Welwyn 4.7kΩ Wire Wound Resistor 3W ±5% W21-4K7JI

View all Through Hole Resistors

Subtotal (1 box of 1000 units)*

£602.00

(exc. VAT)

£722.00

(inc. VAT)

Add to Basket
Select or type quantity
In Stock
  • 1,000 unit(s) ready to ship
  • Plus 1,000 unit(s) shipping from 26 February 2026
Need more? Click ‘Check delivery dates’ to find extra stock and lead times.
Units
Per unit
Per Box*
1000 +£0.602£602.00

*price indicative

RS Stock No.:
139-3275
Mfr. Part No.:
W21-4K7JI
Brand:
Welwyn
Find similar products by selecting one or more attributes.
Select all

Brand

Welwyn

Resistance

4.7kΩ

Power Rating

3W

Tolerance

±5%

Technology

Wire Wound

Series

W20

Maximum Operating Temperature

+200°C

Temperature Coefficient

±200ppm/°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. Using the formula below we can estimate the “equivalent” energy of a pulse applied to a resistor that is already dissipating power.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

Related links