Peak pulse current and clamping voltage — the surge budget
The 1.5SMC10CA-M3/57T: The clamping voltage at that current is 14.5V maximum — this is the voltage the protected circuitry sees during the surge event, so the downstream components must survive at least that peak. The breakdown voltage range starts at 9.5V minimum, meaning the device begins to avalanche and conduct between 9.5V and the clamping voltage. Below 8.55V reverse standoff, it draws negligible leakage current — the normal operating condition. Operating temperature spans -65°C to 150°C junction, covering military and industrial thermal extremes without derating the pulse power until the upper end of the range.
DO-214AB (SMC) surface-mount package
Housed in the DO-214AB (SMC) package, also designated SMCJ by some suppliers, this is a standard surface-mount footprint for 1500W-class TVS diodes. The mounting type is surface mount, with the cathode band (for unidirectional variants) or bidirectional marking on the body. For this bidirectional part, the marking is typically the part number without polarity indicators.
Active production — sourcing posture
The base product number is 1.5SMC10, and the -M3/57T suffix denotes the specific packaging and environmental rating (likely the Vishay green/RoHS-compliant option).