Automotive-grade TVS for 400V bus protection
The 1.5SMC480AHE3_AIH is a Zener-type transient voltage suppressor from Vishay's 1.5SMC series, qualified to AEC-Q101 for automotive applications. This unidirectional device is suited for protecting 400V nominal DC buses in automotive systems — think EV traction inverters, on-board chargers, or DC-DC converters where the bus sees load-dump or inductive kickback transients. The 1500W rating means it absorbs a single high-energy pulse without failing short, but the 2.28A peak pulse current (at 10/1000µs) sets the energy ceiling: higher surge currents call for a larger TVS or a series resistor to limit the pulse.