Alternatives to Littelfuse 1.5KE540A
Littelfuse 1.5KE540A and its qualified second sources, compared on form/fit/function, stock, lifecycle and price — the same checks Parter runs inside a BOM.
 1.5KE540ALittelfuse |  1.5KE540A-E3/54Vishay General Semiconductor - Diodes Division | 1.5KE540A-E3/73Vishay General Semiconductor - Diodes Division | +2more | |
|---|---|---|---|---|
| FFF Compatibility | Both parts share the identical physical DO-201AA / DO-27 axial leaded package with matching dimensions and 2-pin polarity.Same axial mounting style and physical body envelope.Both diodes have a 513V minimum breakdown voltage, 459V/460V reverse standoff voltage, 740V clamping voltage, and a 1500W peak pulse power rating. | Both parts share the identical physical DO-201AA / DO-27 axial leaded package with matching dimensions.Same axial mounting style and physical body envelope.Identical clamping voltage (740V), breakdown voltage (513V Min), and 1500W peak pulse power rating. | ||
 AI Summary | 1.5KE540A by Littelfuse: 740V Clamp 2.8A Ipp Tvs Diode Through Hole DO-201. | This is a direct, drop-in commercial substitute from Vishay's TransZorb® series, matching all critical electrical ceilings and thermal ratings. It comes in 13-inch tape and reel packaging.
| This is the exact same high-performance semiconductor die as the -E3/54 variant but supplied in Tape & Ammo Box (packaging code 73) instead of Tape & Reel.
| |
| Lifecycle Status | Active | Active | Active | |
| Market Availability | In stock | In stock | Non-stock | |
| REACH | REACH | REACH | REACH | |
| RoHS | RoHS | RoHS | RoHS | |
| Description | 740V Clamp 2.8A Ipp Tvs Diode Through Hole DO-201 | 740V Clamp 2.03A Ipp Tvs Diode Through Hole 1.5KE | 740V Clamp 2.03A Ipp Tvs Diode Through Hole 1.5KE | |
| Manufacturer | Littelfuse | Vishay General Semiconductor - Diodes Division | Vishay General Semiconductor - Diodes Division | |
| Type | Transient Voltage Suppressors (TVS) | Transient Voltage Suppressors (TVS) | Transient Voltage Suppressors (TVS) | |
| Datasheet | Open | Open | Open | |
| Lead Time | 14 weeks | 16 weeks | 13 weeks | |
| Country of Origin | - | - | - | |
| 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) | - | - | |
| Operating Temperature | -55°C ~ 175°C (TJ) | - | - | |
| Power Line Protection | No | - | - | |
| Supplier Device Package | DO-201 | - | - |
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Related parts
| Part | Market availability | Lifecycle | Alternatives available |
|---|---|---|---|
 1.5KE440CASTMicroelectronics | In stock | Obsolete | 4Alternatives availableSee Alternatives |
 1.5KE15Aonsemi | In stock | Obsolete | 4Alternatives availableSee Alternatives |
| 1.5KE43Aonsemi | In stock | Obsolete | 7Alternatives availableSee Alternatives |
| 1.5KE220ASTMicroelectronics | In stock | Obsolete | 4Alternatives availableSee Alternatives |
 1.5KE47CATaiwan Semiconductor | Discontinued | Obsolete | 5Alternatives availableSee Alternatives |
 1.5KE62Aonsemi | Discontinued | Obsolete | 8Alternatives availableSee Alternatives |
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Frequently asked questions
Yes. The Littelfuse 1.5KE540A is active and in production. The parts listed here are qualified equivalents if you need a second source or better availability.
The closest qualified second sources for the Littelfuse 1.5KE540A are the 1.5KE540A-E3/54 (Vishay General Semiconductor - Diodes Division) and the 1.5KE540A-E3/73 (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.
Not always. The alternatives to the 1.5KE540A 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 1.5KE540A (Littelfuse) 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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