1.5 kW automotive TVS in DO-201 axial
The 1.5KE400AHB0G is a 1500 W peak-pulse-power Zener TVS diode from Taiwan Semiconductor, qualified to AEC-Q101 for automotive use. It clamps transients on a 342 V nominal rail to 548 V at 2.8 A (10/1000 µs waveform). The DO-201 (DO-27) axial-lead package suits through-hole assembly in high-reliability power supplies and ECU input protection.
Clamping voltage and surge current for the rail
Reverse standoff is 342 V — the TVS draws negligible leakage below that voltage, so it sits across a 342 V DC bus or a 240 VAC rectified line without loading the rail. Breakdown triggers at 380 V min, clamping at 548 V max with a 2.8 A peak pulse current. The 1500 W rating is the product of clamp voltage and peak current at the 10/1000 µs test waveform; actual energy capability depends on pulse duration and duty cycle. Single unidirectional channel — for AC lines or bipolar rails, two devices back-to-back are needed. The junction operates from -55 °C to 175 °C, covering the full automotive temperature envelope underhood.
DO-201AA (DO-27) axial-lead package, 0.052-inch (1.3 mm) diameter leads. The through-hole body requires a 1.1 mm drill hole per lead; the cathode band identifies polarity. The axial format is hand-solder or wave-solder compatible and fits existing TVS footprints in power supply and motor-drive circuits.