2000W Amplifier Power Supply Soft Starting Board High Power for Audio Speaker Thunder Protection 220V

Specifications Relay RGL high power super large current 100A pure copper foot relaySize 95mmX58mmX30mm height ultra small sizeScope of Application Suitable for high end audio Speaker power input The power used is suitable within 3800W Long term load working power is recommended at around 2000WFeatures 1 The soft start er function is to reduce the inrush current at the moment of startup to reduce the impact of the machine on the grid and extend the life of the switch This board uses ultra high current 100A pure copper foot relay and 4 large thermistor NTC 20D 20 which effectively protects the machine and prevents excessive starting current 2 This board does not require an auxiliary power supply It has only 2 terminals one is connected to the power input before a switch control and one output is connected to the load which is very convenient to use Working Principle At the initial stage of power on the load is supplied through a thermistor with a negative temperature coefficient As the temperature of the thermistor rises the resistance decreases and the voltage rises slowly thereby effectively suppressing the impact of the surge current on the line and other electrical appliances Impact After about 2 seconds the relay pulls in adjustable pull in time see the picture for details short circuit the thermistor the power supply will directly supply power to the load through the relay contact and the load enters the normal working state Deto nat