Clamping envelope for a 136 V rail
The 1.5SMC160CAHE3/9AT: With a 136 V reverse standoff voltage, this TVS sits on a nominal 120 V or 130 V DC bus without conducting leakage in normal operation. Breakdown starts at 152 V minimum, and the clamping voltage is held to 219 V at the 6.8 A peak pulse current (10/1000 µs waveform).
Part of the 1.5SMC and TransZorb series — a mature Vishay TVS platform with consistent surge capability across the voltage range.
Sourcing posture for this part
The DO-214AB (SMC) footprint is shared across the 1.5SMC family, so a voltage variant swap (e.g., 1.5SMC150CA or 1.5SMC170CA) is a parametric BOM change, not a board respin, if the clamping window shifts.