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Snubber Circuit Design 230V, 16A, Problem in small load, Current Flow!


Erjon Ameti

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Hello
We designed this Snubber Circuit with this varistor in parallel but we have a problem in a small load. Even when the relay is disconnected, a small current is flowing. For example, when connecting a phone charger, the phone screen keeps turning on and off.
The varistor is Hongzhi Elec 7D471K
The resistor is 2.2 ±5% 1W ±350ppm/°C Axial,3.3x9.2mm Carbon
The capacitor is 100nF ±10% 275VAC 10 Through Hole,P=10mm Suppression Capacitors

I think the problem is with the capacitor and maybe I need a smaller one to increase the impedance and limit the current flow or schematic problem.

 

snuber.jpg

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