1.5 kW unidirectional TransZorb in a DO-201AA axial package
The 1.5KE400A-804E3/54: Housed in a DO-201AA (DO-27) axial-lead package, it mounts through hole and is intended for automotive applications where a single unidirectional channel protects a 342 V nominal rail from high-energy surges up to 1.5 kW.
For a 342 V standoff rail, the TVS remains transparent under normal operation and only conducts when the transient exceeds the 380 V breakdown threshold. The 1500 W peak pulse rating is the device's energy-handling capability for the standard 10/1000 µs waveform — a key parameter for sizing protection in automotive load-dump or inductive kickback scenarios.
Automotive qualification and compliance
The series is also RoHS-compliant and supplied in tape-and-reel packaging for automated assembly.
Obsolete — sourcing through independent channels
Vishay has marked the 1.5KE400A-804E3/54 as obsolete. No official successor order code is recorded. For new designs, a functionally equivalent TVS with the same standoff voltage and package should be selected from Vishay's current TransZorb portfolio.