# MUR1040DC

**YFW** · Fast Recovery / High Efficiency Diodes · TO-263

MUR1040DC from YFW, in a TO-263. 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 | A1 | passive | Anode of the first rectifier leg (PIN 1), rated 400 V VRRM and 5 A average forward current per leg. |
| 2 | K | passive | Common cathode of both legs (PIN 2, center lead and tab), 400 V DC blocking voltage, 10 A total average forward current. |
| 3 | A2 | passive | Anode of the second rectifier leg (PIN 3), rated 400 V VRRM and 5 A average forward current per leg. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | YFW |
| Package | TO-263 |
| Category | Diodes |
| Pins | 3 |

## 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 DC Blocking Voltage | VDC |  |  | 400 | V |  | 1 |
| Maximum Average Forward Rectified Current, Per Leg | Io |  |  | 5 | A | Per Leg | 1 |
| Maximum Average Forward Rectified Current, Total | Io |  |  | 10 | A | Total | 1 |
| Operating Temperature Range | TJ |  |  | 150 | °C |  | 1 |
| Storage Temperature Range | TSTG | -40 |  | 150 | °C |  | 1 |
| Forward Voltage Drop | VF |  | 1.15 | 1.39 | V | IF=5A, TA=25°C; pulse test 300 μs pulse width, 1 % duty cycle (Note2) | 1 |
| Maximum Reverse Current | IR |  | 0.1 | 1 | uA | VR=400V, TA=25°C | 1 |
| Maximum Reverse Recovery Time | Trr |  |  | 35 | nS | IF,IR=1A, IRR=0.25A | 1 |

## CAD (KiCad official)

- Symbol: `MUR1040DC`
- Footprint: `Package_TO_SOT_SMD:TO-263-2`
- 3D model: TO-263 (KiCad packages3D, STEP)
- 3D model files: `mur1040dc-etched.step` / `mur1040dc-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mur1040dc.step` / `mur1040dc.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/8758001809682247680) (7 pp, sha256 `3fb2c1abe9c79701`, retrieved 2026-10-18, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-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/mur1040dc-datasheet.pdf)