Inrush Current Limiter Circuit

Posted on Jan 28, 2013

Q1 is an npn Darlington and Q2 is a prip Darlington. MOV1 is a metal-oxide varistor and R8 is an thermistor for limiting inrush current. This circuit limits ac line current to a load. When a predetermined interval has passed, RY1 shorts out thermistor or resistance RB. R4 can be 150 kQ if R9 is not used. If power is removed,

Inrush Current Limiter Circuit
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the circuit is ready for immediate restart.

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