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Vishay General Semiconductor - Diodes Division 1.5KE27HE3/73 — Circuit Protection

1.5KE27HE3/73 Vishay TVS Diode, 1500W, 21.8V Standoff

MPN1.5KE27HE3/73
Obsolete

Vishay General Semiconductor - Diodes Division, Automotive AEC-Q101 TransZorb® TVS, Zener type, 1.5KE27HE3/73, 1500W peak pulse, 21.8V standoff, DO-201AA axial.

Vishay General Semiconductor - Diodes Division 1.5KE27HE3/73 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

1.5KE27HE3/73 specifications
ParameterValue
TypeZener
SeriesAutomotive, AEC-Q101, TransZorb®
MountingThrough Hole
Voltage - breakdown24.3V
Voltage - clamping (Max) @ ipp39.1V
Voltage - reverse standoff21.8V
Current - peak pulse (10/1000μs)38.4A
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

What the ratings mean for your BOM

The 1.5KE27HE3/73: The 21.8 V reverse standoff is the maximum continuous DC voltage the diode blocks without conducting leakage — a 24 V automotive battery rail at 28 V during charging sits above this, so the TVS would be in standby conduction. The 24.3 V minimum breakdown ensures the device starts clamping before the protected circuit's absolute maximum rating is reached. The 39.1 V clamp at 38.4 A limits the voltage spike seen by downstream components during an inductive load dump or alternator surge.

Lifecycle reality — obsolete, sourced to order

Vishay has marked the 1.5KE27HE3/73 as obsolete.

Frequently asked questions

What is the 1.5KE27HE3/73 used for?

It protects automotive 24 V DC rails from load dump and surge transients, clamping at 39.1 V.

Where can I buy the 1.5KE27HE3/73?

Submit an RFQ for current availability and pricing — each lot is confirmed at quote time.