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Littelfuse Inc. 1.5KE91A-TB — Circuit Protection

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

MPN1.5KE91A-TB
Active

Littelfuse Inc. 1.5KE series Zener TVS diode, unidirectional, 1500W peak pulse power, 77.8V reverse standoff, DO-201AA axial-lead package, Tape & Box.

$0.2611Ref. price · indicative, final on quote
Littelfuse Inc. 1.5KE91A-TB datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

1.5KE91A-TB 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 & Box (TB)
ApplicationsGeneral Purpose
CaseDO-201AA, DO-27, Axial
Unidirectional channels1

Product details

What the 1500W peak pulse rating means for your rail

The 1.5KE91A-TB: The breakdown voltage range starts at 86.5V minimum, so the diode does not conduct during normal 77.8V operation.

Package and board-fit constraints

Housed in a DO-201AA (DO-27) axial-lead package, the 1.5KE91A-TB is a through-hole part. The lead diameter and body length dictate the PCB hole size and the bend radius for vertical or horizontal mounting — standard for high-power TVS diodes where the lead cross-section carries the surge current without fusing. The Tape & Box (TB) packaging format is a bulk or ammo-pack for through-hole insertion, not tape-and-reel. This affects how the part feeds into automatic insertion equipment — confirm the feeder compatibility if your line expects reeled parts.

No pin-compatible second-source or successor is recorded in the official documentation.