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Littelfuse Inc. 1.5KE56C-B — Circuit Protection

1.5KE56C-B Littelfuse TVS Diode, 1500W, Bidirectional

MPN1.5KE56C-B
Obsolete

Littelfuse 1.5KE series Zener TVS diode, 1500W peak pulse power, 47.8V reverse standoff, 50.4V breakdown, 80.85V clamping, bidirectional, DO-201AA axial package, bulk.

Littelfuse Inc. 1.5KE56C-B datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

1.5KE56C-B specifications
ParameterValue
TypeZener
Series1.5KE
MountingThrough Hole
Voltage - breakdown50.4V
Voltage - clamping (Max) @ ipp80.85V
Voltage - reverse standoff47.8V
Current - peak pulse (10/1000μs)19.7A
Power - peak pulse1500W (1.5kW)
Power line protectionNo
Operating temperature-55°C~175°C(TJ)
PackageBulk
ApplicationsGeneral Purpose
CaseDO-201AA, DO-27, Axial
Bidirectional channels1

Product details

Littelfuse has marked the 1.5KE56C-B as obsolete.

Key ratings and what they mean for circuit protection

The 47.8V reverse standoff voltage means the device does not conduct below that DC level — it sits across the rail and only clamps when a transient pushes the line above the 50.4V minimum breakdown threshold. At the full 19.7A peak pulse current, the clamping voltage reaches 80.85V max.

Through-hole DO-201AA (DO-27) axial package, supplier device package DO-201. The axial leads suit point-to-point wiring or through-hole PCB mounting — the body diameter and lead spacing are standard for the 1.5 kW class.

Frequently asked questions

What is the 1.5KE56C-B used for?

It clamps voltage transients on DC power rails or signal lines up to 1500W peak pulse power, protecting downstream components from surges like load dump or inductive kickback.