What this TVS protects and where it clamps
Reverse standoff is 40 V, so it sits across the line without conducting during normal operation. When a surge hits, breakdown starts at 44.4 V min and the clamping voltage is held to 64.5 V max at the peak pulse current of 7.8 A. The 500 W peak pulse power rating applies to the standard waveform — enough for secondary protection on a 40 V DC bus or a single-phase AC line after a bridge rectifier. This is a unidirectional device, so it clamps only one polarity. For AC lines or bidirectional protection, you would need two parts back-to-back or a bidirectional TVS.
Package and temperature range for the board
Housed in a surface-mount package common for TVS diodes. Supplied on Tape & Reel — pick-and-place ready for volume assembly.
Microchip lists this part as Active.