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Vishay General Semiconductor - Diodes Division 1.5KE91AHE3/51 — Circuit Protection

Vishay 1.5KE91AHE3/51 TransZorb TVS, 1500W, 77.8V Standoff

MPN1.5KE91AHE3/51
Obsolete

Vishay General Semiconductor - Diodes Division TransZorb® TVS, Automotive Grade, 1.5KE91AHE3/51, 1500W Peak Pulse, 77.8V Standoff, DO-201AA Axial, Bulk.

$0.5346Ref. price · indicative, final on quote
Vishay General Semiconductor - Diodes Division 1.5KE91AHE3/51 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

1.5KE91AHE3/51 specifications
ParameterValue
TypeZener
SeriesTransZorb®
MountingThrough Hole
Voltage - breakdown86.5V
Voltage - clamping (Max) @ ipp125V
Voltage - reverse standoff77.8V
Current - peak pulse (10/1000μs)12A
Power - peak pulse1500W (1.5kW)
Power line protectionNo
Operating temperature-55°C ~ 175°C (TJ)
GradeAutomotive
PackageBulk
QualificationAEC-Q101
CaseDO-201AA, DO-27, Axial
Unidirectional channels1

Product details

Peak pulse power and protection window

The 1.5KE91AHE3/51 is a 1500W (1.5kW) peak pulse power TransZorb® TVS diode from Vishay, rated for a 10/1000µs waveform. Its 77.8V reverse standoff voltage means it stays out of the way during normal operation, clamping transients at 125V max when the 12A peak pulse current hits.

The single unidirectional channel (one diode) is straightforward to place on a PCB — just orient the cathode band toward the protected rail. The DO-201AA axial leaded package is through-hole, easy to hand-solder or wave-solder, and the bulk packaging suits low-volume production or prototyping.

Obsolete status and sourcing path

Vishay has marked the 1.5KE91AHE3/51 as obsolete.

Frequently asked questions

What is the closest pin-compatible alternative to the 1.5KE91AHE3/51?

A functionally similar TVS with the same 77.8V standoff and 1500W rating in a DO-201AA package would need to be evaluated for breakdown voltage and clamping specs against the BOM requirements.