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Littelfuse Inc. 1.5KE20-B — Circuit Protection

1.5KE20-B Littelfuse TVS Diode, 1500W, 17.1V Standoff

MPN1.5KE20-B
Obsolete

Littelfuse Inc. 1.5KE series Zener TVS diode, 1.5KE20-B, 1500W peak pulse power, 17.1V reverse standoff, DO-201AA axial-lead package, bulk.

Littelfuse Inc. 1.5KE20-B datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

1.5KE20-B specifications
ParameterValue
TypeZener
Series1.5KE
MountingThrough Hole
Voltage - breakdown18V
Voltage - clamping (Max) @ ipp29.09V
Voltage - reverse standoff17.1V
Current - peak pulse (10/1000μs)54.9A
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

Obsolete 1.5KE20-B — sourcing reality for a discontinued TVS

The 1.5KE20-B is marked Obsolete by Littelfuse, meaning the factory line has stopped and no further production runs are scheduled.

Reverse standoff voltage is 17.1V, so the diode does not conduct at normal DC bus levels up to that point; breakdown begins at 18V minimum.

Package and temperature — through-hole fit for high-reliability boards

Supplied in the DO-201AA (DO-27) axial-lead package, through-hole mount, with the DO-201 supplier device package designation. Operating junction temperature range spans -55°C to 175°C, covering military and industrial thermal environments without derating concerns.