What 1.5SMC8.2A-M3/57T is and where it fits
The 1.5SMC8.2A-M3/57T is a unidirectional Zener-based transient voltage suppressor from Vishay's 1.5SMC series, branded as a TransZorb® — Vishay's TVS architecture that uses a Zener junction to clamp surges without the forward-conduction path of a true bidirectional symmetrical TVS. It mounts surface-mount in the DO-214AB (SMC) package and is shipped on Tape & Reel for automated assembly. General-purpose classification means it suits consumer, industrial, and communications board-level protection roles — not a dedicated automotive or safety-rated grade without supplemental qualification.
What the peak pulse ratings mean for your protection circuit
This 1.5 kW ceiling is the primary sizing parameter — the clamping voltage of 12.1 V max at Ipp is what actually appears across the protected node when the peak pulse current of 124 A flows through the device during a surge event. The absence of a power-line protection flag tells you this is a board-rail suppressor, not a mains-front-end clamp: keep it downstream of the input filtering stage where it clamps residual differential spikes the upstream MOV or gas tube did not catch.
Sourcing posture — active lifecycle, no last-time-buy on record
marks this part Active — no NRND flag, no EOL notice, no last-time-buy window. The 1.5SMC series is a long-running Vishay line and the 1.5SMC8.2A variant is a standard 8.2 V working-voltage clamp, not a specialty or newly obsoleted variant. Sourced to order through independent distribution; availability and lot-level pricing confirmed at RFQ.