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Vishay General Semiconductor - Diodes Division 1.5KE33A/54 — Circuit Protection

1.5KE33A/54 Vishay TransZorb TVS, 1500W, 28.2V Standoff

MPN1.5KE33A/54
Obsolete

Vishay General Semiconductor - Diodes Division TransZorb® Zener TVS diode, 1.5KE33A/54, 1500W peak pulse power, 28.2V reverse standoff, 45.7V clamping, DO-201AA axial, Tape & Reel.

Vishay General Semiconductor - Diodes Division 1.5KE33A/54 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

1.5KE33A/54 specifications
ParameterValue
TypeZener
SeriesTransZorb®
MountingThrough Hole
Voltage - breakdown31.4V
Voltage - clamping (Max) @ ipp45.7V
Voltage - reverse standoff28.2V
Current - peak pulse (10/1000μs)32.8A
Power - peak pulse1500W (1.5kW)
Power line protectionNo
Operating temperature-55°C~175°C(TJ)
PackageTape & Reel (TR)
ApplicationsGeneral Purpose
CaseDO-201AA, DO-27, Axial
Unidirectional channels1

Product details

What the ratings mean for your circuit

The 1.5KE33A/54: The reverse standoff voltage is 28.2 V typical — the diode draws negligible leakage below this level, making it suitable for 24 V rails where the nominal bus stays under 28 V. Breakdown occurs at 31.4 V minimum (the avalanche threshold), and the device handles 32.8 A peak pulse current (Ipp) at the 10/1000 µs test condition — this current rating tells you the surge energy the diode can absorb without failing short.

Supplied in a DO-201AA (DO-27) axial-lead package, through-hole mount — the leads are tin-plated copper and the body is molded epoxy with a 1.5KE marking.

Frequently asked questions

What is the closest pin-compatible alternative to the 1.5KE33A/54?

A functionally equivalent TVS with the same 1500 W rating, 28.2 V standoff, and DO-201AA package would need to be selected from the broader TransZorb family or a competing brand — confirm the clamping voltage and breakdown tolerance against your circuit's surge requirement.