The 1.5SMC480AHM3_A/H is a 1500W Zener TVS diode from Vishay's 1.5SMC TransZorb series, qualified to AEC-Q101 for automotive use. It clamps transients at 658V maximum from a 408V reverse standoff level, with a minimum breakdown voltage of 456V. The single unidirectional channel handles 2.28A peak pulse current under the 10/1000µs waveform, which is the standard telecom surge shape — the same waveform used for IEC 61000-4-5 surge testing.
AEC-Q101 qualification means this part passed the automotive stress tests: temperature cycling, high-temperature reverse bias, and pre-conditioning for surface-mount reflow.
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