Alternatives to Littelfuse 1N6373G
Littelfuse 1N6373G and its qualified second sources, compared on form/fit/function, stock, lifecycle and price — the same checks Parter runs inside a BOM.
 1N6373GLittelfuse |  1.5KE6.8ALittelfuse Inc. |  1.5KE6.8A-E3/54Vishay General Semiconductor - Diodes Division | +1more | |
|---|---|---|---|---|
| FFF Compatibility | Both parts are 2-pin through-hole axial devices with matching cathode band polarity configuration.Standard DO-201AA package directly interchanges with the original DO-201AD / Axial package footprint.The 1.5KE6.8A has a slightly higher reverse standoff voltage (5.8V vs 5.0V), a higher breakdown voltage (6.45V vs 6.0V), and a higher clamping voltage (10.5V vs 9.4V) which offers slightly less protection margin. | Standard THT 2-pin axial layout with equivalent cathode-band polarity assignment.The 1.5KE/DO-201AA package matches the physical envelope and mounting pitch of the legacy DO-201AD package.The breakdown (6.45V), standoff (5.8V), and clamping (10.5V) ratings are slightly higher than those of the original 1N6373G. | ||
 AI Summary | 1N6373G by Littelfuse: 9.4V Clamp Ipp Tvs Diode Through Hole Axial. | The 1.5KE6.8A is the active, manufacturer-recommended substitute for the obsolete 1N6373G. It maintains the 1500W power handling capability but operates at slightly shifted voltage thresholds, with a 5.8V standoff and 10.5V clamping limit. This part represents the closest active counterpart currently available in the Littelfuse portfolio.
| This is an active TransZorb series part from Vishay that serves as a highly reliable second-source equivalent to the 1.5KE6.8A. It offers identical electrical parameters to the Littelfuse substitute, matching the 1500W power rating in the same axial profile. It is an excellent choice for replacing the obsolete 1N6373G when sourcing from Vishay is preferred.
| |
| Lifecycle Status | Obsolete | Active | Active | |
| Market Availability | Discontinued | In stock | In stock | |
| REACH | REACH | REACH | REACH | |
| RoHS | RoHS | RoHS | RoHS | |
| Description | 9.4V Clamp Ipp Tvs Diode Through Hole Axial | 10.5V Clamp 144.8A Ipp Tvs Diode Through Hole DO-201 | 10.5V Clamp 143A Ipp Tvs Diode Through Hole 1.5KE | |
| Manufacturer | Littelfuse | 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 | 20 weeks | 14 weeks | 16 weeks | |
| Country of Origin | MY | - | - | |
| 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 |
|---|---|---|---|
 1N6377GLittelfuse | Discontinued | Obsolete | 4Alternatives availableSee Alternatives |
| 1N6373RL4GLittelfuse | Discontinued | Obsolete | 5Alternatives availableSee Alternatives |
 1N6285AGLittelfuse | Discontinued | Obsolete | 4Alternatives availableSee Alternatives |
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Frequently asked questions
Yes. The Littelfuse 1N6373G 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 1N6373G are the 1.5KE6.8A (Littelfuse Inc.) and the 1.5KE6.8A-E3/54 (Vishay General Semiconductor - Diodes Division), out of 3 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 1N6373G 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 1N6373G (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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