 Baked electrode or copper foil Material : Glass Epoxy Board Thickness : 1.6mm Thickness of copper foil : 0.035mm (2) Test Jig B a d c Dimension (mm) 40 a 2.6 (4.5) b 100 1.6 Copper foil Solder resist Material : Glass Epoxy Board Thickness of copper foil : 0.035mm ESKCM5501B 19 / 21 (unit : mm) b 8.0 c 5.6 d 1.0 Reference only 5. Packing (Taping is standard packing method) (1) Appearance of taping (a) Plastic Tape Cover Tape (Thickness: Around 60m) is put on capacitor on Base Tape (Blister carrier Tape). (b) The sprocket holes are to the right as the Tape is pulled toward the user. (2) Packed capacitors Capacitor 2.00.05 1.5+0.1/-0 4.00.1 8.00.1 1.750.1 (3) Dimensions of Tape (a) Height dimension code : L, Q, T 0.40.1 5.50.05 B 12.00.3  A C max. Nominal value Part Number A B C K□□55L K□□55Q K□□55T 5.5 5.5 5.5 6.4 6.4 6.4 4.1 5.8 5.8 (Unit : mm) 2.00.1 1.5+0.1/-0 4.00.1 12.00.1 1.750.1 (b) Height dimension code : W 0.40.1 7.50.1 B 16.00.3  A Nominal value Part Number K□□55W A 5.7 B 6.7 C max. C 7.4 (Unit : mm) EKTK5501 20 / 21 Reference only 100+1/-0 (4) Dimensions of Reel (a) Height dimension code : L, Q, T 2.00.5 φ210.8 17.51.5 3302.0 φ130.2 (Unit : mm) 13.51.0 (b) Height dimension code : W 801.0 21.51.0 2.00.5 φ210.8 3302.0 φ130.2 (Unit : mm) 17.51.0 (5) Part of the leader and part of the empty tape should be attached to the end of the tape as follows. Vacant section : 160 min. Capacitors mounting unit 210 min. Vacant section : 190 min. Direction of feed (Unit : mm) (6) The top tape or cover tape and base tape are not attached at the end of the tape for a minimum of 5 pitches. (7) Missing capacitors number within 0.1% of the number per reel or 1pc, whichever is greater, and not continuous (8) The top tape or cover tape and bottom tape should not protrude beyond the edges of the tape and should not cover sprocket holes. (9) Cumulative tolerance of sprocket holes, 10 pitches : ±0.3mm. (10) Peeling off force : 0.1 to 0.6N in the direction shown on the follows. 165 to 180° Top Tape or Cover Tape Base Tape EKTK5501 21 / 21 Appendix EU RoHS This products of the following crresponds to EU RoHS. RoHS  maximum concentration values tolerated by weight in homogeneous materials  ・1000 ppm maximum Lead  ・1000 ppm maximum Mercury  ・100 ppm maximum Cadmium  ・1000 ppm maximum Hexavalent chromium  ・1000 ppm maximum Polybrominated biphenyls (PBB)  ・1000 ppm maximum Polybrominated diphenyl ethers (PBDE)
KCM55WR7YA476MH01L 价格&库存

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KCM55WR7YA476MH01L
    •  国内价格
    • 1+37.64132
    • 9+25.92118
    • 21+22.58479

    库存:416

    KCM55WR7YA476MH01L
      •  国内价格 香港价格
      • 200+19.86465200+2.46420
      • 400+19.77182400+2.45269
      • 600+19.77138600+2.45263
      • 800+19.77095800+2.45258
      • 1000+19.770511000+2.45253

      库存:200