The 1.5SMC100A-M3/9AT: Its 85.5 V reverse standoff voltage makes it a fit for protecting 85 V nominal DC rails — common in telecom rectifiers, industrial power supplies, and battery-backed buses — against surges that would otherwise reach the downstream converter or load.
Breakdown, standoff, and operating temperature range
Minimum breakdown voltage is 95 V, ensuring the device starts conducting before the rail exceeds that threshold. The unidirectional configuration (single channel) is intended for DC lines where polarity is fixed — reverse the connection and the diode conducts in forward bias, which is not a protection mode. Operating junction temperature spans -65 °C to 150 °C, covering the full industrial and military temperature envelope. The 1500 W rating is derated above 25 °C per the datasheet curve; at 125 °C ambient the peak pulse power drops to roughly 60 % of the 25 °C value, so the derating must be factored into the surge budget for high-temperature environments.
Package, mounting, and production status
Housed in the DO-214AB (SMC) package, also referred to as SMCJ in supplier documentation.