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Littelfuse Inc. 1.5KE33-B — Circuit Protection

1.5KE33-B Littelfuse Zener TVS, 1500W, DO-201

MPN1.5KE33-B
Obsolete

Littelfuse 1.5KE series Zener TVS diode, 1.5KE33-B, 1500W peak pulse, 28.2V reverse standoff, 47.99V clamping, DO-201AA axial, bulk.

Littelfuse Inc. 1.5KE33-B datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

1.5KE33-B specifications
ParameterValue
TypeZener
Series1.5KE
MountingThrough Hole
Voltage - breakdown29.75V
Voltage - clamping (Max) @ ipp47.99V
Voltage - reverse standoff28.2V
Current - peak pulse (10/1000μs)33.3A
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

Through-hole DO-201 package

Housed in a DO-201AA (DO-27) axial-lead package, the 1.5KE33-B is a through-hole device intended for board-level transient suppression in general-purpose power and signal circuits.

Obsolete — sourcing via independent channels

Littelfuse lists the 1.5KE33-B as obsolete. No official successor or pin-compatible alternative is recorded from the manufacturer. For new designs, consider a current-production 1.5KE series variant with the same standoff voltage and package.