Alternatives to Littelfuse 1N5908RL4G
Littelfuse 1N5908RL4G and its qualified second sources, compared on form/fit/function, stock, lifecycle and price — the same checks Parter runs inside a BOM.
 1N5908RL4GLittelfuse |  1N5907Microchip Technology |  1.5KE6.8ALittelfuse Inc. | +4more | |
|---|---|---|---|---|
| FFF Compatibility | Uses a DO-13 hermetically sealed metal package instead of the original plastic DO-201AD package, which has slightly different physical dimensions and requires checking lead spacing.DO-13 metal can body differs visually and physically from the original axial plastic body, though it remains a 2-lead through-hole device.Perfect functional match with identical 5.0V reverse standoff voltage, 6.0V breakdown voltage, and low 8.5V clamping voltage. | Matches the physical 2-pin axial DO-201 packaging, allowing it to drop directly into the existing PCB footprint and hole sizes.Same axial molded plastic body structure, mounting style, and lead dimensions.The reverse standoff voltage is slightly higher at 5.8V (vs 5.0V) and the max clamping voltage is higher at 10.5V (vs 8.5V). | ||
 AI Summary | 1N5908RL4G by Littelfuse: 8.5V Clamp Ipp Tvs Diode Through Hole Axial. | The 1N5907 is the closest electrical equivalent available for the obsolete 1N5908RL4G. It maintains the identical low clamping voltage of 8.5V for 5V TTL systems but is housed in a hermetically sealed DO-13 metal package instead of a plastic axial case. This option is active but has a much higher price point due to the specialized military-grade metal packaging.
| The 1.5KE6.8A is the manufacturer-suggested functional alternative for the obsolete 1N5908 series in a DO-201 package. While it fits perfectly physically, engineers must ensure the slightly higher clamping voltage of 10.5V (compared to 8.5V) is safe for downstream sensitive 5V logic circuitry. This is a very active, highly available, and inexpensive standard part.
| |
| Lifecycle Status | Obsolete | Active | Active | |
| Market Availability | Discontinued | In stock | In stock | |
| REACH | REACH | REACH | REACH | |
| RoHS | RoHS | RoHS | RoHS | |
| Description | 8.5V Clamp Ipp Tvs Diode Through Hole Axial | 8.5V Clamp 120A Ipp Tvs Diode Through Hole DO-13 (DO-202AA) | 10.5V Clamp 144.8A Ipp Tvs Diode Through Hole DO-201 | |
| Manufacturer | Littelfuse | Microchip Technology | Littelfuse Inc. | |
| Type | Transient Voltage Suppressors (TVS) | Transient Voltage Suppressors (TVS) | Transient Voltage Suppressors (TVS) | |
| Datasheet | Open | Open | Open | |
| Lead Time | 20 weeks | 52 weeks | 14 weeks | |
| Country of Origin | PH | - | - | |
| 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-201AD, Axial | - | - | |
| Power - Peak Pulse | 1500W (1.5kW) | - | - | |
| Operating Temperature | -65°C ~ 175°C (TJ) | - | - | |
| Power Line Protection | No | - | - | |
| Supplier Device Package | Axial | - | - |
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Related parts
| Part | Market availability | Lifecycle | Alternatives available |
|---|---|---|---|
 1N5908onsemi | In stock | Obsolete | 3Alternatives availableSee Alternatives |
 1N5240BTRDiodes Incorporated | Non-stock | Obsolete | 3Alternatives availableSee Alternatives |
 1N5820STMicroelectronics | Discontinued | Obsolete | 6Alternatives availableSee Alternatives |
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Frequently asked questions
Yes. The Littelfuse 1N5908RL4G 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 Littelfuse 1N5908RL4G are the 1N5907 (Microchip Technology) and the 1.5KE6.8A (Littelfuse Inc.), out of 6 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 1N5908RL4G 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 1N5908RL4G (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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