Alternatives to Littelfuse 1N6377G
Littelfuse 1N6377G and its qualified second sources, compared on form/fit/function, stock, lifecycle and price — the same checks Parter runs inside a BOM.
 1N6377GLittelfuse |  LCE15ALittelfuse Inc. | 1.5KE18ALittelfuse Inc. | +2more | |
|---|---|---|---|---|
| FFF Compatibility | Both parts use the DO-201/DO-27 axial through-hole package with matching anode and cathode pins (indicated by a color band on the body).Both devices are axial leaded, through-hole packages with extremely similar body lengths and lead diameters.The breakdown voltage range is slightly lower (16.7V minimum vs 17.6V minimum on the original 1N6377G), though clamping protection is improved. | Matches the DO-201AA physical mounting and standard 2-pin axial lead orientation perfectly.Standard axial form factor matches original dimensions.The standoff voltage is slightly higher (15.3V vs 15V), breakdown voltage is slightly lower (17.1V vs 17.6V), and clamping is slightly higher (25.2V vs 25V). | ||
 AI Summary | 1N6377G by Littelfuse: 25V Clamp Ipp Tvs Diode Through Hole Axial. | The LCE15A is an active equivalent from Littelfuse that matches the original 15V reverse standoff voltage and 1500W peak power. It features a slightly lower minimum breakdown voltage (16.7V vs 17.6V) but provides a tighter, improved clamping voltage of 24.4V to keep downstream components safer.
| The 1.5KE18A is a highly popular, active industry-standard TVS diode. It has very similar electrical parameters (15.3V standoff, 17.1V minimum breakdown, and 25.2V clamping) and serves as an excellent replacement in the identical DO-201 footprint.
| |
| Lifecycle Status | Obsolete | Active | Active | |
| Market Availability | Discontinued | In stock | In stock | |
| REACH | REACH | REACH | REACH | |
| RoHS | RoHS | RoHS | RoHS | |
| Description | 25V Clamp Ipp Tvs Diode Through Hole Axial | 24.4V Clamp 61A Ipp Tvs Diode Through Hole DO-201 | 25.2V Clamp 60.3A Ipp Tvs Diode Through Hole DO-201 | |
| Manufacturer | Littelfuse | Littelfuse Inc. | Littelfuse Inc. | |
| Type | Transient Voltage Suppressors (TVS) | Transient Voltage Suppressors (TVS) | Transient Voltage Suppressors (TVS) | |
| Datasheet | Open | Open | Open | |
| Lead Time | 20 weeks | 14 weeks | 14 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-201AD, Axial | - | - | |
| Power - Peak Pulse | 1500W (1.5kW) | - | - | |
| Operating Temperature | -65°C ~ 175°C (TJ) | - | - | |
| Power Line Protection | No | - | - | |
| Supplier Device Package | Axial | - | - |
Unlock all 4 alternatives
- Find & compare verified second sources
- Spot risk early with real-time part monitoring
- Stay compliant and production-ready
Related parts
| Part | Market availability | Lifecycle | Alternatives available |
|---|---|---|---|
 1N6373GLittelfuse | Discontinued | Obsolete | 3Alternatives availableSee Alternatives |
| 1N6373RL4GLittelfuse | Discontinued | Obsolete | 5Alternatives availableSee Alternatives |
 1N6285AGLittelfuse | Discontinued | Obsolete | 4Alternatives availableSee Alternatives |
You searched one part. Parter watches your whole BOM.
All your BOM, at once
Parter maps every line to live stock, lead time, lifecycle and compliance data across the entire market — not part by part.
Hear about problems before they hit production
Allocation, EOL and last-time-buy notices surface the moment they appear, not when your buyer's PO bounces.
Qualified replacements in minutes, not days
Every at-risk line gets form-fit-function matches like the ones above — deltas flagged, evidence attached. Review, push to your BOM, and Parter starts watching the new part too.
Frequently asked questions
Yes. The Littelfuse 1N6377G 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 1N6377G are the LCE15A (Littelfuse Inc.) and the 1.5KE18A (Littelfuse Inc.), 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 1N6377G 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 1N6377G (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.
Schedule a demo
See Parter in action
Discover how Parter can help your hardware team:
- Streamline your hardware operations with AI
- Detect and prevent lifecycle disruptions
- Accelerate product development
- Stay compliant and production-ready