Automotive-grade transient suppression for 185V rails
The 1.5SMC220CAHM3/I: Its 185V reverse standoff voltage and 209V minimum breakdown voltage place it on a nominal 185V DC bus — common in telecom rectifiers and automotive 48V mild-hybrid systems where load-dump transients can spike well above the rail.
Package and board-fit for field replacement
The bidirectional configuration means you can drop it in without worrying about polarity; it clamps symmetrically in both directions, which saves a layout review when the rail polarity is ambiguous. If you are swapping one in the field, the SMC body is large enough to hand-solder with a standard iron — no hot-air station needed.
Listed as Active — no end-of-life notice, no last-time-buy window. For telecom and automotive BOMs that require a documented PPAP, this part carries the automotive pedigree.