The 1.5SMC350C: The single bidirectional channel provides symmetrical clamping for AC-coupled or bipolar lines, eliminating the need for two back-to-back unidirectional devices.
Supplied in Tape & Reel (TR) format, it is suited for volume production runs where the reel quantity matches the BOM line consumption.
No pin-compatible direct replacement is listed by Littelfuse, so a BOM review for an alternative TVS with equivalent 300 V standoff and 1500 W rating in DO-214AB is advised for new designs. The part carries no power line protection rating (No per), confirming it is intended for secondary-side DC rail or signal line clamping, not AC mains primary protection.