Clamping and transient suppression performance
The 1.5SMC62A-M3/57T: The 85 V clamping voltage at 17.6 A peak pulse (10/1000 µs) is the suppression ceiling — when a lightning surge or inductive kick lands on the line, the Zener junction turns on and clamps the transient to 85 V, protecting whatever silicon sits behind it. At 1.5 kW peak pulse power the part survives the event without going into thermal runaway, and the 58.9 V minimum breakdown voltage keeps the device off during normal 53 V rail operation. That 5 V headroom between standoff and breakdown gives adequate margin for supply tolerance on a 48 V nominal rail.
Package and reel format
The DO-214AB (SMCJ) footprint is the standard land pattern for 1.5–3 kW TVS diodes — the cathode bar on the package aligns with the thermal pad on the PCB, and the wide copper pad underneath the tab carries the transient current away without lifting the solder joint. Tape-and-reel packaging suits automated pick-and-place on high-volume boards — confirm the reel quantity matches your panelization before committing to a BOM quantity, as MOQ on full reel can run 3,000–5,000 pieces depending on the distributor lot split.
Series family and BOM cross-reference
The 1.5SMC series covers a wide voltage ladder in the same SMC package with the same pinout — the base product number 1.5SMC62 anchors this to the 62 V standoff slot, and any voltage grade in the same series with the same footprint is pin-compatible on the same layout. For a second-source hedge, check whether the alternate voltage grade drops into the same land pattern without a board spin.