Welwyn 56Ω Wire Wound Resistor 3W ±5% W21-56RJI
- RS Stock No.:
- 139-3388
- Mfr. Part No.:
- W21-56RJI
- Brand:
- Welwyn
Bulk discount available
Subtotal (1 bag of 5 units)*
£4.90
(exc. VAT)
£5.90
(inc. VAT)
FREE delivery for orders over £50.00
In Stock
- 560 unit(s) ready to ship
- Plus 1,040 unit(s) shipping from 06 November 2025
- Plus 1,000 unit(s) shipping from 05 March 2026
Need more? Click ‘Check delivery dates’ to find extra stock and lead times.
Units | Per unit | Per Bag* |
|---|---|---|
| 5 - 95 | £0.98 | £4.90 |
| 100 - 245 | £0.516 | £2.58 |
| 250 - 495 | £0.474 | £2.37 |
| 500 + | £0.434 | £2.17 |
*price indicative
- RS Stock No.:
- 139-3388
- Mfr. Part No.:
- W21-56RJI
- Brand:
- Welwyn
Specifications
Technical Reference
Legislation and Compliance
Product Details
Find similar products by selecting one or more attributes.
Select all | Attribute | Value |
|---|---|---|
| Brand | Welwyn | |
| Resistance | 56Ω | |
| Power Rating | 3W | |
| Tolerance | ±5% | |
| Technology | Wire Wound | |
| Series | W20 | |
| Temperature Coefficient | ±200ppm/°C | |
| Maximum Operating Temperature | +200°C | |
| Minimum Operating Temperature | -55°C | |
Select all | ||
|---|---|---|
Brand Welwyn | ||
Resistance 56Ω | ||
Power Rating 3W | ||
Tolerance ±5% | ||
Technology Wire Wound | ||
Series W20 | ||
Temperature Coefficient ±200ppm/°C | ||
Maximum Operating Temperature +200°C | ||
Minimum Operating Temperature -55°C | ||
As there is a maximum temperature to which the wire can rise during an overload, if the resistor is already dissipating heat, then the pulse energy applied should be less than that allowed by the graph. It should also be noted that for repetitive pulses the average power dissipated must not exceed the continuous power rating of the resistor.
CECC approved
Suitable for harsh environments
Impervious lead free vitreous enamel coating
Overload characteristics ideal for protection circuits
High stability and reliability
High power dissipation for size
Suitable for harsh environments
Impervious lead free vitreous enamel coating
Overload characteristics ideal for protection circuits
High stability and reliability
High power dissipation for size
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