1500 W peak pulse — what it means for the rail
The 1.5SMC30 is a Littelfuse Zener TVS diode from the 1.5SMC series, rated for 1500 W peak pulse power under the 10/1000 µs waveform. The single unidirectional channel covers one polarity; for bipolar rails a second device in anti-series handles the return swing.
DO-214AB footprint and storage
Housed in the DO-214AB (SMCJ) package, the 1.5SMC30 is a surface-mount device suited for reflow assembly. The Tape & Reel packaging means the reels should be stored dry — the plastic body absorbs moisture, and a bake cycle before reflow prevents popcorning if the seal is broken.
Sourcing runs through independent distribution — quantities are lot-specific and confirmed at RFQ. For a BOM line that depends on this part, a last-time-buy or a cross-reference to a current-production TVS with the same standoff and clamp voltages is the practical path forward.