component
UF4001
Public Made by Adomby adom
onsemi Fast Recovery / High Efficiency Diodes, DO-41. Unpolarised two-terminal part: the datasheet prints no pin numbers, so pins 1 and 2 follow the library convention, KiCad symbol/footprint/3D.
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UF4001
onsemi · Fast Recovery / High Efficiency Diodes · DO-41
UF4001 from onsemi, in a DO-41. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | K | passive | Cathode: the banded/marked end per the datasheet; pad 1 of the KiCad diode footprint. |
| 2 | A | passive | Anode. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| Package | DO-41 |
| Category | Diodes |
| Pins | 2 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Maximum Repetitive Reverse Voltage | VRRM | 50 | V | 2 | |||
| Average Rectified Forward Current | IF(AV) | 1 | A | .375 in lead length at TA = 75C | 2 | ||
| Non-Repetitive Peak Forward Surge Current | IFSM | 30 | A | 8.3 ms single half-sine-wave | 2 | ||
| Storage Temperature Range | TSTG | -65 | 150 | C | 2 | ||
| Operating Junction Temperature | TJ | -65 | 150 | C | 2 | ||
| Power Dissipation | PD | 2.08 | W | TA = 25C (table note) | 3 | ||
| Thermal Resistance, Junction-to-Ambient | RJA | 60 | C/W | 3 | |||
| Thermal Resistance, Junction-to-Lead | RJL | 30 | C/W | 3 | |||
| Maximum Reverse Current at Rated VR, TA = 25C | IR | 10 | A | TA = 25C, at rated VR | 3 | ||
| Maximum Reverse Current at Rated VR, TA = 100C | IR | 50 | A | TA = 100C, at rated VR | 3 | ||
| Maximum Total Capacitance | CT | 17 | pF | VR = 4.0 V, f = 1.0 MHz | 3 |
CAD (KiCad official)
- Symbol:
UF4001 - Footprint:
Diode_THT:D_DO-41_SOD81_P10.16mm_Horizontal - 3D model: DO-41 (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: onsemi datasheet (6 pp, sha256
a80fdf8c97757dc6, retrieved 2026-10-15, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins, primarycathode-band convention(convention), consensusoff(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).
# UF4001
**onsemi** · Fast Recovery / High Efficiency Diodes · DO-41
UF4001 from onsemi, in a DO-41. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
## Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | K | passive | Cathode: the banded/marked end per the datasheet; pad 1 of the KiCad diode footprint. |
| 2 | A | passive | Anode. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| Package | DO-41 |
| Category | Diodes |
| Pins | 2 |
## Electrical characteristics
Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Maximum Repetitive Reverse Voltage | VRRM | | | 50 | V | | 2 |
| Average Rectified Forward Current | IF(AV) | | | 1 | A | .375 in lead length at TA = 75C | 2 |
| Non-Repetitive Peak Forward Surge Current | IFSM | | | 30 | A | 8.3 ms single half-sine-wave | 2 |
| Storage Temperature Range | TSTG | -65 | | 150 | C | | 2 |
| Operating Junction Temperature | TJ | -65 | | 150 | C | | 2 |
| Power Dissipation | PD | | | 2.08 | W | TA = 25C (table note) | 3 |
| Thermal Resistance, Junction-to-Ambient | RJA | | | 60 | C/W | | 3 |
| Thermal Resistance, Junction-to-Lead | RJL | | | 30 | C/W | | 3 |
| Maximum Reverse Current at Rated VR, TA = 25C | IR | | | 10 | A | TA = 25C, at rated VR | 3 |
| Maximum Reverse Current at Rated VR, TA = 100C | IR | | | 50 | A | TA = 100C, at rated VR | 3 |
| Maximum Total Capacitance | CT | | | 17 | pF | VR = 4.0 V, f = 1.0 MHz | 3 |
## CAD (KiCad official)
- Symbol: `UF4001`
- Footprint: `Diode_THT:D_DO-41_SOD81_P10.16mm_Horizontal`
- 3D model: DO-41 (KiCad packages3D, STEP)
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [onsemi datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590169207942766592) (6 pp, sha256 `a80fdf8c97757dc6`, retrieved 2026-10-15, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins`, primary `cathode-band convention` (convention), consensus `off` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).
[Datasheet PDF](docs/uf4001-datasheet.pdf)