The 1.5SMC47AHM3/I is a Zener-type TVS diode from Vishay's 1.5SMC series, part of the TransZorb® family. It is qualified to AEC-Q101, the automotive discrete semiconductor reliability standard, which means it has passed the temperature cycling, ESD, and high-temperature reverse bias tests required for under-hood and chassis-domain electronics.
Supplied on Tape & Reel, it is compatible with standard pick-and-place and reflow soldering processes. No power line protection feature is implemented — this is a dedicated transient suppressor for signal or low-power supply rails, not a mains-side clamp.
Lifecycle and sourcing posture
Target applications include automotive electronic control units, telecom line cards, and general-purpose transient suppression where AEC-Q101 qualification is required. The 40.2V standoff voltage suits 24V and 36V nominal rails with margin for steady-state ripple.