What this 1.5 kW TVS diode brings to an automotive line
The 1.5SMC130CAHM3_A/I: It operates from -65°C to 150°C junction, so it handles engine-bay heat and cold-soak equally.
Bidirectional clamping and voltage thresholds
The 111 V reverse standoff is the maximum continuous DC voltage the diode blocks without conducting. Below that, it looks like an open circuit; above it, the Zener breakdown diverts the surge energy to ground.
Package and board integration
Housed in a DO-214AB (SMC) package, surface-mount, supplied on tape and reel. The footprint is standard for this power level — the cathode band (or bidirectional marking) is the only orientation cue, and it is clear enough to place by hand if needed. No power line protection feature here — this is a pure transient suppressor, not a crowbar or a filter. It sits across the protected line and shunts overvoltage events to ground.
For a BOM hedge, a parametric match on standoff voltage and package is the practical path.