Bidirectional Zener TVS — 1500 W peak pulse in a DO-214AB
The Panjit 1.5SMC18CA_R1_00001 is a bidirectional Zener transient-voltage-suppression diode from the 1.5SMC series, housed in a DO-214AB (SMC) surface-mount package. Rated for 1500 W (1.5 kW) peak pulse power, this part handles surge events on general-purpose power and signal lines where bidirectional protection is needed — the single chip covers both polarities, saving a diode pair and board space.
For a 15.3 V rail, that is a 65 % overshoot — well within the typical 30 V abs-max of downstream 24 V-tolerant ICs, but tight for a 12 V-rated part. The 17.1 V minimum breakdown ensures the diode does not conduct during normal rail ripple. The 1500 W rating is the product of clamp voltage and peak current at the stated waveform — not a continuous dissipation figure. In a repetitive surge environment, derate based on the pulse train duty cycle and the 150 °C maximum junction temperature.
Package and board-fit — DO-214AB (SMC) surface mount
The DO-214AB (SMC) package is a standard surface-mount footprint for TVS diodes in the 1500 W class. No power-line protection feature is built in — this is a pure transient clamp, not a filter.