1500 W peak pulse in an axial DO-201AA
The 1.5KE43AHE3_A/C is a 1500 W peak pulse power TVS diode from Vishay's automotive-grade TransZorb® series, qualified to AEC-Q101. It clamps a transient at 59.3 V maximum while conducting 25.3 A of peak pulse current (10/1000 µs waveform). The 36.8 V reverse standoff voltage means the diode does not conduct at normal 36 V or lower rail voltages — it only activates when the line exceeds the minimum breakdown of 40.9 V. The DO-201AA (DO-27) axial leaded package requires a through-hole board layout — the leads are crimped and soldered into plated holes, not surface-mounted. The 1.5KE series package body is the same footprint as other 1.5KE devices, so a single PCB pad pattern covers the full voltage range.
Automotive-grade thermal and reliability envelope
The AEC-Q101 qualification includes the full suite of automotive stress tests — temperature cycling, high-temperature reverse bias, and ESD robustness. The single unidirectional channel protects one signal or power line. The 'No' power line protection flag means this device is not intended for continuous AC mains clamping — it is designed for transient suppression on DC rails, not for overvoltage ride-through. Tape-and-reel packaging suits automated insertion for volume board assembly. The axial leads are taped per EIA-296 standards, compatible with radial lead forming and insertion equipment.
Sourcing and lifecycle posture
The base product number 1.5KE43 covers the full family; the AHE3 suffix denotes the AEC-Q101 automotive grade and the lead-free / RoHS-compliant finish.