Product Overview
The W Series Wirewound Power Resistor is designed for high-power 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 flammability requirements. They are suitable for use in smart meters, renewable energy systems, industrial equipment, power supplies/chargers, lighting, instruments/gauges, and white goods.
Product Attributes
- Product Series: W Series
- Type: Wirewound Power Resistor
- Core Material: Low thermal resistant ceramic core
- Lead Wire Material: Tin-plated copper wire
- Coating Material: Meets UL 94V-0 requirements
- Compliance: RoHS compliant* (Directive 2015/863)
- 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 | |||
| 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 >10 for 1 minute. | |||
| Load Life (Humidity) | 40 2 C, 90 to 95 %. 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 | Bulk in Box | 25 / 200 | 2,000 | |
| W9M | Bulk in Box | 25 / 200 | 2,000 | |
| W10M | Bulk in Box | 25 / 200 | 2,000 | |
| Popular Resistance Values | ||||
| Code | R Value | |||
| 15R0 | 15 | |||
| 22R0 | 22 | |||
| 33R0 | 33 | |||
| 39R0 | 39 | |||
| 47R0 | 47 | |||
| 56R0 | 56 | |||
| 82R0 | 82 | |||
| 1000 | 100 | |||
| 1200 | 120 | |||
| 1500 | 150 | |||
| Other E24 resistance values available upon request. | ||||
| How to Order | ||||
| Format | W [Power Rating] [Pin Style] [Resistance Code] [Tolerance] | |||
| Example | W3M22R0J | |||
| Product Series | W | |||
| 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) |
| Larger body size available upon request. | ||||
| Power Derating Curve | ||||
| The curve shows Percent Rated Load (%) vs. Ambient Temperature (C). Values range from 0% at -55C to 100% at 70C, then derating to 0% at 200C. | ||||
| Typical Part Marking | ||||
| Resistors shall be marked with color coding in accordance with 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.
2411061753_BOURNS-W3M39R0J_C3495192.pdf
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