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.
Equivalent and substitute parts for Littelfuse 1N6373G
 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 | |
| ——— ———— | ————— ——— ———— | ———— —————— | —— ————— ——— | |
| —————— —— | ——————— ———— | ————— ——— ———— | ———— —————— | |
| ———— ——— | —— ————— ——— | ——————— ———— | ————— ——— ———— | |
| —— ————— | ———— —————— | —— ————— ——— | ——————— ———— | |
| ——— ———— | ————— ——— ———— | ———— —————— | —— ————— ——— | |
| —————— —— | ——————— ———— | ————— ——— ———— | ———— —————— | |
| ———— ——— | —— ————— ——— | ——————— ———— | ————— ——— ———— | |
| —— ————— | ———— —————— | —— ————— ——— | ——————— ———— |
Unlock all 3 alternatives
Sign in with your work email to read every gated row on this table — description, lead time, origin, export control and the full technical data.
Sign in to unlockSigning in creates a free Parter account. We use your name and email to contact you about Parter — see our Privacy Policy.
- 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 |
|---|---|---|---|
 1N6377GLittelfuse | Discontinued | Obsolete | 4Alternatives availableSee Alternatives |
| 1N6373RL4GLittelfuse | Discontinued | Obsolete | 5Alternatives availableSee Alternatives |
 1N4734Aonsemi | In stock | Obsolete | 4Alternatives availableSee Alternatives |
 1N4371Aonsemi | Discontinued | Obsolete | 5Alternatives availableSee Alternatives |
 1N4007GDiodes Incorporated | In stock | Active | 9Alternatives availableSee Alternatives |
 4N37onsemi | Discontinued | Obsolete | 5Alternatives 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 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.
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