What this Vishay 1.5SMC510AHM3_B/H Zener TVS diode protects in an automotive 24V bus
The 485V minimum breakdown voltage and 698V maximum clamping voltage define the protection window: the diode begins to avalanche at 485V and limits the surge to 698V at the rated 2.15A peak pulse current. For a 24V system, this provides a 50V+ margin above the worst-case steady-state voltage, preventing nuisance triggering from normal ripple.
Automotive qualification and operating envelope for under-hood and chassis environments
No power-line protection feature is built in — this is a pure clamping device for signal or low-power supply rails.
Active production and sourcing for BOM placement
The lifecycle status is Active, meaning Vishay continues to manufacture this part without a planned end-of-life notification. As a single-channel unidirectional device in the 1.5SMC family, the 1.5SMC510AHM3_B/H is a drop-in fit for designs requiring a 434V standoff TVS in the DO-214AB footprint. No pin-compatible successor or second-source is recorded on this order code.