DO-214AB (SMC) — the standard surface-mount footprint for 1500W class
The 1.5SMC200CA_R1_00001: Housed in the DO-214AB (SMC) package, this part uses the same PCB footprint as other 1500W TVS diodes in the 1.5SMC family — the copper pad area under the cathode tab sets the thermal impedance for pulse dissipation. The single bidirectional channel means a single device protects a symmetrical signal pair or a DC rail where polarity reversal is possible, saving board space versus two unidirectional diodes back-to-back.