1500W surge clamp for 40V DC rails
The 1.5SMC47A-M3/9AT: No power line protection means this part is intended for DC distribution or signal-level rails, not AC mains clamping.
Package and thermal envelope
The tape-and-reel packaging suits automated pick-and-place assembly. The single unidirectional channel means the cathode band on the package body identifies the anode-to-ground orientation — reverse insertion defeats the clamping function entirely.
The part is RoHS-compliant as standard for the Vishay 1.5SMC series, though specific compliance documentation (REACH, UL) should be requested per lot.