capacitor blown
capacitor blown
(OP)
i have relay that drives a inductive load of .6mH. The output of the relay also has a capacitor of 100n to ground.
i have noticed that after serveral switching the capacitor is blown (shorted)?
do you what could be causing this and why?
i have noticed that after serveral switching the capacitor is blown (shorted)?
do you what could be causing this and why?





RE: capacitor blown
Barry1961
RE: capacitor blown
RE: capacitor blown
Is this AC or DC?
Can you give a little more detail on the circuit? Voltage, components….
Barry1961
RE: capacitor blown
in an inductor, the current cant stop instanteously, so who is suppling the current when the relay contacts open?
RE: capacitor blown
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One day my ship will come in.
But with my luck, I'll be at the airport!
RE: capacitor blown
That attempt to suddenly stop the current flow is what generates a large voltage transient. If you can, you would be better off to place a diode across the inductor (called a freewheeling or flywheel diode) to suppress the voltage spikes. The diode should have a forward voltage rating of at least the maxmium voltage (preferably higher) of the circuit, and a minimum continuous rating of six amperes. This diode will allow the current to decrease based on the L/R time constant of the inductor. It should also minimize the arcing at the relay contacts. As the circuit response will be slower, make certain that the addition of this diode does not compromise any safety aspect of the circuit.
Hope this helps,
Raisinbran