Skip to main content
Littelfuse Inc. 1.5KE91A — Circuit Protection

Littelfuse 1.5KE91A TVS Diode, 1500W, 77.8V Standoff

MPN1.5KE91A
Active

Littelfuse Inc. 1.5KE series Zener TVS diode, 1.5KE91A, 1500W peak pulse power, 77.8V reverse standoff, 125V clamping, 12.2A peak pulse current, DO-201AA axial package, unidirectional.

$0.6700Ref. price · indicative, final on quote
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

1.5KE91A specifications
ParameterValue
TypeZener
Series1.5KE
MountingThrough Hole
Voltage - breakdown86.5V
Voltage - clamping (Max) @ ipp125V
Voltage - reverse standoff77.8V
Current - peak pulse (10/1000μs)12.2A
Power - peak pulse1500W (1.5kW)
Power line protectionNo
Operating temperature-55°C ~ 175°C (TJ)
PackageTape & Reel (TR) Cut Tape (CT)
ApplicationsGeneral Purpose
CaseDO-201AA, DO-27, Axial
Unidirectional channels1

Product details

1500 W peak pulse in a DO-201 axial body

The 1.5KE91A: The DO-201AA axial-lead package suits through-hole assembly in power supplies, industrial controls, and general-purpose protection circuits.

Clamping voltage and standoff margin

The minimum breakdown voltage is 86.5 V, giving a guard band above the standoff. The maximum clamping voltage of 125 V at 12.2 A peak pulse current defines the voltage the downstream circuitry must survive during a transient event. The 1500 W rating is derated at elevated temperatures per the standard power-temperature curve for axial-lead TVS diodes.

Active production and sourcing posture

It is available through independent distribution channels, quoted to order against BOM quantities.

Frequently asked questions

What package does the 1.5KE91A come in?

It is supplied in a DO-201AA (DO-27) axial-lead through-hole package. Available packaging options include Tape & Reel (TR) and Cut Tape (CT).