Alternatives to STMicroelectronics 1.5KE39A
STMicroelectronics 1.5KE39A and its qualified second sources, compared on form/fit/function, stock, lifecycle and price — the same checks Parter runs inside a BOM.
 1.5KE39ASTMicroelectronics |  1.5KE39ALittelfuse Inc. |  1.5KE39A-E3/54Vishay General Semiconductor - Diodes Division | +2more | |
|---|---|---|---|---|
| FFF Compatibility | The part is supplied in an identical axial DO-201 package and matches the 2-pin unidirectional pinout.The physical body dimensions and lead spacing conform to the standard DO-201AA footprint.Matches the 33.3V reverse standoff voltage, 37.1V minimum breakdown voltage, and 53.9V maximum clamping voltage. | Utilizes the identical 1.5KE / DO-201 axial through-hole package and 2-pin configuration.Physical package dimensions and lead layout are a direct physical drop-in.Fully meets JEDEC specifications with 1500W power, 33.3V standoff, and 53.9V clamping voltage. | ||
 AI Summary | 1.5KE39A by STMicroelectronics: 53.9V Clamp 28.2A Ipp Tvs Diode Through Hole DO-201AE. | The Littelfuse 1.5KE39A is a direct, industry-standard drop-in replacement for the obsolete part. It features identical electrical parameters, including a 1500W peak pulse power rating and 33.3V reverse standoff voltage, ensuring seamless circuit protection with no board modifications.
| Vishay's TransZorb series equivalent offers an outstanding alternative with identical electrical capability and thermal limits. It provides identical 1500W surge protection and 33.3V working standoff voltage in the same standard DO-201AA axial package.
| |
| Lifecycle Status | Obsolete | Active | Active | |
| Market Availability | In stock | In stock | In stock | |
| REACH | REACH | REACH | REACH | |
| RoHS | RoHS | RoHS | RoHS | |
| Description | 53.9V Clamp 28.2A Ipp Tvs Diode Through Hole DO-201AE | 53.9V Clamp 28.2A Ipp Tvs Diode Through Hole DO-201 | 53.9V Clamp 27.8A Ipp Tvs Diode Through Hole 1.5KE | |
| Manufacturer | STMicroelectronics | Littelfuse Inc. | Vishay General Semiconductor - Diodes Division | |
| Type | Transient Voltage Suppressors (TVS) | Transient Voltage Suppressors (TVS) | Transient Voltage Suppressors (TVS) | |
| Datasheet | Open | Open | Open | |
| Lead Time | 18 weeks | 14 weeks | 15 weeks | |
| Country of Origin | CN | - | - | |
| Export Control Class Number | EAR99 | EAR99 | EAR99 | |
| HTSUS Code | 8541.10.0080 | - | - | |
| Moisture Sensitivity Level | - | - | - | |
| Type | Zener | - | - | |
| Applications | General Purpose | - | - | |
| Mounting Type | Through Hole | - | - | |
| Package / Case | DO-201AE, Axial | - | - | |
| Power - Peak Pulse | 1500W (1.5kW) | - | - |
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Frequently asked questions
Yes. The STMicroelectronics 1.5KE39A is marked obsolete, so the manufacturer has discontinued it and any remaining supply is limited to distributor stock. The qualified second sources on this page are active parts you can design in today.
The closest qualified second sources for the STMicroelectronics 1.5KE39A are the 1.5KE39A (Littelfuse Inc.) and the 1.5KE39A-E3/54 (Vishay General Semiconductor - Diodes Division), out of 4 matched alternatives in total. Each is compared against the original on fit, form and function in the table above.
Yes. The leading alternatives to the 1.5KE39A are fit-, form- and function-compatible — the same package and pinout with matching key electrical specifications — so they drop in without PCB changes. Always confirm the parameters critical to your design against the alternative's datasheet before committing.
The 1.5KE39A (STMicroelectronics) is a part in the Transient Voltage Suppressors (TVS) category. This page lists qualified, cross-referenced replacements for it with a side-by-side comparison.
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