T PL IA N M CO *R oH S Features Applications ■ Surge withstand IEC 61000-4-5 1.2/50 µs ■ Smart meters ■ Low thermal resistant ceramic core ■ Renewable energy ■ E24 resistance values ■ Industrial ■ RoHS compliant* ■ Power supplies/chargers ■ Wide power range (1~8 W) ■ Lighting ■ Coating material meets UL 94V-0 ■ Instruments/gauges requirements ■ White goods WS Series High Surge Withstand Wirewound Resistor Electrical Characteristics How to Order Resistance Range ................................................ See Popular Resistance Values Table Power Rating @ 70 °C WS1M, WS1A ........................................................................................................1 W WS2M, WS2A ........................................................................................................2 W WS3M, WS3A ........................................................................................................3 W WS5M, WS5A ........................................................................................................5 W WS7M, WS7A ........................................................................................................7 W WS8M ....................................................................................................................8 W Tolerance ....................................................................................................................5 % Operating Temperature.........................................................................-55 °C to +200 °C Temperature Coefficient .............................................................................. ±200 ppm/°C Maximum Voltage .................................................................................................... √ P * R Popular Resistance Values Code 15R0 20R0 22R0 33R0 47R0 R Value Code R Value 15 Ω 20 Ω 22 Ω 33 Ω 47 Ω 68R0 1500 1001 3301 68 Ω 150 Ω 1K Ω 3.3K Ω Other E24 resistance values available upon request. WS 3 M 22R0 J Product Series WS = Wirewound, High Surge Withstand Power Rating 1 = 1 Watt 2 = 2 Watts 3 = 3 Watts 5 = 5 Watts 7 = 7 Watts 8 = 8 Watts Pin Style A = Axial Standard Version M = Axial Miniaturized Version Resistance Code • R<100 ohms: “R” represents decimal point (example: 22R0 = 22 ohms) • R≥100 ohms: First three digits are significant, fourth digit represents number of zeros to follow (example: 1001 = 1K ohms) Resistance Tolerance J = ±5 % Physical Characteristics Resistor .................................................................... Low thermal resistant ceramic core Lead Wire ......................................................................................Tin-plated copper wire Coating Material ............................................................... Meets UL 94V-0 requirements Environmental Characteristics Test Conditions Specification Short Time Overload 10 times rated power for 5 seconds. ΔR≤±(5 % ± 0.05 Ω) Solderability 245 ±3 °C for 2.5 ±0.5 seconds. Over 95 % coverage Resistance to Solder Heat 260 ±5 °C for 10 ± 1 seconds. ΔR≤±(1 % + 0.05 Ω) Temperature Cycle 5 cycles, -55 °C ±3 °C for 30 minutes, Room temperature for 15 minutes, +155 ±2°C for 30 minutes, Room temperature for 15 minutes ΔR≤±(2 % + 0.05 Ω) Dielectric Strength Test voltage >500 Vrms for >1 minute. Pass Insulation Resistance Test voltage >500 Vrms for 1 minute. >109 Ω Load Life Humidity Rated continuous voltage for 1000 hours, 1.5 hours ON and 0.5 hours OFF at 90~95 % relative humidity and test temperature of 40 °C ±2 °C. ΔR≤ ±(5 % + 0.05 Ω) Load Life Rated continuous voltage for 1000 hours, 1.5 hours ON and 0.5 hours OFF at a test temperature of 70 °C ±2 °C. 1000 hours at rated power. ΔR≤±(5 % + 0.05 Ω) Surge IEC 61000-4-5 1.2/50 μs exponential. ΔR≤ ±(5 % + 0.05 Ω) *RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011. Specifications are subject to change without notice. The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time. Users should verify actual device performance in their specific applications. WS Series High Surge Withstand Wirewound Resistor Product Dimensions Typical Part Marking W L Resistors shall be marked with color coding. Colors shall be in accordance with JIS C 0802. W D T (DIA.) DIMENSIONS: MM (INCHES) 1st Significant Figure 2nd Significant Figure Dimensions Multiplier Model D W T WS1M 9.5 ± 1.0 (.374 ± .004) 4.5 ± 1.0 (.177 ± .004) 28.0 ± 3.0 (1.102 ± .118) 0.65 ± 0.05 (.026 ± .002) WS1A 11.5 ± 1.0 (.453 ± .004) 5.0 ± 1.0 (.197 ± .004) 28.0 ± 3.0 (1.102 ± .118) 0.65 ± 0.05 (.026 ± .002) WS2M WS2A WS3M 11.5 ± 1.0 (.453 ± .004) 15.5 ± 1.0 (.610 ± .004) 15.5 ± 1.0 (.610 ± .004) 5.0 ± 1.0 (.197 ± .004) 5.5 ± 1.0 (.217 ± .004) 5.5 ± 1.0 (.217 ± .004) 28.0 ± 3.0 (1.102 ± .118) 28.0 ± 3.0 (1.102 ± .118) 28.0 ± 3.0 (1.102 ± .118) 0.65 ± 0.05 (.026 ± .002) 0.75 ± 0.05 (.030 ± .002) 0.75 ± 0.05 (.030 ± .002) WS3A 17.5 ± 1.0 (.689 ± .004) 6.5 ± 1.0 (.256 ± .004) 28.0 ± 3.0 (1.102 ± .118) 0.75 ± 0.05 (.030 ± .002) WS5M 17.5 ± 1.0 (.689 ± .004) 6.5 ± 1.0 (.256 ± .004) 28.0 ± 3.0 (1.102 ± .118) 0.75 ± 0.05 (.030 ± .002) WS5A 24.5 ± 1.0 (.965 ± .004) 8.5 ± 1.0 (.335 ± .004) 38.0 ± 3.0 (1.496 ± .118) 0.75 ± 0.05 (.030 ± .002) WS7M 24.5 ± 1.0 (.965 ± .004) 8.5 ± 1.0 (.335 ± .004) 38.0 ± 3.0 (1.496 ± .118) 0.75 ± 0.05 (.030 ± .002) WS7A 29.5 ± 1.0 (1.161 ± .004) 8.5 ± 1.0 (.335 ± .004) 38.0 ± 3.0 (1.496 ± .118) 0.75 ± 0.05 (.030 ± .002) WS8M 29.5 ± 1.0 (1.161 ± .004) 8.5 ± 1.0 (.335 ± .004) 38.0 ± 3.0 (1.496 ± .118) 0.75 ± 0.05 (.030 ± .002) Tolerance 1st Band 2nd Band Multiplier Black 0 0 1Ω Brown 1 1 10 Ω ±1 % Red 2 2 100 Ω ±2 % Orange 3 3 1K Ω Yellow 4 4 10K Ω Green 5 5 100K Ω ±0.5 % Blue 6 6 1M Ω ±0.25 % Violet 7 7 10M Ω ±0.10 % Grey 8 8 White 9 9 Color Tol. ±0.05 % Gold 0.1 Ω ±5 % Silver 0.01 Ω ±10 % Power Derating Curve 120 Percent Rated Load (%) L* 100 80 60 40 20 0 -55 0 50 70 100 150 200 250 275 300 Ambient Temperature (°C) Specifications are subject to change without notice. The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time. Users should verify actual device performance in their specific applications. 3312Series - 2 mm SMD Trimming WS High Surge WithstandPotentiometer Wirewound Resistor Packaging Specifications O C T 6±1 P B Z = 1.0 MM (INCHES) DIMENSIONS: A t L1 S Model L2 O P A B C WS1M 58 ± 1 (2.283 ± .039) 5 ± 0.3 (.197 ± .012) 75 ± 5 (2.953 ± .197) 70 ± 5 (2.756 ± .197) 255 ± 5 (10.039 ± .197) WS1A, WS2M 58 ± 1 (2.283 ± .039) 5 ± 0.3 (.197 ± .012) 80 ± 5 (3.150 ± .197) 82 ± 5 (3.228 ± .197) 255 ± 5 (10.039 ± .197) WS2A, WS3M 65 ± 5 (2.559 ± .197) 10 ± 0.5 (.394 ± .020) 90 ± 5 (3.543 ± .197) 119 ± 5 (4.685 ± .197) 255 ± 5 (10.039 ± .197) WS3A, WS5M 65 ± 5 (2.559 ± .197) 10 ± 0.5 (.394 ± .020) 90 ± 5 (3.543 ± .197) 88 ± 5 (3.465 ± .197) 255 ± 5 (10.039 ± .197) WS5A, WS7M 90 ± 5 (3.543 ± .197) 10 ± 0.5 (.394 ± .020) 115 ± 5 (4.528 ± .197) 124 ± 5 (4.882 ± .197) 500 ± 5 (19.685 ± .197) Pkg. Style Min. Order Qty. (Pcs.) Pcs./ Box 5,000 1,000 2,000 500 Ammo Pack For WS7A and WS8M packaging specifications, please contact factory. Surge Performance - 1.2/50 µs Pulse Withstanding Curve WS7A, WS8M WS5A, WS7M 10000 Pulse Voltage (V) WS3A, WS5M WS2A, WS3M WS1A, WS2M WS1M Asia-Pacific: Tel: +886-2 2562-4117 Fax: +886-2 2562-4116 EMEA: Tel: +36 88 520 390 Fax: +36 88 520 211 The Americas: Tel: +1-951 781-5500 Fax: +1-951 781-5700 www.bourns.com 1000 10 100 1000 Value (Ohms) 10000 08/15 Specifications are subject to change without notice. The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time. Users should verify actual device performance in their specific applications.