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Welwyn W21 Series Axial Wirewound Resistor 3Ω ±5% 3W ±200ppm/°C

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Price Each (In a Pack of 5)

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Qty Unit Price
5 54.90 Rs
125 49.96 Rs
250 48.96 Rs
500 45.04 Rs
1250 42.79 Rs
In stock in the UK
(Order in multiples of 5)
  • RoHS Status
  • RS Stock No. 294-2940
  • Brand Welwyn
  • Mfr Part No. W21-3R0JI


Series W21
Tolerance ±5%
Power Rating 3W
Temperature Coefficient ±200ppm/°C
Termination Style Axial
Case Style Conformal
Technology Wire Wound
Dimensions 5.6 Dia. x 12.7mm
Diameter 5.6mm
Maximum Operating Temperature +200°C
Length 12.7mm
Minimum Operating Temperature -55°C
Maximum Temperature Coefficient +200ppm/°C
Minimum Temperature Coefficient -200ppm/°C
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W21 Series 2.5W, Axial

Power at 70°C2.5W
Power at 25°C3W
Resistance Tolerance±5%
Temperature Coefficient±75 ppm/°C
Operating Temperature-55°C → +350°C
Limiting Element Voltage100V
Body Length12.7 mm
Body Diameter5.6 mm
Lead Length22.75 mm
Lead Diameter0.8 mm

Vitreous Enamel, Axial - 2.5W to 14W

A range of high power resistors in small body sizes suitable for use in harsh environments. Their high stability and reliability make them particularly suitable for use in protection circuits.,The resistance wire element is wound onto a high purity ceramic substrate and employs an all welded cap and lead method of construction giving considerable strength and resistance to damage. The vitreous enamel protective coating is resistant to all normal PCB cleaning solvents.,Application note. Terminations should not be bent closer than 1.5mm from the body. Recommended minimum bend radius is 1mm. For full rated power dissipation terminations should not be soldered closer than 4mm from the body.,When cold, vitreous enamel has excellent insulation resistance; however the specific resistance decreases with increasing temperature. Therefore if the resistor is operating at or near maximum temperature it cannot be classed as insulating and should not be in contact with any conducting materials.

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RS Stock No.: 294-2940

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