40V standoff bidirectional TVS in automotive trim
The 1.5SMCJ40CA-AQ is a bidirectional Zener-type TVS diode from Diotec, qualified for automotive applications. Its reverse standoff of 40 V sets the working rail it protects — the device sits idle below that and clamps above it. Breakdown minimum is 44.4 V; under a 10/1000 µs surge the clamping ceiling is 64.5 V at a peak pulse current of 23.3 A.
The 1.5 kW peak pulse rating defines the surge energy the SMC package can absorb one-time without degradation — the clamping voltage at 23.3 A is what the downstream circuit actually sees during the event.
DO-214AB SMC foot print, surface mount
The strip packaging indicates reel-taped units for automated pick-and-place; confirm the reel quantity matches your line feeder capacity before the first build.