The QMJ20H24S5 from Calex Manufacturing is a DC to DC Converter with Input Voltage 9 to 36 V, Output Voltage 1 5 V, Output Current 1 4000 mA, Output Power 20 W, Isolation Voltage 1.5 kV. Tags: Through Hole, Buck/Step down. More details for QMJ20H24S5 can be seen below.