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Vishay General Semiconductor - Diodes Division 1.5KE12A-E3/51 — Circuit Protection

1.5KE12A-E3/51 Vishay TVS, 1500W, 10.2V Standoff, DO-201AA

MPN1.5KE12A-E3/51
Last Buy

Vishay General Semiconductor TransZorb® series, TVS Zener, unidirectional, 1500W peak pulse, 10.2V reverse standoff, 16.7V clamping, DO-201AA axial, bulk.

$0.7268Ref. price · indicative, final on quote
Vishay General Semiconductor - Diodes Division 1.5KE12A-E3/51 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

1.5KE12A-E3/51 specifications
ParameterValue
TypeZener
SeriesTransZorb®
MountingThrough Hole
Voltage - breakdown11.4V
Voltage - clamping (Max) @ ipp16.7V
Voltage - reverse standoff10.2V
Current - peak pulse (10/1000μs)89.8A
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

Last-buy TVS for 12V rail clamping

The 1.5KE12A-E3/51: Packaged in the DO-201AA (DO-27) axial leaded form, it suits through-hole board layouts where a single device guards a power entry or DC bus against surges per IEC 61000-4-5.

Sourcing posture for a Last-Buy part

Vishay has marked the 1.5KE12A-/51 as Last Buy. This means the manufacturer is no longer accepting new orders beyond a defined window — the part is on a path to end-of-life. For new designs, a pin-compatible alternative from the same TransZorb family should be evaluated. Available through independent distribution channels on a quoted-to-order basis.

A 12V rail with a 16.7V clamp leaves margin for a downstream regulator's abs-max input rating — typical 12V-to-5V LDOs tolerate 20V for short pulses. The 10.2V reverse standoff voltage means the diode does not conduct at the normal 12V rail voltage, drawing only leakage current until a transient exceeds the breakdown threshold of 11.4V minimum.

Frequently asked questions

What is the closest pin-compatible alternative to the 1.5KE12A-/51?

Within the same TransZorb family, a functionally equivalent unidirectional TVS with the same 1500W rating, 10.2V standoff, and DO-201AA package is the 1.5KE12A (base product number). Verify the exact suffix for your procurement code — the -/51 variant indicates a specific packaging and lead-finish option.