About the 0-51378-19
The 0-51378-19 is a small Gate Coupling card manufactured by Reliance Electric. The circuit board is very small and is composed of one transformer in the center of the circuit board with three resistors, three diodes, and four metal pins. The side of the gate coupling card that has just a single diode and a single resistor on it has the following markings by the transformer and the resistor it is labeled X2, by the transformer and the diode it is labeled X1. The diode is 1REC. The two pins on this side are labeled G (W), K (R), and in between the pins, it says THY. On the side of the transformer that has two resistors and two diodes, it’s labeled H2, H1 at the edge of the transformer. The diode near the transformer is labeled 2 REC, the other diode is labeled 3 REC. The other two pins are labeled H1 (R), and H2 (W). The circuit board also has two holes with metal inlays one on either side of the transformer to secure the circuit board.
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