Alternatives to onsemi 1.5KE43A
onsemi 1.5KE43A and its qualified second sources, compared on form/fit/function, stock, lifecycle and price — the same checks Parter runs inside a BOM.
 1.5KE43Aonsemi |  1.5KE43ALittelfuse Inc. | 1.5KE43A-E3/54Vishay General Semiconductor - Diodes Division | +5more | |
|---|---|---|---|---|
| FFF Compatibility | Matches DO-201 / DO-201AA axial package with identical pin assignments (Pin 1: Cathode via band, Pin 2: Anode).Interchangeable axial physical package style, lead spacing, and body size (5.4mm x 7.5mm typical).Meets or exceeds all performance specs including 1500W peak pulse power, 36.8V standoff, and 59.3V clamping voltage. | Identical 2-pin axial DO-201 / DO-27 package with matching anode/cathode orientation.Direct physical drop-in with interchangeable axial package dimensions.Fully matches JEDEC electrical parameters: 36.8V reverse standoff voltage, 40.9V minimum breakdown voltage, and 59.3V maximum clamping voltage. | ||
 AI Summary | 1.5KE43A by onsemi: Clamp Ipp Tvs Diode Through Hole DO-201. | This is an active, industry-standard direct drop-in replacement with identical electrical characteristics and physical outline. It provides high-reliability overvoltage protection matching the original STMicroelectronics baseline.
| An active, highly reliable TransZorb® series alternative. The suffix '-E3/54' confirms commercial-grade tape-and-reel packaging under RoHS compliant standards.
| |
| Lifecycle Status | Obsolete | Unknown | Unknown | |
| Market Availability | In stock | Unknown | Unknown | |
| REACH | REACH | Unknown | Unknown | |
| RoHS | RoHS | Unknown | Unknown | |
| Description | Clamp Ipp Tvs Diode Through Hole DO-201 | This is an active, industry-standard direct drop-in replacement with identical electrical characteristics and physical outline. It provides | An active, highly reliable TransZorb® series alternative. The suffix '-E3/54' confirms commercial-grade tape-and-reel packaging under RoHS c | |
| Manufacturer | onsemi | Littelfuse Inc. | Vishay General Semiconductor - Diodes Division | |
| Type | Transient Voltage Suppressors (TVS) | Component | Component | |
| Datasheet | Open | N/A | N/A | |
| Lead Time | 7 weeks | Unknown | Unknown | |
| Country of Origin | CN | - | - | |
| Export Control Class Number | EAR99 | EAR99 | EAR99 | |
| HTSUS Code | 8541.10.0080 | - | - | |
| Moisture Sensitivity Level | 1 (Unlimited) | - | - | |
| Type | Zener | - | - | |
| Applications | General Purpose | - | - | |
| Mounting Type | Through Hole | - | - | |
| Package / Case | DO-201AA, DO-27, Axial | - | - | |
| Power - Peak Pulse | 1500W (1.5kW) | - | - | |
| Power Line Protection | No | - | - | |
| Supplier Device Package | DO-201 | - | - | |
| Unidirectional Channels | 1 | - | - |
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Related parts
| Part | Market availability | Lifecycle | Alternatives available |
|---|---|---|---|
 1.5KE33ASTMicroelectronics | In stock | Obsolete | 8Alternatives availableSee Alternatives |
 1.5KE39ASTMicroelectronics | In stock | Obsolete | 4Alternatives availableSee Alternatives |
 1.5KE540ALittelfuse | In stock | Active | 4Alternatives availableSee Alternatives |
 1.5KE36CASTMicroelectronics | In stock | Obsolete | 6Alternatives availableSee Alternatives |
 1.5KE47CATaiwan Semiconductor | Discontinued | Obsolete | 5Alternatives availableSee Alternatives |
| 1.5KE440CASTMicroelectronics | In stock | Obsolete | 4Alternatives availableSee Alternatives |
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Frequently asked questions
Yes. The onsemi 1.5KE43A 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 onsemi 1.5KE43A are the 1.5KE43A (Littelfuse Inc.) and the 1.5KE43A-E3/54 (Vishay General Semiconductor - Diodes Division), out of 7 matched alternatives in total. Each is compared against the original on fit, form and function in the table above.
Not always. The alternatives to the 1.5KE43A are matched on function but can differ in package, pinout or a key parameter, so review the fit/form/function notes in the table and the datasheet before designing one in.
The 1.5KE43A (onsemi) 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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