# R4001F

**YFW** · Diodes - General Purpose · SMA

R4001F from YFW, in a SMA. 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 | Cathode | passive | Cathode terminal of the rectifier diode; the datasheet's pinning section lists pin 1 as Cathode for the R4000F thru R4001F SMA package. |
| 2 | Anode | passive | Anode terminal of the rectifier diode; the datasheet's pinning section lists pin 2 as Anode for the R4000F thru R4001F SMA package. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | YFW |
| Package | SMA |
| 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 Peak Reverse Voltage | VRRM |  |  | 4000 | V | R4001F column | 1 |
| Maximum RMS voltage | VRMS |  |  | 2800 | V | R4001F column | 1 |
| Maximum DC Blocking Voltage | VDC |  |  | 4000 | V | R4001F column | 1 |
| Maximum Average Forward Rectified Current | IF(AV) |  |  | 0.2 | A | at Tc = 125 °C | 1 |
| Peak Forward Surge Current | IFSM |  |  | 30 | A | 8.3 ms Single Half Sine Wave Superimposed on Rated Load | 1 |
| Maximum Instantaneous Forward Voltage | VF |  |  | 5 | V | at 0.2 A | 1 |
| Maximum DC Reverse Current | IR |  |  | 10 | μA | Ta = 25 °C at Rated DC Blocking Voltage | 1 |
| Maximum DC Reverse Current | IR |  |  | 200 | μA | Ta = 100 °C at Rated DC Blocking Voltage | 1 |
| Maximum reverse recovery time | TRR |  |  | 500 | nS | IF=0.5A IR=1.0A Irr=0.25A (Note 1) | 1 |
| Operating and Storage Temperature Range | Tj, Tstg | -55 |  | 150 | °C |  | 1 |

## CAD (KiCad official)

- Symbol: `R4001F`
- Footprint: `Diode_SMD:D_SMA`
- 3D model: SMA (KiCad packages3D, STEP)
- 3D model files: `r4001f-etched.step` / `r4001f-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `r4001f.step` / `r4001f.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [YFW datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590920298831028224) (3 pp, sha256 `86daa27821cfc37a`, retrieved 2026-10-15, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-5-5` (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/r4001f-datasheet.pdf)