1.5SMC91A — 125 V clamping for unidirectional transient suppression
The 1.5SMC91A_R1_00001 is a unidirectional Zener-type TVS diode in the DO-214AB (SMC) package, rated 1500 W peak pulse at 125 V clamping. The 77.8 V reverse standoff sits below the 86.5 V minimum breakdown, giving the diode headroom to stay off during normal circuit operation and snap into conduction on a transient — the three-voltage selection logic every TVS designer works through.
Wide Tj range for stressed environments
Operating junction temperature runs -55°C to 150°C — the upper bound is the key differentiator from commercial-grade 1.5SMC variants. A TVS specified to 150°C Tj holds its clamping characteristics under repeated transient stress without the derating curves eating into the design margin. If the end equipment is automotive or industrial-safety-rated, confirm the qualification matrix against the Panjit datasheet before committing the BOM line.
SMC package and reel format for production assembly
DO-214AB (SMC) is the standard industry footprint for this power class — the cathode band on the body marks polarity on the unidirectional device, which is non-negotiable for correct reverse-bias clamping orientation. Tape-and-reel packaging is listed alongside cut-tape; reel quantities align with standard SMC assembly pitch — verify the EIA-481 carrier tape dimensions against the pick-and-place feeder width before scheduling production.