T PL IA N M CO *R oH S Features Applications ■ Low thermal resistant ceramic core ■ Smart meters ■ E24 resistance values ■ Renewable energy ■ RoHS compliant* ■ Industrial ■ Wide power range (1~10 W) ■ Power supplies/chargers ■ Coating material meets UL 94V-0 ■ Lighting requirements ■ Instruments/gauges ■ White goods W Series Wirewound Power Resistor Electrical Characteristics How to Order Resistance Range ................................................ See Popular Resistance Values Table Tolerance ....................................................................................................................5 % Operating Temperature.........................................................................-55 °C to +200 °C Temperature Coefficient .............................................................................. ±300 ppm/°C Maximum Voltage .................................................................................................... √ P * R Non-inductive version is available upon request. Popular Resistance Values Code R Value Code R Value 15R0 15 Ω 56R0 56 Ω 22R0 22 Ω 82R0 82 Ω 33R0 33 Ω 1000 100 Ω 39R0 39 Ω 1200 120 Ω 47R0 47 Ω 1500 150 Ω Other E24 resistance values available upon request. Physical Characteristics Resistor .................................................................... Low thermal resistant ceramic core Lead Wire ......................................................................................Tin-plated copper wire Coating Material ............................................................... Meets UL 94V-0 requirements W 3 M 22R0 J Product Series W = Wirewound Power Rating 1 = 1 Watt 2 = 2 Watts 3 = 3 Watts 5 = 5 Watts 7 = 7 Watts 9 = 9 Watts 10 = 10 Watts Pin Style M = Axial Miniaturized Version Resistance Code • R<100 ohms: “R” represents decimal point (examples: 56R0 = 56 ohms) • R≥100 ohms: First three digits are significant, fourth digit represents number of zeros to follow (example: 1500 = 150 ohms) Resistance Tolerance J = ±5 % Packaging Specifications Model Environmental Characteristics Test Conditions Specification W1M Short Time Overload 2.5 times rated voltage for 5 seconds. ΔR/R≤±(2 % ± 0.05 Ω) W2M 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/R≤±(1 % + 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 40 ±2 °C, 90 to 95 %. 1.5 hours ON, 0.5 hours OFF for 1000 hours at rated power. ΔR/R≤ ±(5 % + 0.05 Ω) Load Life 70 ±2 °C. 1.5 hours ON, 0.5 hours OFF for 1000 hours at rated power. ΔR/R≤±(5 % + 0.05 Ω) Style Qty. per Box (Pcs.) Min. Order Quantity (Pcs.) Ammo Pack 1,000 5,000 Ammo Pack 500 2,000 Bulk in Box 25 / 200 2,000 W3M W5M W7M W9M W10M *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. W Series Wirewound Power 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 L* D W T W1M 9.5 ± 1.0 (.374 ± .004) 4.0 ± 1.0 (.157 ± .004) 28.0 ± 3.0 (1.102 ± .118) 0.60 ± 0.05 (.024 ± .002) W2M 11.5 ± 1.0 (.453 ± .004) 4.5 ± 1.0 (.177 ± .004) 28.0 ± 3.0 (1.102 ± .118) 0.65 ± 0.05 (.026 ± .002) W3M 15.5 ± 1.0 (.610 ± .004) 5.5 ± 1.0 (.217 ± .004) 28.0 ± 3.0 (1.102 ± .118) W5M 17.5 ± 1.0 (.689 ± .004) 6.5 ± 1.0 (.256 ± .004) W7M 24.5 ± 1.0 (.965 ± .004) W9M W10M Tolerance 1st Band 2nd Band Multiplier Black 0 0 1Ω 0.70 ± 0.05 (.028 ± .002) Brown 1 1 10 Ω ±1 % Red 2 2 100 Ω ±2 % 28.0 ± 3.0 (1.102 ± .118) 0.75 ± 0.05 (.030 ± .002) Orange 3 3 1K Ω Yellow 4 4 10K Ω 8.5 ± 1.0 (.335 ± .004) 38.0 ± 3.0 (1.496 ± .118) 0.75 ± 0.05 (.030 ± .002) Green 5 5 100K Ω ±0.5 % Blue 6 6 1M Ω ±0.25 % 39.5 ± 1.0 (1.555 ± .004) 8.5 ± 1.0 (.335 ± .004) 38.0 ± 3.0 (1.496 ± .118) 0.75 ± 0.05 (.030 ± .002) Violet 7 7 10M Ω ±0.10 % Grey 8 8 52.5 ± 1.0 (2.067 ± .004) 8.5 ± 1.0 (.335 ± .004) 38.0 ± 3.0 (1.496 ± .118) 0.75 ± 0.05 (.030 ± .002) White 9 9 Color Tol. ±0.05 % Gold 0.1 Ω ±5 % Silver 0.01 Ω ±10 % * Larger body size available upon request. Power Derating Curve Percent Rated Load (%) 120 100 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. 3312 - 2 mm SMD Trimming Potentiometer W Series Wirewound Power Resistor Packaging Specifications O C T 6±1 P B Z = 1.0 DIMENSIONS: MM (INCHES) t A S L1 L2 Model O P A B C Qty./Box W1M 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) 1,000 pcs. W2M 58 ± 1 (2.283 ± .039) 10 ± 0.5 (.394 ± .020) 80 ± 5 (3.150 ± .197) 82 ± 5 (3.228 ± .197) 255 ± 5 (10.039 ± .197) 1,000 pcs. W3M 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) 1,000 pcs. W5M 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) 500 pcs. W7M 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) 500 pcs. For W9M and W10M packaging specifications, please contact factory. 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 07/15 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.