Details：

PCB size: 9.3 * 8.2cm Using NE555 time base chip circuit, All in-line resistors use 5-ring precision resistors, high-power thermistors Principle of delayed anti-shock start-up power supply: Turn on the (AC220V IN) power supply, and one of the 30A relays will be closed after short-circuiting the control terminal. Power on! This kit sets the delay time to 3-4 seconds! Relay rated current is 30A Large currents are routed at the top and bottom. Power supply one input, two output 2 sets of temperature control switch terminals, 1 set of tactile switch terminals 1 set of self-locking switch terminals

The main function:

1: Suppresses the inrush current at the moment of power-on. Due to the high power of Class A and high-power amplifier transformers, the extremely low load impedance, and the large capacity of the power supply filter capacitor, the excessive current at the power-on moment of power-on of the power amplifier can easily damage the rectifier bridge and filter capacitor 2: No high-power switch is required to control, only low-power switch control is required (small-power self-locking switches and tact switches are all available)

Note for soft start board installation:

1: The self-locking switch and tact switch of this soft starter board are compatible. If using a self-locking switch (tap the switch terminal to short with a wire connection) If using a tact switch (the self-locking switch terminals should be shorted with a wire connection) 2: Temperature control switch type (normally open), no need to connect short circuit temperature controller socket without using temperature controller This power soft start board uses two-color LED to emit light, LED is red when standby LED is green after extended work. Only support AC200V/AC220V /AC230V/AC240V input ，not support AC 100V/AC115V/AC120V input