The 1.5SMC10A-M3/9AT: This Zener TVS clamps a 10/1000 µs surge at 103 A peak pulse current, with the clamping voltage held to 14.5 V maximum at that current. The 1500 W rating is the product of clamp voltage and peak current — it tells you the device can absorb a short-duration transient without failing, but the real-world margin depends on the actual surge waveform and ambient temperature. The reverse standoff voltage is 8.55 V, meaning the diode will not conduct appreciably below that level; breakdown starts at 9.5 V minimum.
DO-214AB package — rework and footprint
Housed in a DO-214AB (SMC) surface-mount package, the same footprint as the SMCJ series. The large tab on the bottom side carries the heat — the copper pad area under the cathode determines the thermal resistance to the board. Under a hot-air station, preheat the board to 125 °C before removing the part; the package itself is robust enough to survive a rework cycle if the pad is not overheated. Polarity is marked on the body, so orientation is clear. Operating temperature range spans -65°C to 150°C junction, which covers most automotive and industrial environments without derating at the high end for short pulses. The wide range also means the part can sit on a board near a hot regulator or motor driver without concern.
Sourcing and compliance
RoHS and REACH compliance documentation is standard for Vishay's M3 suffix parts. The tape-and-reel packaging (TR suffix) suits automated pick-and-place assembly.