53 V standoff, 85 V clamping — the transient protection chain
The 1.5SMC62CAHM3/H clamps at 85 V maximum when hit with the 10/1000 µs surge current of 17.6 A peak pulse. At rest it sits quiet at 53 V typical reverse standoff — the supply rail sees the diode as an open circuit until a transient pushes it into breakdown above 58.9 V minimum. That 85 V clamping ceiling is what the downstream circuitry survives.
The series designation marks this as AEC-Q101 qualified — the automotive IC stress grade, which means it passed temperature cycling, humidity bias, and surge life testing that a commercial TVS did not. For a telecom board this is belt-and-suspenders; for an automotive ECU it is the entry ticket. Surface-mount DO-214AB (SMC) package reflow-solders to the board — the toe and heel pad dimensions need the standard SMC land pattern. The Tape & Reel packaging suits high-volume pick-and-place; confirm the reel count matches your feeder before loading.
Operating temperature range and applications
The listed applications are Automotive and Telecom — both environments where the diode sees supply transients and must stay clamped without going short. Bidirectional means it clamps both polarities without a polarity mark on the part — wire it either way across the rail and it protects regardless of whether the surge is positive or negative going.