3W WELWYN W21 Series 5% Vitreous Enamel Wirewound Resistor All Values Multi-Qty

Sale Multiple:- 1, 2, 5, 10, 20, 50, 100

Vitreous Enamelled Wirewound Resistors W20 Series

•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

Power at 70°C 2.5W
Power at 25°C 3W
Resistance Tolerance ±5%
Temperature Coefficient ±75 ppm/°C
Operating Temperature -55°C → +350°C
Limiting Element Voltage 100V
Body Length 12.7 mm
Body Diameter 5.6 mm
Lead Length 22.75 mm
Lead Diameter 0.8 mm

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.

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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