TVS diode for 28 V rail protection
The 1.5SMC33CA TR13 PBFREE: With a 1500 W peak pulse power rating (10/1000 µs waveform), it handles surge events up to 33 A peak pulse current before the clamping voltage reaches 45.7 V. The 31.4 V minimum breakdown voltage guarantees the avalanche triggers before the protected line exceeds its rating.
Package and temperature range
The SMC footprint is standard for 1500 W TVS diodes, with a large copper pad on the cathode side to conduct heat into the board.
Central Semiconductor lists this part as Active in production — it is a current catalog item, not a phase-out or EOL line. No official successor or cross-reference is recorded; the 1.5SMC33CA is the standard bidirectional 33 V (Vbr min) TVS in the 1.5SMC series. For a unidirectional version or a different voltage, the same series offers variants with the same package and power rating.