LRH2512-22R050F4

RALEC Document No. Released Date Page No. LRH Series Metal Alloy Low-Resistance Resistor Product Specifications 旺詮 IE-SP-089 2021/05/13 1 1 Scope: 1.1 This specification is applicable to lead free and halogen free for LRH series low-inductance metal alloy low-resistance resistor. 1.2 The product is belong to the universal series. 2 Explanation Of Part Numbers: LRH 2512 Type Size (inch) Low-Inductance Metal Alloy Low Resistance Resistor 0402 0603 0805 1206 2512 - 2 2 R003 F 5 Number of Terminals Rated Power Resistance (4~6 Digits) Tolerance Packaging 2: 2 terminals H=0.20W F=0.33W C=0.50W A=1.50W 1=1.00W 2=2.00W 3=3.00W EX: R003 = 3mΩ R0015 = 1.50mΩ R0005 = 0.50mΩ R00075= 0.75mΩ D=±0.5% F=±1.0% G=±2.0% J=±5.0% 4=4,000pcs 5=5,000pcs 10=10,000pcs 3 Product Specifications: Max. # of Type Rating Terminals Power 0402 2 0.20W 0603 2 0.33W 0805 2 0.5W (Ir) Rating Current Ir=�P⁄R Ir: Rating Current (A) P :Rating Power(W) R: R value(Ω (Io) Overload Current Io=�NP⁄R Io: Overload Current (A) P: Rating Power(W) R: R value(Ω) N: LRH2512：5 Others：4 0.5W 1206 2 1.0W 2512 Written 2 1.5W 2.0W 3.0W IE Checked Resistance Range (mΩ) Operating T.C.R. Inductance F (±1%) Temperature (ppm/°C) Range D (±0.5%) G (±2%) J (±5%) ≦±800 ≦±200 ≦±125 ≦±50 ≦±450 ≦±75 ≦±50 ≦±450 ≦±100 ≦±75 ≦±50 ≦±400 ≦±75 ≦±50 ≦±400 ≦±75 ≦±50 ≦±50 Approved QA Signing < 5nH -----------------7~50 7~50 7~10 Remark 1.5 3≦R≦4 5 10 1≦R＜4 4≦R＜8 8≦R≦24 1≦R＜2 2≦R＜3 3≦R＜5 5≦R≦19 1≦R＜2 2≦R＜4 4≦R≦21 1≦R＜2 2≦R＜4 4≦R≦10 -55~+150°C 3~100 3~70 3~10 -55~+170°C Issue Dep.DATA Center. IT'S NOT UNDER CONTROL FOR PDF FILE PLS NOTE THE VERSION STATED.. Do not copy without permission 60 Series No. RALEC 旺詮 LRH Series Metal Alloy Low-Resistance Resistor Product Specifications Document No. Released Date Page No. IE-SP-089 2021/05/13 2 3.1 Power Derating Curve: Type Operating Temperature Range Explain 0402/0603/0805/1206 2512 －55℃ ~ ＋150℃ －55℃ ~ ＋170℃ For resistors operated in ambient temperatures above 70℃, power rating shall be derated in accordance with figure below. 100 For resistors operated in ambient temperatures above 70℃, power rating shall be derated in accordance with figure below. 100 70 80 Rating Power (%) Rating Power (%) 80 Figure 60 40 20 60 40 20 0 0 -55 Remark 70 75 100 125 150 160 Ambient Temperature (℃) 0 25 50 IT'S NOT UNDER CONTROL FOR PDF FILE PLS NOTE THE VERSION STATED.. Do not copy without permission -55 25 50 75 100 125 150 170 Ambient Temperature (℃) 0 Issue Dep.DATA Center. 60 Series No. RALEC 旺詮 LRH Series Metal Alloy Low-Resistance Resistor Product Specifications Document No. Released Date Page No. IE-SP-089 2021/05/13 3 4 Physical Dimensions: 0402 0603 0805 1206 Type Power Rating (Watts) 0402 0.20W 0603 0.33W Resistance Range (mΩ) 1.5 3~5 10 1~24 2512 Dimensions - in inches (millimeters) L W H T1 0.039±0.004 (1.00±0.100) 0.020±0.004 (0.50±0.100) 0.014±0.004 (0.35±0.10) 0.010±0.004 (0.25±0.100) 0.063±0.008 (1.60±0.20) 0.031±0.008 (0.80±0.20) 0.08±0.008 (2.0320±0.20) 0.05±0.008 (1.270±0.20) 0.014±0.004 (0.35±0.10) 0.014±0.004 (0.35±0.10) 0.014±0.004 (0.35±0.10) 0.014±0.004 (0.35±0.10) 0.126±0.008 (3.20±0.20) 0.063±0.008 (1.60±0.20) 0.016±0.008 (0.40±0.20) 0.246±0.010 (6.248±0.254) 0.126±0.010 (3.202±0.254) 0.0254±0.010 (0.645±0.254) 0.012±0.006 (0.30±0.15) 0.023±0.006 (0.60±0.15) 0.02±0.006 (0.50±0.15) 0.014±0.008 (0.35±0.20) 0.035±0.008 (0.90±0.20) 0.028±0.008 (0.70±0.20) 0.014±0.008 (0.35±0.20) 0.044±0.010 (1.118±0.254) 0.034±0.010 (0.868±0.254) 1 0805 0.50W 2 3~19 1≦R＜3 1206 0.5 1 3≦R＜4 4≦R≦21 3~70 1.50W 71~100 2512 Remark 2.00W 3~70 3.00W 3~10 IT'S NOT UNDER CONTROL FOR PDF FILE PLS NOTE THE VERSION STATED.. Do not copy without permission 0.044±0.010 (1.118±0.254) Issue Dep.DATA Center. 60 Series No. RALEC 旺詮 Document No. Released Date Page No. LRH Series Metal Alloy Low-Resistance Resistor Product Specifications IE-SP-089 2021/05/13 4 4.1 Material of Alloy Type Material Resistance 0402 Manganese-Copper Alloy 1.5mΩ / 3-4mΩ / 5mΩ /10mΩ 0603 Manganese-Copper Alloy 1mΩ- 24mΩ 0805 Manganese-Copper Alloy 1mΩ- 19mΩ 1206 Manganese-Copper Alloy 1mΩ- 21mΩ Manganese-Copper Alloy 3mΩ- 5mΩ Nickel-Chromium- Aluminum Alloy 6mΩ- 100mΩ 2512 5 Reliability Performance: 5.1 Electrical Performance: Test Item Conditions of Test (R2-R1) R1 (T2-T1) ● TCR (ppm/℃) = --------------------- X 106 Temperature Coefficient of Resistance (TCR) Short Time Overload Insulation Resistance Dielectric Withstanding Voltage Remark ● R1: resistance of room temperature ● R2: resistance of 150 °C ● T1: Room temperature ● T2: Temperature at 150 °C ● Refer to JIS C 5201-1 4.8 Applied Overload for 5 seconds and release the load for about 30 minutes, then measure its resistance variance rate. (Overload condition refer to below): Type Power (W) # of rated power 0402 0.2 4 times 0603 0.33 4 times 0805 0.5 4 times 0.5、1 1206 4 times 1.5 5 times 2512 2.0 5 times 3.0 5 times Refer to JIS C 5201-1 4.13 Put the resistor in the fixture, add 100 VDC in + ,- terminal for 60secs then measured the insulation resistance between electrodes and insulating enclosure or between electrodes and base material. Refer to JIS-C5201-1 4.6 Applied 300VAC for 1 minute, and Limit surge current 50 mA (max.) Refer to JIS-C5201-1 4.7 IT'S NOT UNDER CONTROL FOR PDF FILE PLS NOTE THE VERSION STATED.. Do not copy without permission Test Limits Refer to Paragraph 3. general specifications 0402、0805、1206：≦±0.5% 2512：≦±2% ≧108Ω No short or burned on the appearance. Issue Dep.DATA Center. 60 Series No. RALEC 旺詮 LRH Series Metal Alloy Low-Resistance Resistor Product Specifications Document No. Released Date Page No. IE-SP-089 2021/05/13 5 5.2 Mechanical /Constructional Performance: Test Item Conditions of Test Test method: ◎Test item 1 (Adhesion): A static load using a R0.1 scratch tool shall be applied on the core of the component and in the direction of the arrow and held for 10 seconds and under 20N load measured its resistance variance rate. Test Limits Test item 1: (1).Variance rate on resistance： ±1.0% (2).No evidence of mechanical damage. No terminal peeling off. Test item 2: (1).Variance rate on resistance： ±1.0% Joint Strength of Solder Resistance to Solder Heat Solderability Core Body Strength (1206 ((included)) above applies) Remark Refer to JIS-C5201-1 4.32 ◎Test item 2 (Bending Strength): Solder tested resistor on to PC board add force in the middle down, and under load measured its resistance variance rate. 2512, 1206, 0805,D=3mm, 0603 D=5mm (2).No evidence of mechanical damage. No terminal peeling off and core body cracked. Refer to JIS-C5201-1 4.33 The tested resistor be immersed 25 mm/sec into molten ≦±0.5% solder of 260±5℃ for 10±1secs. Then the resistor is left in No evidence of mechanical damage the room for 1 hour, and measured its resistance variance rate. Refer to JIS-C5201-1 4.18 Add flux into tested resistors, immersion into solder bath in Solder coverage over 95% temperature 245±5℃ for 3±0.5secs. Refer to JIS-C5201-1 4.17 Applied R0.5 test probe at its central part then pushing 5N force on ≦±0.5% the sample for 10 sec. No evidence of mechanical damage Refer to JIS-C5201-1 4.15 IT'S NOT UNDER CONTROL FOR PDF FILE PLS NOTE THE VERSION STATED.. Do not copy without permission Issue Dep.DATA Center. 60 Series No. RALEC 旺詮 LRH Series Metal Alloy Low-Resistance Resistor Product Specifications Test Item Vibration Resistance to solvent Conditions of Test Document No. Released Date Page No. IE-SP-089 2021/05/13 6 Test Limits The resistor shall be mounted by its terminal leads to the ≦±0.5% supporting terminals on the solid table. The entire frequency No evidence of mechanical damage range :from 10 Hz to 55 Hz and return to 10 Hz, shall be transferred in 1 min. Amplitude : 1.5mm This motion shall be applied for a period of 4 hours in each 3 mutually perpendicular directions (a total of 12hrs) Refer to JIS-C5201-1 4.22 The tested resistor be immersed into isopropyl alcohol of ≦±0.5% 20~25℃ for 60secs, then the resistor is left in the room for No evidence of mechanical damage 48 hrs. Refer to JIS-C5201-1 4.29 5.3 Environmental Performance: Test Item Conditions of Test Test Limits Put the tested resistor in chamber under temperature -55±2 ≦±0.5% Low Temperature ℃ for 1,000 hours. Then leaving the tested resistor in room No evidence of mechanical damage Exposure temperature for 60 minutes, and measure its resistance (Storage) variance rate. Refer to JIS-C5201-1 4.23.4 Put tested resistor in chamber under temperature ≦±1.0% High Temperature 2512:170±5℃(Others:150±5℃) for 1,000 hours. Then No evidence of mechanical damage Exposure leaving the tested resistor in room temperature for 60 (Storage) minutes, and measure its resistance variance rate. Refer to JIS-C5201-1 4.23.2 Put the tested resistor in the chamber under the temperature 0402、0603、0805、1206：≦±1.0% cycling which shown in the following table shall be repeated 2512：≦±0.5% 300 times consecutively. Then leaving the tested resistor in Temperature the room temperature for 60 minutes, and measure its Cycling (Rapid resistance variance rate. Temperature Testing Condition No evidence of mechanical damage Change) Lowest Temperature -55 +0/-10℃ Highest Temperature 150 +10/-0℃ Refer to JIS-C5201-1 4.19 Put the tested resistor in chamber and subject to 10 cycles ≦±0.5% Moisture of damp heat and without power. Each one of which consists No evidence of mechanical damage of the steps 1 to 7 (Figure 1). Then leaving the tested Resistance resistor in room temperature for 24 hr, and measure its (Climatic resistance variance rate. Sequence) Refer to MIL-STD 202 Method 106 0402、0603：≦±1.0% Put the tested resistor in chamber under 85± 5℃and 85± Bias Humidity Remark 0805、1206、2512：≦±0.5% 5%RH with 10% bias and load the rated voltage for 90 No evidence of mechanical damage minutes on, 30 minutes off, total 1,000 hours. Then leaving the tested resistor in room temperature for 60 minutes, and measure its resistance variance rate. Refer to JIS-C5201-1 4.24 IT'S NOT UNDER CONTROL FOR PDF FILE PLS NOTE THE VERSION STATED.. Do not copy without permission Issue Dep.DATA Center. 60 Series No. RALEC 旺詮 Test Item Whisker Test LRH Series Metal Alloy Low-Resistance Resistor Product Specifications Document No. Released Date Page No. Conditions of Test IE-SP-089 2021/05/13 7 Test Limits ◎Test item (Thermal Shock test): Max. 50μm Testing Condition Minimum storage temperature -55+0/-10℃ Maximum storage temperature 85+10/-0℃ Temperature-retaining time 10 min. Number of temperature cycles 1,500 ◎Inspection: Inspect for whisker formation on specimens that underwent the acceleration test specified in subciause 4.2, with a magnifier (stereo microscope) of about 40 or higher magnification. If judgment is hard in this method, use a scanning electron microscope (SEM) of about 1,000 or higher magnification. By JESD Standard NO.22A121 class 2. 5.4 Operational Life Endurance: Test Item Load Life Remark Conditions of Test Test Limits Put the tested resistor in chamber under temperature 70± 0402、0603、0805、1206：≦±1.0% 2℃ and load the rated voltage for 90 minutes on 30 minutes 2512：≦±2.0% No evidence of mechanical damage off, total 1000 hours. Then leaving the tested resistor in room temperature for 60 minutes, and measure its resistance variance rate. Refer to JIS-C5201-1 4.25 IT'S NOT UNDER CONTROL FOR PDF FILE PLS NOTE THE VERSION STATED.. Do not copy without permission Issue Dep.DATA Center. 60 Series No. RALEC 旺詮 Remark LRH Series Metal Alloy Low-Resistance Resistor Product Specifications IT'S NOT UNDER CONTROL FOR PDF FILE PLS NOTE THE VERSION STATED.. Do not copy without permission Document No. Released Date Page No. IE-SP-089 2021/05/13 8 Issue Dep.DATA Center. 60 Series No. RALEC 旺詮 Document No. Released Date Page No. LRH Series Metal Alloy Low-Resistance Resistor Product Specifications IE-SP-089 2021/05/13 9 6 Marking Format: 6.1 Marking Styles by Laser(For LRH0805/LRH1206): LRH0805 LRH1206 6.2 LRH1206、LRH2512 Series: Product resistance is indicated by using two marking notation styles: a. “R” designates the decimal location in ohms, e.g. ● For 1mΩ the product marking is R001; ● For 25mΩ the product marking is R025; ● For 100mΩ the product marking is R100. b. “m” designates the decimal location in milliohms, e.g. ● ● ● ● Remark For 0.25mΩ the product marking is 0m25; For 0.5mΩ the product marking is 0m50; For 5.5mΩ the product marking is 5m50; For 25.5mΩ the product marking is 25m5. R005 Ex. Resistance 5mΩ 5m25 Ex. Resistance 5.25mΩ 25m5 Ex. Resistance 25.5mΩ IT'S NOT UNDER CONTROL FOR PDF FILE PLS NOTE THE VERSION STATED.. Do not copy without permission Issue Dep.DATA Center. 60 Series No. RALEC Document No. Released Date Page No. LRH Series Metal Alloy Low-Resistance Resistor Product Specifications 旺詮 IE-SP-089 2021/05/13 10 6.3 Marking Styles by Laser(For LRH1206): Marking Type R m 1 2 3 4 5 6 7 8 9 0 1206 6.4 Marking Style(For LRH2512): Marking Type R m 1 2 3 4 5 6 7 8 9 0 2512 6.5 LRH0402、LRH0603 No Marking. 7 Plating Thickness: 7.1 Ni：≧2μm 7.2 Sn(Tin)：≧3μm 7.3 Sn(Tin)：Matte Sn 8 Measurement Point： Bottom electrode Unit : mm DIM A B LRH0402 0.65±0.05 0.20±0.05 LRH0603 1.25±0.05 0.30±0.05 LRH0805 1.65±0.05 0.70±0.05 LRH1206 2.70±0.05 0.40±0.05 LRH2512 5.25±0.25 2.25±0.25 TYPE Remark IT'S NOT UNDER CONTROL FOR PDF FILE PLS NOTE THE VERSION STATED.. Do not copy without permission Issue Dep.DATA Center. 60 Series No. RALEC 旺詮 LRH Series Metal Alloy Low-Resistance Resistor Product Specifications Document No. Released Date Page No. IE-SP-089 2021/05/13 11 9 Taping specifications: 9.1 Carrier Tape Dimensions: 9.2 Embossed Tape Dimensions: Unit: mm DIM A B W 0402 1.15±0.05 0.65±0.05 8.0±0.20 1.75±0.10 3.5±0.05 0.40+0.2/-0 0.40±0.05 2.0±0.10 4.0±0.05 40.0±0.20 2.0±0.05 0603 1.80±0.10 1.00±0.10 8.0±0.20 1.75±0.10 3.5±0.05 0.40+0.2/-0 0.40±0.05 4.0±0.10 4.0±0.10 40.0±0.20 2.0±0.05 0805 2.30±0.10 1.55±0.10 8.0±0.20 1.75±0.10 3.5±0.05 0.40+0.2/-0 0.40±0.05 4.0±0.10 4.0±0.10 40.0±0.20 2.0±0.05 1206 3.50±0.20 1.90±0.20 8.0±0.20 1.75±0.10 3.5±0.05 0.60+0.2/-0 0.60±0.05 4.0±0.10 4.0±0.10 40.0±0.20 2.0±0.05 2512 6.75±0.10 3.50±0.10 12.0±0.15 1.75±0.10 5.5±0.10 1.30±0.10 Item Remark E F T1 IT'S NOT UNDER CONTROL FOR PDF FILE PLS NOTE THE VERSION STATED.. Do not copy without permission T2 P P0 10*P0 P1 0.20±0.05 4.0±0.10 4.0±0.10 40.0±0.20 2.0±0.10 Issue Dep.DATA Center. 60 Series No. RALEC LRH Series Metal Alloy Low-Resistance Resistor Product Specifications 旺詮 Document No. Released Date Page No. IE-SP-089 2021/05/13 12 9.3 Packaging model: Type Tape width 0402 0603 0805 1206 8mm 8mm 8mm 8mm 2512 12mm Max. Packaging Quantity (pcs/reel) Carrier Tape Embossed Plastic Type 2mm pitch 4mm pitch 4mm pitch 10,000pcs --5,000pcs -5,000pcs --5,000pcs --- -- 4,000pcs 9.4 Reel Dimensions: Unit: mm Remark Item Reel Type / Tape Wa M A B C D 0402 7” reel for 8 mm tape 9.0±0.5 178±2.0 2.0±0.5 13.5±0.5 21.0±0.5 60.0±1.0 0603 7” reel for 8 mm tape 9.0±0.5 178±2.0 2.0±0.5 13.5±0.5 21.0±0.5 60.0±1.0 0805 1206 7” reel for 8 mm tape 9.0±0.5 178±2.0 2.0±0.5 13.5±0.5 21.0±0.5 60.0±1.0 2512 7” reel for 12 mm tape 13.8±0.5 178±2.0 2.0±0.5 13.5±0.5 21.0±0.5 60.0±1.0 IT'S NOT UNDER CONTROL FOR PDF FILE PLS NOTE THE VERSION STATED.. Do not copy without permission Issue Dep.DATA Center. 60 Series No. RALEC 旺詮 LRH Series Metal Alloy Low-Resistance Resistor Product Specifications Document No. Released Date Page No. IE-SP-089 2021/05/13 13 10 Technical application notes: (This is for recommendation, please customer perform adjustment according to actual application) 10.1 Recommend soldering method: 10.1.1 This product is applicable to IR-reflow process only.(Infrared Reflow) Typical examples of soldering processes that provides reliable joints without any damage are given in below: Time (Sec) Recommended IR Reflow Soldering Profile MEET J-STD-020D Recommended double-wave Soldering Profile Typical values (solid line) Process limits (dotted line) 10.1.2 Soldering Iron: temperature 350℃±10℃ , dwell time shall be less than 3 sec. Remark IT'S NOT UNDER CONTROL FOR PDF FILE PLS NOTE THE VERSION STATED.. Do not copy without permission Issue Dep.DATA Center. 60 Series No. RALEC 旺詮 LRH Series Metal Alloy Low-Resistance Resistor Product Specifications Document No. Released Date Page No. IE-SP-089 2021/05/13 14 10.2 Recommend Land Pattern: When a component is soldered, the resistance after soldering changes slightly depending on the size of the soldering area and the amount of soldering. When designing a circuit, it is necessary to consider the effect of a decrease or increase in its resistance. Type Power Rating (Watts) Resistance Range (mΩ) a Dimensions - in millimeters b i 0.65 0.50 0.50 1.00 1.45 1.65 1.65 1.65 1.27 1.78 2.18 2.18 2.18 0.50 0.66 0.60 0.90 1.00 2.11 3.68 3.18 1.5 0402 0.20 3≦R≦4 5 10 0603 0805 0.33 0.50 1206 0.50 1.00 1 ~ 24 1~19 1≦R＜3 2512 Remark 3≦R＜4 4≦R≦21 1.50 3~100 2.00 3 ~ 70 3.00 3 ~ 10 IT'S NOT UNDER CONTROL FOR PDF FILE PLS NOTE THE VERSION STATED.. Do not copy without permission Issue Dep.DATA Center. 60 Series No. RALEC 旺詮 LRH Series Metal Alloy Low-Resistance Resistor Product Specifications Document No. Released Date Page No. IE-SP-089 2021/05/13 15 10.3 Recommend dispensing method (for LRH2512) 10.3.1 The structure of RALEC metal alloy resistor that both side of main body would be thinner due to process factor (as the photo below). 10.3.2 When customer performs wave solder process shall take note on the dispensing gap. If the gap between two dispensing is over, the red-glue will not adhesive the resistor body and be dropped out (as photo 1). Therefore, we suggest customer to narrow down the dispenser gap (as photo 2), or dispenser on the body center (as photo 3) Photo 1 Photo 2 Photo 3 10.4 Product warranted solder area TOP SIDE BOTTOM Solder coverage could be over 95% Remark IT'S NOT UNDER CONTROL FOR PDF FILE PLS NOTE THE VERSION STATED.. Do not copy without permission Issue Dep.DATA Center. 60 Series No. RALEC 旺詮 LRH Series Metal Alloy Low-Resistance Resistor Product Specifications Document No. Released Date Page No. IE-SP-089 2021/05/13 16 10.5 Environment Precautions: This specification product is for general electronic use, RALEC will not be responsible for any damage, cost or loss caused by using this specification product in any special environment. If other applications need to confirm with RALEC. If consumer intends to use our Company product in special environment or condition (including but not limited to those mentioned below), then will need to make individual recognition of product features and reliability accordingly. (a) Used in high temperature and humidity environment (b) Exposed to sea breeze or other corrosive gas, such as Cl 2、H 2 S、NH 3、SO 2 and NO 2. (c) Used in non-verified liquids including water, oil, chemical and organic solvents. (d) Using non-verified resin or other coating material to seal or coat our Company product. (e) After soldering, it is necessary to use water-soluble detergents to clean residual solder fluxes, even though no-clean fluxes are recommended. 10.6 Momentary Overload Precautions: The product might be out of function when momentary overloaded. Please make sure to avoid momentary overloading while using and preserving. 10.7 Operation and Processing Precautions: (a) Avoid damage to the edge of resistor and protective layer caused by mechanical stress. (b) Handle with care when printing circuit board (PCB) is divided or fixed on support body, because bending of printing circuit board (PCB) mounting will make mechanical stress for resistors. (c) Make sure the power rating is under the limit when using the resistor. When power rating is over the limit, the resister will be overloaded. There might be machinery damage due to the climbing temperature. (d) If the resister will be exposed under massive impact load (shock wave) in a short period of time, the working environment must be set up well before use. (e) Please make evaluation and confirmation when the product is well used in your company and have a through consideration of it’s fail-safe design to ensure the system safety. Remark IT'S NOT UNDER CONTROL FOR PDF FILE PLS NOTE THE VERSION STATED.. Do not copy without permission Issue Dep.DATA Center. 60 Series No. RALEC 旺詮 LRH Series Metal Alloy Low-Resistance Resistor Product Specifications Document No. Released Date Page No. IE-SP-089 2021/05/13 17 11 Storage and transportation requirement: 11.1 The temperature condition must be controlled at 25±5℃, the R.H. must be controlled at 60±15%. The stock can maintain quality level in two years。 11.2 Please avoid the mentioned harsh environment below when storing to ensure product performance and its’ weldability. Places exposed to sea breeze or other corrosive gas, such as Cl2、H2S、NH3、SO2 and NO2. 11.3 When the product is moved and stored, please ensure the correct orientation of the box. Do not drop or squeeze the box. Otherwise, the electrode or the body of the product may be damaged. 12 Inductance Inductance characteristics: