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Thread: 2.5KW Load
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face BY : Roman Black email (remove spam text)



I do it in battery powered devices with a large capacitor
and resistor. The cap is BEFORE the relay's switching semi,
and connected to V+ by the resistor. On first turn on the
full voltage comes from the cap to pull-in the relay, and
as soon as the cap discharges the resistor provides enough
holding current. I normally aim for about 35% holding
current. Never had a problem with it. (also decouples
the supply from the relay back emf quite well) :o)
-Roman


Vasile Surducan wrote:
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