TVS clamp for 185 V rails — 1500 W in a DO-214AB
The 1.5SMC220A-M3/57T: Its 1500 W peak pulse power rating (10/1000 µs waveform) handles surge events common in industrial power supplies, telecom rectifiers, and motor-drive DC buses. Breakdown occurs at a minimum of 209 V, clamping the line to 328 V maximum at the 4.6 A peak pulse current. That 328 V ceiling is the number to check against downstream component voltage ratings — if the clamped transient exceeds the MOSFET or capacitor rating, the TVS is undersized for that node.
Package and rework — DO-214AB (SMC) footprint
Housed in a DO-214AB (SMC) package, the same footprint as the SMCJ standard. No underfill or special bake needed for this standard epoxy mold compound.
The part is supplied on Tape & Reel (TR) for automated pick-and-place. RoHS compliance is standard for the M3 suffix (Matte Tin plating). No UL or IEC certification number is listed in the available specs, but the TransZorb® series carries Vishay's standard TVS qualification per JEDEC.