Welwyn 680 mΩ Wirewound Resistor 3 W 5 %
- RS Stock No.:
- 139-3394
- Mfr. Part No.:
- W21-R68JI
- Brand:
- Welwyn
Bulk discount available
Subtotal (1 bag of 5 units)*
£8.15
(exc. VAT)
£9.80
(inc. VAT)
FREE delivery for orders over £50.00
In Stock
- 70 unit(s) ready to ship
- Plus 75 unit(s) ready to ship from another location
- Plus 605 unit(s) shipping from 17 February 2026
Need more? Click ‘Check delivery dates’ to find extra stock and lead times.
Units | Per unit | Per Bag* |
|---|---|---|
| 5 - 95 | £1.63 | £8.15 |
| 100 - 245 | £1.048 | £5.24 |
| 250 - 495 | £0.892 | £4.46 |
| 500 + | £0.844 | £4.22 |
*price indicative
- RS Stock No.:
- 139-3394
- Mfr. Part No.:
- W21-R68JI
- 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 | 680mΩ | |
| Product Type | Resistor | |
| Resistor Type | Wirewound | |
| Power Rating | 3W | |
| Tolerance ± | 5% | |
| Packaging | Ammo Pack | |
| Axial/Radial | Axial | |
| Voltage | 100 V | |
| Technology | Wirewound | |
| Series | W20 | |
| Automotive Standard | No | |
| Package/Case | 1000 | |
| Minimum Operating Temperature | -55°C | |
| Maximum Operating Temperature | 200°C | |
| Standards/Approvals | IEC, RoHS | |
| Diameter | 5.6 mm | |
| Length | 12.7mm | |
| Temperature Coefficient | ±200 ppm/°C | |
| Lead Diameter | 0.8mm | |
| Select all | ||
|---|---|---|
Brand Welwyn | ||
Resistance 680mΩ | ||
Product Type Resistor | ||
Resistor Type Wirewound | ||
Power Rating 3W | ||
Tolerance ± 5% | ||
Packaging Ammo Pack | ||
Axial/Radial Axial | ||
Voltage 100 V | ||
Technology Wirewound | ||
Series W20 | ||
Automotive Standard No | ||
Package/Case 1000 | ||
Minimum Operating Temperature -55°C | ||
Maximum Operating Temperature 200°C | ||
Standards/Approvals IEC, RoHS | ||
Diameter 5.6 mm | ||
Length 12.7mm | ||
Temperature Coefficient ±200 ppm/°C | ||
Lead Diameter 0.8mm | ||
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
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