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Vishay General Semiconductor - Diodes Division 1.5KE91A-E3/51 — Circuit Protection

Vishay 1.5KE91A-E3/51 TransZorb TVS, 1.5kW, 77.8V

MPN1.5KE91A-E3/51
Last Buy

Vishay General Semiconductor TransZorb® TVS Diode, Zener Type, 1.5KE91A-/51, 1500W Peak Pulse, 77.8V Standoff, 125V Clamp, DO-201AA Axial, Bulk.

$0.7268Ref. price · indicative, final on quote
Vishay General Semiconductor - Diodes Division 1.5KE91A-E3/51 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

1.5KE91A-E3/51 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)
PackageBulk
ApplicationsGeneral Purpose
CaseDO-201AA, DO-27, Axial
Unidirectional channels1

Product details

Last-time-buy status and what it means for your BOM

The 1.5KE91A-E3/51: Vishay has placed the 1.5KE91A-/51 on Last Buy status — the manufacturer is no longer accepting unlimited orders, and the remaining production window is finite.

What the 1.5 kW rating means in a real circuit

At the 12 A peak pulse current the device clamps at 125 V maximum, so a 77.8 V nominal rail sees the overvoltage limited to 125 V before the TVS absorbs the energy.

Through-hole mounting in a DO-201AA (DO-27) axial-lead package — the 1.5KE series footprint is a standard two-hole pattern on 0.300-inch centres, compatible with wave-solder assembly.

Frequently asked questions

What is the closest pin-compatible alternative to the 1.5KE91A-/51?

A functional replacement requires a TVS with 77.8 V standoff, 1.5 kW peak pulse, and DO-201AA axial package — parametric equivalents from other manufacturers exist but are not cross-referenced here.