The 1.5SMC56AHM6G is a 1500 W peak-pulse-power Zener TVS diode in the 1.5SMC series, qualified to AEC-Q101 for automotive applications. Clamping is specified at 77 V maximum at the 20 A peak-pulse current (10/1000 µs waveform). That 77 V ceiling is the voltage the protected circuit sees during the surge — downstream components must tolerate this peak without damage or latch-up.
Automotive-grade construction and package fit
AEC-Q101 qualification means this part has passed the full automotive stress battery: high-temperature reverse bias, temperature cycling, and ESD robustness per the JEDEC-based automotive discrete standard. The single unidirectional channel protects one rail; for bidirectional or multi-rail designs, a separate device per line is needed.
The base product number 1.5SMC56 covers the non-automotive variant of the same die and package — the AHM6G suffix specifically denotes the AEC-Q101 qualified, tape-and-reel packaged version for automotive production lines.