ERZVS34C821

Varistors (ZNR Surge Absorber) SC type Varistors (ZNR Surge Absorber) Type SC protects power supply facilities, communications equipment from steep lightning surges, and it is a suitable product to incorporate it in a serge protective device corresponding to the Japanese Industrial Standards (JIS C 5381-1). Features ●Very large surge withstanding capability with a compact size ●Fast response to steep impulse voltage ●Low clamping voltage for better surge protection ●No follow-on current ●RoHS compliant Recommended applications ●Power suppliers for OA, FA, telecommunication or industrial equipment ●Traffic or railroad systems ●Surge protection of automatic control devices for power distribution line ■ As for handling precautions and minimum quantity / Packing unit please see related information. Explanation of part numbers 1 2 3 4 5 6 7 8 Ｅ Ｒ Ｚ Ｖ Ｓ 3 4 Ｃ Shape Element size Product code Series 9 10 　 Type 11 　 Nominal varistor voltage 　 12 　 Design No. Ratings and characteristics ●Operating temperature range : -40 to 85 ℃ Part No. Varistor voltage at 1 ｍＡ ●Storage temperature range : ‒40 to 125 ℃ Maximum allowable voltage Voltage protection level ERZVS34C201 200(185 to 225) Acrms (Ｖ) 130 ERZVS34C241 240(216 to 264) 150 200 395 900 ERZVS34C271 270(247 to 303) 175 225 455 1000 (Ｖ) DC (Ｖ) 170 Maximum clamping voltage Ｖ250 Ａ 340 UP(V) (at In) 800 ERZVS34C361 360(324 to 396) 230 300 595 1200 ERZVS34C431 430(387 to 473) 275 350 710 1500 ERZVS34C471 470(423 to 517) 300 385 775 1500 ERZVS34C511 510(459 to 561) 320 415 845 1500 ERZVS34C621 620(558 to 682) 385 505 1025 2000 ERZVS34C751 750(675 to 825) 460 615 1240 2500 ERZVS34C821 820(738 to 902) 510 670 1355 2500 ERZVS34C951 950(855 to 1045) 575 765 1570 3000 Design and specifications are each subject to change without notice. Ask factory for the current technical specifications before purchase and/or use. Should a safety concern arise regarding this product, please be sure to contact us immediately. Nominal discharge current Maximum discharge current In(8/20 μS) Imax(8/20 μS) 20kA 40kA 14-Dec-20 SC type Typical characteristics Voltage vs. Current　(ERZVS34C201 to ERZVS34C951) 10000 Max.Leakage Current Max.Clamping Voltage ERZVS34C951 ERZVS34C821 ERZVS34C751 ERZVS34C621 ERZVS34C511 ERZVS34C471 ERZVS34C431 ERZVS34C361 ERZVS34C271 ERZVS34C241 ERZVS34C201 ERZVS34C951 ERZVS34C821 ERZVS34C751 ERZVS34C621 ERZVS34C511 ERZVS34C471 Voltage (V) 1000 100 ERZVS34C431 ERZVS34C361 ERZVS34C271 ERZVS34C241 ERZVS34C201 Test current waveform 10–6 to 10–3 A: Direct current 10–1 to 105 A: 8/20 μs 10 1.E-06 1.E-05 1.E-04 1.E-03 1.E-02 1.E-01 1.E+00 1.E+01 1.E+02 1.E+03 1.E+04 1.E+05 Current (A) Dimensions in mm (not to scale) Unit : mm T D Part No. ERZVS34C201 ERZVS34C241 ERZVS34C271 ERZVS34C361 ERZVS34C431 ERZVS34C471 ERZVS34C511 ERZVS34C621 ERZVS34C751 ERZVS34C821 ERZVS34C951 ZNR H Part number Date code 18 25 7 36 47 T max. 9.0 9.2 9.5 10.4 11.1 11.3 9.7 9.7 10.5 11.0 11.5 8 7 H max. Ｄ max. 2 ø3.4 Minimum quantity / Packing unit Product Series / Type Part number “ZNR” Transient/ surge absorbers SC type ERZVS34C□□□ Minimum Packing quantity quantity in carton / Packing unit 10 200 Carton (about) L×W×H (mm) 320×430×65 Part No., quantity and country of origin are designated on outer packages in English. ※ Please contact local sales office about packing specifications. Design and specifications are each subject to change without notice. Ask factory for the current technical specifications before purchase and/or use. Should a safety concern arise regarding this product, please be sure to contact us immediately. 14-Dec-20 Safety and Legal Matters to Be Observed Safety and Legal Matters to Be Observed 　Product specifications and applications ■ Please be advised that this product and product specifications are subject to change without notice for improvement purposes. Therefore, please request and confirm the latest delivery specifications that explain the specifications in detail before the final design, or purchase or use of the product, regardless of the application. In addition, do not use this product in any way that deviates from the contents of the company's delivery specifications. 　 ■ Unless otherwise specified in this catalog or the product specifications, this product is intended for use in general electronic equipment (AV products, home appliances, commercial equipment, office equipment, information and communication equipment, etc.). When this product is used for the following special cases, the specification document suited to each application shall be signed/sealed (with Panasonic and the user) in advance..These include applications requiring special quality and reliability, wherein their failures or malfunctions may directly threaten human life or cause harm to the human body (e.g.: space/aircraft equipment, transportation/traffic equipment, combustion equipment, medical equipment, disaster prevention/crime prevention equipment, safety equipment, etc.). 　 　Safety design and product evaluation ■ Please ensure safety through protection circuits, redundant circuits, etc., in the customer's system design so that a defect in our company's product will not endanger human life or cause other serious damage. ■ This catalog shows the quality and performance of individual parts. The durability of parts varies depending on the usage environment and conditions. Therefore, please ensure to evaluate and confirm the state of each part after it has been mounted in your product in the actual operating environment before use. If you have any doubts about the safety of this product, then please notify us immediately, and be sure to conduct a technical review including the above protection circuits and redundant circuits at your company. 　Laws / Regulations / Intellectual property ■ The transportation of dangerous goods as designated by UN numbers, UN classifications, etc., does not apply to this product. In addition, when exporting products, product specifications, and technical information described in this catalog, please comply with the laws and regulations of the countries to which the products are exported, especially those concerning security export control. ■ Each model of this product complies with the RoHS Directive (Restriction of the use of hazardous substances in electrical and electronic equipment) (2011/65/EU and (EU) 2015/863). The date of compliance with the RoHS Directive and REACH Regulation varies depending on the product model. Further, if you are using product models in stock and are not sure whether or not they comply with the RoHS Directive or REACH Regulation, please contact us by selecting "Sales Inquiry" from the inquiry form. ■ During the manufacturing process of this product and any of its components and materials to be used, Panasonic does not intentionally use ozone-depleting substances stipulated in the Montreal Protocol and specific bromine-based flame retardants such as PBBs (Poly-Brominated Biphenyls) / PBDEs (Poly-Brominated Diphenyl Ethers). In addition, the materials used in this product are all listed as existing chemical substances based on the Act on the Regulation of Manufacture and Evaluation of Chemical Substances. ■ With regard to the disposal of this product, please confirm the disposal method in each country and region where it is incorporated into your company's product and used. 　 ■ The technical information contained in this catalog is intended to show only typical operation and application circuit examples of this product. This catalog does not guarantee that such information does not infringe upon the intellectual property rights of Panasonic or any third party, nor imply that the license of such rights has been granted. Panasonic Industry will assume no liability whatsoever if the use of our company's products deviates from the contents of this catalog or does not comply with the precautions. Please be advised of these restrictions. 01-Dec-23 Matters to Be Observed When Using This Product Matters to Be Observed When Using This Product (E / CK / SC-type) 　Safety measures An abnormal state of E-Type, CK-type, and SC-type varistors (ZNR surge absorber, hereinafter "the product" or "the surge absorber") that results from a problem with service conditions (materials used, the surrounding environment, power conditions, circuit conditions, etc.) may cause a fire accident, electric shock accident, burn accident, or product failure. Matters to note when handling this product will hereinafter be described. What is described below should be checked sufficiently before the product is used. ■ Confirming rated capabilities Use the surge absorber within the range of its rated capabilities. Each type of surge absorber has specified rated capabilities including a maximum allowable circuit voltage, a surge current tolerance, an energy tolerance, an impulse lifespan (surge lifespan), average pulse power, and a service temperature. Using the surge absorber under severe service conditions that are beyond the rated capabilities causes degraded performance of the surge absorber or destruction of a circuit element, which may lead to smoke generation, ignition, etc. ■ Take the following measures in order to avoid an accident caused by expected phenomenon. (1) Destruction of the surge absorber may scatter its fractured pieces around. To protect other elements from these pieces, set product in a case or shield it with a cover. (2) Do not place the surge absorber near combustible materials (vinyl cable, resin mold, etc.). If avoiding the vicinity of combustible materials is difficult, protect the combustible material with an incombustible cover. (3) Surge absorber placed between lines When the surge absorber is placed between lines, connect a normal type current fuse in series with the surge absorber. * See "Current fuse" in the "Circuit design and circuit board design" section. (4) Surge absorber placed between a line and the ground ① When the surge absorber is placed between a line and the ground, even if the surge absorber short-circuits, ground resistance will remain in the section between the line and the ground, leaving a possibility that the current fuse won’t blow, in which case the outer sheath resin of the surge absorber may generate smoke or ignite due to current flow. To prevent such a case, place an earth leakage breaker in a location closer to the power supply than the surge absorber. When not using an earth leakage breaker, use a current fuse and temperature fuse in series with each other. * See Table 1 in the "Circuit design and circuit board design" section. ② When the surge absorber is placed between a live part and a metal case, it may cause electric shock if the surge absorber short-circuits. To avoid this, ground the metal case or shield it to prevent direct contact with the metal case. ■ In case the surge absorber should short-circuit and generate smoke or ignite, immediately cut off current flow to the surge absorber. ■ Rated voltage for UL certification, etc. To allow the surge absorber to meet leak current requirements, etc., a maximum allowable circuit voltage and rated voltage are specified for the surge absorber. When applying for UL certification, etc. of a device equipped with a surge absorber, ensure the working voltage of the device does not exceed the rated voltage of the surge absorber. ■ An unexpected sharp rise in the working voltage, an incoming excessive surge, etc., may cause the surge absorber to generate smoke or ignite. In such a case, fire spreading through the device should be prevented to avoid expanded damage. To achieve this, take a multi-protection measure, such as adopting fire-resistant materials that make up the outer shell components and structural materials. 　Use environments and cleaning conditions ■ Do not use the surge absorber in an outdoor environment where the surge absorber is exposed to sunlight. ■ Do not use the surge absorber in which direct sunlight hits the surge absorber or near a heating element where the temperature of the surge absorber would rise above its working temperature. ■ Do not use the surge absorber in a place where the surge absorber is exposed to wind or rain or a highly humid place where steam is emitted or dew concentrates. ■ Do not use the surge absorber in a place filled with dust or salt, in an atmosphere contaminated with a corrosive gas, etc., or in liquids such as water, oil, chemical, or organic solvents. 30-Jun-23 Matters to Be Observed When Using This Product ■ Do not wash the surge absorber with a solvent (thinner, acetone, etc.) that damages the outer sheath resin. 　Response to anomalies and handling conditions Be careful not to drop the surge absorber on the floor, etc. The product is likely to suffer mechanical or electrical damage when dropped on the floor. Avoid using such a product. 　Reliability and product life To know the detailed specifications of individual products or specific evaluation test scores, please contact us. 　Circuit design and circuit board design Meet the following requirements. Not following the requirements can result in a shorter lifespan of the surge absorber or its failure. ■ Choose a surge absorber whose maximum allowable circuit voltage has a margin relative to the maximum voltage range including source voltage fluctuations. * See Table 1 in the "Circuit design and circuit board design" section. ■ When surges are applied intermittently to the surge absorber at short intervals (when pulses of voltages are applied in a noise simulator test, etc.), make sure that the surge power does not exceed the maximum average pulse power of the surge absorber. ■ The product numbers of recommended surge absorbers to choose are shown in Table 1. (1) The case of placing the surge absorber between lines When the source voltage is expected to rise temporarily due to unbalanced single-wire loads in a three-phase three-wire connection configuration, a short circuit between a voltage line and a neutral line, loss of the neutral line, or resonance of a capacitive load caused by switching on/off, use a surge absorber (varistor) indicated by "*" in Table 1. (2) The case of placing the surge absorber between a line and the ground Line-to-ground voltage may rise with a single-wire ground fault, etc. Use a recommended surge absorber in Table 1 that is different from the surge absorber placed between lines. When the device is subjected to an insulation resistance test (500 V DC), use a surge absorber indicated by "**" in Table 1. According to "Electrical Appliance Technical Standards" based on the Electrical Appliance and Material Safety Act, when using a varistor voltage which would fail the insulation performance test, the surge absorber may be removed from the device when being subjected to the test, depending on circuit test conditions. * See attached table 4, appendix 4, "Electrical Appliance Technical Standards" based on the Electrical Appliance and Material Safety Act. When conducting a withstand voltage test (1000 V AC) of the device, remove the surge absorber from the device after getting approval from the parties concerned. ■ Current fuse (1) Select a surge absorber and fuses to use in as shown in the following table. Confirm that no secondary accident arises when the surge absorber in an actual circuit breaks. Selected rated currents of current fuses shown in the following table are exemplary one and may vary depending on circuit conditions used. Confirm the rated current by a test, etc., before using the current fuse. Series ERZC 20EK□□□(□) ERZC 32EK□□□(□) ERZV S34C□□□ ERZC □□CK□□□W Current fuse (placed between lines) 10 A max. 20 A max. 20 A max. 20 A max. Temperature fuse (placed between a line and the ground) 100 to 120℃ 5A 100 to 120℃ 10A 100 to 120℃ 10A 100 to 120℃ 10A * Use the rated voltage of the current fuse that corresponds to the circuit voltage of a circuit including the current fuse. * Connect a temperature fuse directly to the terminal so that heat from the terminal is easily transferred to the fuse and that the fusing element of the fuse extends along its sides. (2) Recommended parts where fuses are connected are shown in Table 1. When a load current to a protected device is so large as to exceed the rated current of the fuse, however, connect the fuse in a location shown in the following diagram. Power supply Current fuse ZNR Protected device 30-Jun-23 Matters to Be Observed When Using This Product Table 1 Application example of the product (ordinary application example) Surge absorber placed between lines DC Single-phase AC DC Single-phase AC Current fuse ZNR1 L L Protected device N Connection Surge absorber placed between a line and the ground N Current fuse Protected device ZNR2 Thermal coupling Three-phase AC ZNR1 Temperature fuse Three-phase AC Current fuse Current fuse ZNR3 ZNR3 ZNR3 Protected device ZNR3 Protected device ZNR4 ZNR3 Varistor voltage selection ZNR Power supply voltage [AC] Part number E, CK, SC-type 100 V ZNR 1 ZNR 3 120 V 200 V to 220 V Temperature fuse Thermal coupling ZNR 201 to 361* ERZC□□EK ERZC□□CK ERZVS34C 240 V 241 to 431* 471 to 621* Power supply voltage [AC] Part number E, CK, SC-type 100V to 220 V ERZC□□EK ERZC□□CK ERZVS34C ZNR 2 ZNR 4 240 V 511, 621* 471 511 821 or higher** 511 821 or higher** * To find out about surge absorbers that can be used in an AC withstand voltage test, please contact us. 　Processing conditions ■ Do not apply vibration, impact (drop impact, etc.), or pressure strong enough to crack the outer sheath resin or absorber body of the surge absorber. ■ When coating the surge absorber with a resin or embedding it in a resin mold, avoid using a resin that degrades the surge absorber. ■ Do not bend the surge absorber or apply force thereto close to the insulation cover of the lead terminal. ■ Make the wire as short and straight as possible. 　Mounting and storage conditions ■ Do not melt solder or the insulation material making up the surge absorber when soldering the lead terminal. ■ Do not keep the product in a high-temperature or high-humidity condition. Keep the surge absorber in a room with a temperature of 40 ℃ or lower and a relative humidity of 75% or lower and use the surge absorber within two years of storage. ■ Keep the surge absorber in a place where no corrosive gas atmosphere (hydrogen sulfide, sulfurous acid, chlorine, ammonia, etc.) is present. ■ Keep the surge absorber in a place where the surge absorber is protected from direct sunlight, dew concentration, etc. 30-Jun-23