Alternatives to Taiwan Semiconductor LS4148
Taiwan Semiconductor LS4148 and its qualified second sources, compared on form/fit/function, stock, lifecycle and price — the same checks Parter runs inside a BOM.
 LS4148Taiwan Semiconductor |  LL4148Diotec Semiconductor |  LL4148-GS08Vishay General Semiconductor - Diodes Division | +3more | |
|---|---|---|---|---|
| FFF Compatibility | Both components are in the SOD-80C (MiniMELF) package and share the identical 2-pin anode/cathode pinout configuration.Both utilize the exact same SOD-80C glass cylinder package structure.The electrical parameters (75 V breakdown, 150 mA average current, 4 ns recovery) match, but the operating temperature is slightly narrower at the low end (-50°C to 175°C vs the original -55°C to 175°C). | Both components use the standard SOD-80 MiniMELF package with identical cathode band markings and footprint.Both are glass MiniMELF cylindrical packages with matching mechanical dimensions.Meets the 75 V breakdown and 4 ns speed while offering an upgraded current capacity of 300 mA and extended temperature range. | ||
 AI Summary | LS4148 by Taiwan Semiconductor: Diode 75 V 150mA Surface Mount SOD-80C. | The LL4148 is Diotec Semiconductor's official, active drop-in substitute for the obsolete LS4148. It maintains matching voltage, current, and reverse recovery characteristics in the identical SOD-80C glass MELF package. It is the most seamless replacement option if the 5-degree reduction in minimum operating temperature is acceptable.
| The LL4148-GS08 from Vishay is an outstanding drop-in replacement that meets or exceeds every electrical parameter of the obsolete LS4148. It boosts the forward current rating to 300 mA and extends the low-end operating temperature to -65°C. Suffixes like -GS08 represent standard high-volume active packaging options (2,500 parts per 7-inch reel).
| |
| Lifecycle Status | Obsolete | Obsolete | Active | |
| Market Availability | In stock | In stock | In stock | |
| REACH | REACH | REACH | REACH | |
| RoHS | RoHS | RoHS | RoHS | |
| Description | Diode 75 V 150mA Surface Mount SOD-80C | Diode 75 V 150mA Surface Mount LL-34 | Diode 75 V 300mA Surface Mount SOD-80 MiniMELF | |
| Manufacturer | Taiwan Semiconductor | Diotec Semiconductor | Vishay General Semiconductor - Diodes Division | |
| Type | Diodes | Diodes | Diodes | |
| Datasheet | Open | Open | Open | |
| Lead Time | 2 weeks | 6 weeks | 9 weeks | |
| Country of Origin | CN | - | - | |
| Export Control Class Number | EAR99 | EAR99 | EAR99 | |
| HTSUS Code | 8541.10.0070 | - | - | |
| Moisture Sensitivity Level | Not Applicable | - | - | |
| Speed | Small Signal =< 200mA (Io), Any Speed | - | - | |
| Technology | Standard | - | - | |
| Mounting Type | Surface Mount | - | - | |
| Package / Case | DO-213AC, MINI-MELF, SOD-80 | - | - | |
| Capacitance @ Vr, F | 4pF @ 0V, 1MHz | - | - | |
| Supplier Device Package | SOD-80C | - | - | |
| Reverse Recovery Time (trr) | 4 ns | - | - | |
| Current - Reverse Leakage @ Vr | 5 µA @ 75 V | - | - |
Unlock all 5 alternatives
- Find & compare verified second sources
- Spot risk early with real-time part monitoring
- Stay compliant and production-ready
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 Taiwan Semiconductor LS4148 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 Taiwan Semiconductor LS4148 are the LL4148 (Diotec Semiconductor) and the LL4148-GS08 (Vishay General Semiconductor - Diodes Division), 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 LS4148 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 LS4148 (Taiwan Semiconductor) is a part in the Diodes 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