The 1.5SMC220AHM3_A/H is a Zener TVS diode from Vishay's 1.5SMC series, qualified to AEC-Q101 — the automotive discrete semiconductor stress test standard. That means it carries documented reliability data for temperature cycling, ESD, and latch-up immunity that an OEM auditor will expect in a PPAP submission. For a 24 V automotive bus protected by this diode, the clamping margin to downstream components is well-defined.
Electrical ratings and thermal envelope
These figures define the protection corridor for a 185 V continuous rail — the diode stays transparent below standoff and conducts only on overvoltage events.
The product status is Active per the manufacturer's lifecycle record. No end-of-life notice or last-time-buy window is on file.