1500W peak pulse power in a bidirectional SMC package
The 1.5SMC120CA-M3/57T: This energy rating determines how much transient energy the part can absorb before the junction fails — for a 102V standoff rail, the 165V clamping ceiling at 9.1A peak pulse current means a 48V battery bus or 120VAC rectified rail sees the clamp engage well before the downstream silicon reaches its breakdown voltage.
Breakdown and clamping thresholds for a 102V standoff rail
Reverse standoff voltage is 102V — the maximum continuous DC voltage the diode can block without significant leakage. Breakdown triggers at a minimum of 114V, with the avalanche clamping the transient to 165V maximum at the rated 9.1A peak pulse current. The single bidirectional channel means the same device protects both polarities, which simplifies BOM consolidation on AC-coupled signal lines or bipolar power rails where the transient can swing either direction. Operating junction temperature spans -65°C to 150°C, so the diode maintains its clamping characteristic across the full automotive-grade thermal envelope without derating the peak pulse power at cold start or underhood soak-back. The DO-214AB (SMC) package footprint matches the industry-standard SMCJ land pattern, making it a drop-in replacement for other 1500W bidirectional TVS devices in the same case size.