Alternatives to Littelfuse 1N6373RL4G
Littelfuse 1N6373RL4G and its qualified second sources, compared on form/fit/function, stock, lifecycle and price — the same checks Parter runs inside a BOM.
 1N6373RL4GLittelfuse |  1.5KE6.8ALittelfuse Inc. |  1.5KE6.8A-E3/54Vishay General Semiconductor | +3more | |
|---|---|---|---|---|
| FFF Compatibility | The part is a 2-pin axial through-hole device fitting the same DO-201 package standard.Matches the standard DO-201 physical dimensions and through-hole mounting.Voltage specifications are slightly higher: reverse standoff of 5.8V vs 5.0V, and max clamping of 10.5V vs 9.4V. | Uses the identical 2-pin axial standard DO-201AA footprint.Standard DO-201AA package shape and dimensions.Has a slightly higher reverse standoff of 5.8V and clamping voltage of 10.5V. | ||
 AI Summary | 1N6373RL4G by Littelfuse: 9.4V Clamp Ipp Tvs Diode Through Hole Axial. | This is the official manufacturer-recommended alternative to replace the obsolete 1N6373 series, providing identical physical dimensions and power handling with slightly modified voltage thresholds.
| An excellent active second-source option based on Vishay's reputable TransZorb® series, matching the form factor and power handling of the Littelfuse replacement.
| |
| 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 | |
| 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 | 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-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 |
|---|---|---|---|
 1N6373GLittelfuse | Discontinued | Obsolete | 3Alternatives availableSee Alternatives |
| 1N6377GLittelfuse | Discontinued | Obsolete | 4Alternatives availableSee Alternatives |
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Frequently asked questions
Yes. The Littelfuse 1N6373RL4G 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 1N6373RL4G are the 1.5KE6.8A (Littelfuse Inc.) and the 1.5KE6.8A-E3/54 (Vishay General Semiconductor), out of 5 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 1N6373RL4G 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 1N6373RL4G (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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