This is the simple inrush current limiter circuit diagram. Q1 is an npn Darling-ton and Q2 is a prip Darling-ton. 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, ready for immediate restart.
Inrush Current Limiter Circuit Diagram
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