Product Overview
The W Series Wirewound Power Resistor is designed for demanding applications, featuring a low thermal resistant ceramic core and E24 resistance values. These RoHS compliant resistors offer a wide power range from 1 to 10 Watts and a coating material that meets UL 94V-0 requirements. Ideal for use in smart meters, renewable energy systems, industrial equipment, power supplies/chargers, lighting, instruments/gauges, and white goods, the W Series provides reliable performance.
Product Attributes
- Product Series: W Series
- Product Type: Wirewound Power Resistor
- Brand: Bourns
- Certifications: RoHS Compliant* (Directive 2015/863, Mar 31, 2015 and Annex)
- Coating Material: Meets UL 94V-0 requirements
- Core Material: Low thermal resistant ceramic core
- Lead Wire Material: Tin-plated copper wire
- Non-inductive version: Available upon request
Technical Specifications
| Specification | Details | |||||
|---|---|---|---|---|---|---|
| Resistance Range | See Popular Resistance Values Table (Other E24 values available upon request) | |||||
| Tolerance | 5 % | |||||
| Operating Temperature | -55 C to +200 C | |||||
| Temperature Coefficient | 300 ppm/C | |||||
| Maximum Voltage | P*R | |||||
| Environmental Characteristics Test Conditions | ||||||
| Short Time Overload | 2.5 times rated voltage; R/R(2 % 0.05 ) for 5 seconds. | |||||
| Solderability | 245 3 C for 2.5 0.5 seconds; Over 95 % coverage | |||||
| Resistance to Solder Heat | 260 5 C for 10 1 seconds; R/R(1 % + 0.05 ) | |||||
| Dielectric Strength | Test voltage >500 Vrms for >1 minute; Pass | |||||
| Insulation Resistance | Test voltage >500 Vrms for 1 minute; >109 | |||||
| Load Life (Humidity) | 40 2 C, 90 to 95 % RH; 1.5 hours ON, 0.5 hours OFF for 1000 hours at rated power; R/R (5 % + 0.05 ) | |||||
| Load Life | 70 2 C; 1.5 hours ON, 0.5 hours OFF for 1000 hours at rated power; R/R(5 % + 0.05 ) | |||||
| Packaging Specifications | ||||||
| Model | Style | Qty. per Box (Pcs.) | Min. Order Quantity (Pcs.) | |||
| W1M | Ammo Pack | 1,000 | 5,000 | |||
| W2M | Ammo Pack | 500 | 2,000 | |||
| W3M | Ammo Pack | 500 | 2,000 | |||
| W5M | Ammo Pack | 500 | 2,000 | |||
| W7M | Ammo Pack | 500 | 2,000 | |||
| W9M | Bulk in Box | 25 / 200 | 2,000 | |||
| W10M | Bulk in Box | 25 / 200 | 2,000 | |||
| Popular Resistance Values | Code | R Value | ||||
| R<100 | 15R0 | 15 | ||||
| 22R0 | 22 | |||||
| 33R0 | 33 | |||||
| 39R0 | 39 | |||||
| 47R0 | 47 | |||||
| R<100 | 56R0 | 56 | ||||
| 82R0 | 82 | |||||
| R100 | 1000 | 100 | ||||
| 1200 | 120 | |||||
| 1500 | 150 | |||||
| How to Order Example | W 3 M 22R0 J | |||||
| Product Series | W | Wirewound | ||||
| Power Rating | 1, 2, 3, 5, 7, 9, 10 Watts | |||||
| Pin Style | M = Axial Miniaturized Version | |||||
| Resistance Code | R<100 ohms: R represents decimal point (e.g., 56R0 = 56 ohms); R100 ohms: First three digits are significant, fourth digit represents number of zeros (e.g., 1500 = 150 ohms) | |||||
| Resistance Tolerance | J = 5 % | |||||
| Product Dimensions (MM / INCHES) | Model | L* | D | W | T (DIA.) | |
| W1M | 9.5 1.0 (.374 .039) | 3.0 1.0 (.118 .039) | 28.0 3.0 (1.102 .118) | 0.54 0.05 (.021 .002) | ||
| W2M | 11.5 1.0 (.453 .039) | 4.5 1.0 (.177 .039) | 28.0 3.0 (1.102 .118) | 0.70 0.05 (.028 .002) | ||
| W3M | 15.5 1.0 (.610 .039) | 5.5 1.0 (.217 .039) | 28.0 3.0 (1.102 .118) | 0.70 0.05 (.028 .002) | ||
| W5M | 17.5 1.0 (.689 .004) | 6.5 1.0 (.256 .039) | 28.0 3.0 (1.102 .118) | 0.75 0.05 (.030 .002) | ||
| W7M | 24.5 1.0 (.965 .039) | 8.5 1.0 (.335 .039) | 38.0 3.0 (1.496 .118) | 0.75 0.05 (.030 .002) | ||
| W9M | 39.5 1.0 (1.555 .039) | 8.5 1.0 (.335 .039) | 38.0 3.0 (1.496 .118) | 0.75 0.05 (.030 .002) | ||
| W10M | 52.5 1.0 (2.067 .039) | 8.5 1.0 (.335 .0039 | 38.0 3.0 (1.496 .118) | 0.75 0.05 (.030 .002) | ||
| Power Derating Curve | Shows Percent Rated Load (%) vs. Ambient Temperature (C) | |||||
| Color Coding (JIS C 0802) | Color | 1st Band | 2nd Band | Multiplier | Tol. | |
| Black | 0 | 0 | 1 | |||
| Brown | 1 | 1 | 10 | 1 % | ||
| Red | 2 | 2 | 100 | 2 % | ||
| Orange | 3 | 3 | 1K | |||
| Yellow | 4 | 4 | 10K | |||
| Green | 5 | 5 | 100K | 0.5 % | ||
| Blue | 6 | 6 | 1M | 0.25 % | ||
| Violet | 7 | 7 | 10M | 0.10 % | ||
| Grey | 8 | 8 | 0.05 % | |||
| White | 9 | 9 | ||||
| Gold | 0.1 | 5 % | ||||
| Silver | 0.01 | 10 % | ||||
*RoHS Directive 2015/863, Mar 31, 2015 and Annex. Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
2411041600_BOURNS-W5M82R0J_C3465524.pdf
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