1500 W pulse clamp for 154 V rails
The 1.5SMC180CA-M3/57T: It clamps transients on a 154 V nominal rail — the reverse standoff voltage — and breaks down at a minimum of 171 V before clamping at 246 V maximum at the 6.1 A peak pulse current. The 154 V standoff means the diode draws negligible leakage below the normal operating voltage of a 150 VDC bus, then activates when a surge pushes the line above the breakdown threshold. The 246 V clamp voltage is the ceiling the protected circuit sees during the pulse — downstream components must survive that peak.
Housed in the DO-214AB (SMC) package with a surface-mount footprint, the 1.5SMC180CA-M3/57T mounts directly to the PCB copper pour. The supplier device package is also listed as DO-214AB (SMCJ), confirming the same mechanical outline. The operating temperature range spans -65°C to 150°C junction, covering industrial enclosures and under-hood automotive environments. The bidirectional construction uses a single die in one package — one device clamps both polarities, saving board space versus two unidirectional TVS diodes back-to-back.