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Vishay General Semiconductor - Diodes Division 1.5KE56HE3/73 — Circuit Protection

Vishay 1.5KE56HE3/73 TVS, 1500W, 45.4V Standoff, AEC-Q101

MPN1.5KE56HE3/73
Obsolete

Vishay General Semiconductor - Diodes Division, Automotive AEC-Q101 TransZorb® TVS, 1.5KE56HE3/73, Zener type, 1500W peak pulse, 45.4V reverse standoff, DO-201AA axial, through hole.

Vishay General Semiconductor - Diodes Division 1.5KE56HE3/73 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

1.5KE56HE3/73 specifications
ParameterValue
TypeZener
SeriesAutomotive, AEC-Q101, TransZorb®
MountingThrough Hole
Voltage - breakdown50.4V
Voltage - clamping (Max) @ ipp80.5V
Voltage - reverse standoff45.4V
Current - peak pulse (10/1000μs)18.6A
Power - peak pulse1500W (1.5kW)
Power line protectionNo
Operating temperature-55°C~175°C(TJ)
PackageTape & Box (TB)
ApplicationsAutomotive
CaseDO-201AA, DO-27, Axial
Unidirectional channels1

Product details

Obsolete automotive TVS — what the ratings mean for fit

The 1.5KE56HE3/73: The 45.4 V reverse standoff voltage means it clamps transients on a nominal 36 V or 42 V automotive bus — the 50.4 V minimum breakdown ensures the diode stays off during normal battery ripple, while the 80.5 V clamping at 18.6 A peak pulse current limits the spike seen by downstream electronics. The single unidirectional channel protects one signal or power rail per device.

Sourcing an obsolete part

Because the 1.5KE56HE3/73 is a standard DO-201AA axial package, a functionally equivalent TVS with the same standoff voltage and peak pulse rating can be cross-referenced if the exact Vishay code is dry. Confirm the breakdown and clamping thresholds against the BOM before substituting.

Frequently asked questions

What compliance documentation does Vishay provide for 1.5KE56HE3/73?

The part is AEC-Q101 qualified, which includes automotive-grade reliability testing and PPAP documentation. RoHS and REACH compliance data is available from Vishay for the TransZorb series.