Clamping and breakdown — where the protection window sits
The 1.5SMC130CAHM3_A/H: The reverse standoff voltage is 111 V, meaning the diode starts conducting only above that level — normal 111 V bus operation sees no leakage. That 179 V ceiling is what the protected circuit must survive; if the downstream device's absolute max is lower, this part won't protect it. With a single bidirectional channel, this TVS handles both positive and negative transients in one package — useful on AC-coupled or floating lines where polarity isn't fixed. The -65°C to 150°C junction temperature range covers the full automotive under-hood envelope, with margin for self-heating during repetitive surge events.
Automotive qualification and package fit
Housed in a DO-214AB (SMC) package, the footprint is standard for this power class — the same pad layout as other 1.5 kW SMC TVS diodes. The tape-and-reel packaging suits high-volume pick-and-place; the reel quantity is the usual 3000 or 5000 count for this package size.