What a 1.5 kW standoff voltage means on the bench
The 1.5SMCJ36AS_R1_00001: This is a unidirectional Zener-based TVS — it clamps transients in one direction, leaving the reverse-polarity leg to the circuit ground.
The clamping margin is the selection number
The 40 V minimum breakdown sits about 11 % above the 36 V standoff — the TVS stays off under normal operation and turns on hard when a fast transient hits.
Wide junction temperature range and SMT footprint
The SMC footprint is the standard pick for 1.5 kW TVS arrays; the cathode band marking on the package makes polarity obvious at a glance, which matters for hand-placement or rework under a microscope.
