The 1.5SMCJ200A_R1_00001 is a unidirectional Zener-based TVS diode in the 1.5SMCJ series — that series is the 1.5 kW unidirectional SMC package family, the standard transient suppressor footprint for higher-voltage rails where through-hole packages won't fit on the board. The 200 V reverse standoff is the working voltage the protected rail can sit at continuously without the TVS conducting — a 200 V nominal rail with normal operating margin stays below the breakdown threshold.
What the clamping and breakdown figures mean under surge
The minimum breakdown voltage is 220 V — once the transient pushes the rail above that threshold the TVS avalanche-clamps and conducts the surge current away from the load. The 4.6 A peak pulse rating is defined on a 10/1000 µs waveform — a faster edge event (8/20 µs, which is a common lightning/inductive surge waveform) will produce a higher instantaneous current for the same energy, so check that the actual surge standard in your system matches the 10/1000 µs condition the 1.5 kW rating is based on.
Temperature grade and DO-214AB SMC assembly
Junction temperature rating is -55°C to 150°C — the upper bound is the junction limit, not the ambient, so the thermal resistance of the board footprint and the local ambient together must keep the die below 150°C under worst-case fault conditions. Surface-mount DO-214AB SMC package mates to the standard SMC footprint — the cathodic bar on the package body identifies the polarity band; reflow profile follows standard lead-free assembly practice for this package size. Cut Tape is useful for prototyping or low-quantity board spins without committing a full reel.