# US1GW

**YFW** · Diodes - Fast Recovery Rectifiers · SOD-123FL

US1GW from YFW, in a SOD-123FL. 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 US1GW ultrafast rectifier (400 V VRRM, 1 A average forward current). |
| 2 | Anode | passive | Anode terminal of the US1GW ultrafast rectifier (400 V VRRM, 1 A average forward current). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | YFW |
| Package | SOD-123FL |
| 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 |  |  | 400 | V |  | 1 |
| Maximum RMS Voltage | VRMS |  |  | 280 | V |  | 1 |
| Maximum DC Blocking Voltage | VDC |  |  | 400 | V |  | 1 |
| Maximum Average Forward Rectified Current | IF(AV) |  |  | 1 | A | 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 |  |  | 1.25 | V | at 1 A | 1 |
| Maximum DC Reverse Current | IR |  |  | 5 | μA | Ta = 25 °C, at rated DC blocking voltage | 1 |
| Maximum DC Reverse Current | IR |  |  | 100 | μA | Ta = 125 °C, at rated DC blocking voltage | 1 |
| Maximum Reverse Recovery Time | Trr |  |  | 50 | nS | IF=0.5A, IR=1A, Irr=0.25A | 1 |
| Operating and Storage Temperature Range | Tj, Tstg | -55 |  | 150 | °C |  | 1 |
| Typical Thermal Resistance | RθJA |  | 85 |  | °C/W | P.C.B. mounted with 2.0" X 2.0" (5 X 5 cm) copper pad areas | 1 |

## CAD (KiCad official)

- Symbol: `US1GW`
- Footprint: `Diode_SMD:D_SOD-123F`
- 3D model: SOD-123FL (KiCad packages3D, STEP)
- 3D model files: `us1gw-etched.step` / `us1gw-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `us1gw.step` / `us1gw.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [YFW datasheet](docs/us1gw-datasheet.pdf) (4 pp, sha256 `2631f2dacd53fc28`, retrieved 2026-10-22, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-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/us1gw-datasheet.pdf)