12 Volt 40 Amp Power Supply Circuit Diagram. It has short circuit protection thermal overload protection. Part list psf14a20d 20 amp bdx33 based power supply.
The base current is about 138 ma per transistor. Using a single 7812 ic voltage regulator and multiple outboard pass transistors this power supply can deliver output load currents of up to 30 amps. At the output the total load current is 30 amps the regulator supplies 0 866 a and the 6 transistors 4 855 amp each 30 6 4 855 0 866.
F1 3 18 amp.
It has short circuit protection thermal overload protection. This is a power supply circuit diagram of 40volts that is able to deliver 2a current. And i highly recommend this high current power supply circuit. This circuit is based on ic lm7812 it is a 3 terminal ve voltage regulator ic.
