1500W peak pulse — what that clamp rating means for your rail
The 1.5SMC130A-M3/57T: The 111V reverse standoff voltage means it sits across a 100V or 110V DC rail without conducting in normal operation, only triggering when the line exceeds the 124V minimum breakdown threshold. The 1500W rating is the peak power the die can absorb for that specific pulse shape — derate for longer pulse widths or higher ambient temperatures per the datasheet curve. For a 24V or 48V telecom rail this part would be over-specified; it is sized for nominal 100-110V DC buses where the standoff margin is tight.
DO-214AB SMC package — reflow and footprint fit
Housed in the standard DO-214AB (SMC) surface-mount package, with the supplier device package also listed as DO-214AB (SMCJ). The footprint is shared across the 1.5SMC series, so a single PCB land pattern covers the full voltage range from 5.0V to 220V standoff. The package is rated for the full -65°C to 150°C junction temperature range.
Sourcing this part — RFQ posture
As an active Vishay part, the 1.5SMC130A-M3/57T is sourced through authorized and independent distribution channels.