1500W peak pulse power, 51V standoff, bidirectional clamp
The SMCJ51CE3/TR13 is a Zener-type TVS diode rated for 1500W peak pulse power (10/1000 µs waveform) with a reverse standoff voltage of 51V. It clamps transients to 91.1V maximum at the rated 18.5A peak pulse current. The single bidirectional channel handles both positive and negative surges, making it a one-component solution for AC or bipolar lines.
Minimum breakdown voltage is 56.7V, so the part starts conducting above that level. The 18.5A peak pulse current at 10/1000 µs gives the surge-handling capacity; derate for shorter or longer pulses per the datasheet curves.
Active production, surface-mount DO-214AB
Microchip lists this part as Active, so no imminent end-of-life. The DO-214AB (SMC) package is a standard footprint.
The part is surface-mount only, so board-level assembly follows standard reflow profiles for the SMC package.