Protection thresholds — standoff, breakdown, clamping
The 1.5SMC440A/TR13: Rated for 376 V reverse standoff (the maximum continuous DC voltage the TVS can block without conducting) and 418 V minimum breakdown voltage — the point where the Zener junction starts to avalanche.
1500 W peak pulse — what it means for surge protection
For a 376 V standoff rail, this translates to a peak pulse current of 2.5 A — the TVS absorbs that surge without exceeding the clamping voltage. The 1.5SMC series is a standard industrial-grade TVS family for general-purpose transient suppression on AC/DC power lines and high-voltage DC buses.
DO-214AB (SMC) package — board-fit note
Surface-mount in a DO-214AB (SMC) package — the larger SMC body compared to SMA/SMB provides lower thermal resistance for the 1500 W pulse. Single unidirectional channel; the cathode band marks the anode-to-ground orientation.