The 1.5SMC11A-M3/57T: The 9.4 V reverse standoff voltage means the protected rail can sit at 9.4 V DC without the diode conducting leakage; breakdown starts at 10.5 V minimum, so a 9 V or 9.4 V supply line stays below the avalanche threshold. Single unidirectional channel in a DO-214AB (SMC) body — the same footprint as the SMCJ industry standard, so the board layout matches any JEDEC-registered SMC TVS without a pad revision.
Temperature envelope and production status
Junction temperature range spans -65 °C to +150 °C, covering the full military-temperature tail — the diode's leakage and clamping voltage shift with temperature, but the die itself is rated across the entire band.