W Series Wirewound Power Resistor
The W Series Wirewound Power Resistor features a low thermal resistant ceramic core and E24 resistance values, offering a wide power range from 1 to 10 Watts. Designed for reliability, its coating material meets UL 94V-0 requirements. This RoHS compliant series is suitable for demanding applications including smart meters, renewable energy systems, industrial equipment, power supplies/chargers, lighting, instruments/gauges, and white goods.
- Brand: Bourns
- Product Series: W Series
- Construction: Wirewound
- Core Material: Low thermal resistant ceramic
- Lead Wire Material: Tin-plated copper wire
- Coating Material: Meets UL 94V-0 requirements
- Compliance: RoHS compliant (Directive 2015/863)
- Resistance Values: E24 series, other values available upon request
- Non-inductive version: Available upon request
Technical Specifications
| Specification | Details |
|---|---|
| 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 |
| Short Time Overload | 2.5 times rated voltage for 5 seconds; R/R(2 % 0.05 ) |
| 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) | 1000 hours at rated power (1.5 hours ON, 0.5 hours OFF) at 40 2 C, 90 to 95 % RH; R/R (5 % + 0.05 ) |
| Load Life | 1000 hours at rated power (1.5 hours ON, 0.5 hours OFF) at 70 2 C; R/R(5 % + 0.05 ) |
Models & Packaging
| Model | Power Rating | Qty. per Box (Pcs.) | Min. Order Quantity (Pcs.) | Packaging Style |
|---|---|---|---|---|
| W1M | 1 Watt | 1,000 | 5,000 | Ammo Pack |
| W2M | 2 Watts | 500 | 2,000 | Ammo Pack |
| W3M | 3 Watts | 500 | 2,000 | Ammo Pack |
| W5M | 5 Watts | 500 | 2,000 | Ammo Pack |
| W7M | 7 Watts | 500 | 2,000 | Ammo Pack |
| W9M | 9 Watts | 25 / 200 | 2,000 | Bulk in Box |
| W10M | 10 Watts | 25 / 200 | 2,000 | Bulk in Box |
Popular Resistance Values
| Code | R Value | Code | R Value |
|---|---|---|---|
| 15R0 | 15 | 56R0 | 56 |
| 22R0 | 22 | 82R0 | 82 |
| 33R0 | 33 | 1000 | 100 |
| 39R0 | 39 | 1200 | 120 |
| 47R0 | 47 | 1500 | 150 |
How to Order Example
W 3 M 22R0 J
- Product Series: W
- Power Rating: 3 = 3 Watts
- Pin Style: M = Axial Miniaturized Version
- Resistance Code: 22R0 = 22
- Resistance Tolerance: J = 5 %
Dimensions
| Model | L (mm/in) | D (mm/in) | W (mm/in) | T (DIA.) (mm/in) |
|---|---|---|---|---|
| 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) |
Additional Information
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-W3M1000J_C6025286.pdf
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