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Inrush current limiter circuit diagram

Source: InternetPublisher:fish001 Keywords: Circuit diagram controller circuit surge current thermistor Updated: 2021/04/29

Q1 is an NPN Darlington tube and Q2 is a plug-and-play Darlington tube. MOV1 is a metal oxide varistor and R8 is an NTC thermistor that limits inrush current . This circuit limits the AC line to the load and when a predetermined time interval has elapsed, RY1 shorts the thermistor or resistor RB. If R9 is not used, R4 is 150kΩ. If power is removed, the circuit is ready for an immediate restart.

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