# 1N4004 M4

**FOSAN** · Diodes - General Purpose · SMA(DO-214AC)

1N4004 M4 from FOSAN, in a SMA(DO-214AC). 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 | FOSAN |
| Package | SMA(DO-214AC) |
| 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 |
|---|---|---|---|---|---|---|---|
| Peak Reverse Voltage | VRRM |  |  | 400 | V |  | 1 |
| DC Reverse Voltage | VR |  |  | 400 | V |  | 1 |
| RMS Reverse Voltage | VR(RMS) |  |  | 280 | V |  | 1 |
| Forward Rectified Current | IF |  |  | 1 | A |  | 1 |
| Peak Surge Current | IFSM |  |  | 30 | A |  | 1 |
| Junction Temperature | TJ |  |  | 150 | ℃ |  | 1 |
| Storage Temperature | Tstg | -65 |  | 150 | ℃ |  | 1 |
| Thermal Resistance Junction-Ambient | RθJA |  | 50 |  | ℃/W |  | 1 |
| Forward Voltage | VF |  | 1 | 1.1 | V | IF=1A | 1 |
| Reverse Current (TA=25℃) | IR |  |  | 5 | uA | TA=25℃, VR=VRRM | 1 |
| Diode Capacitance | CD |  | 15 |  | pF | VR=4V, f=1MHz | 1 |

## CAD (KiCad official)

- Symbol: `1N4004 M4`
- Footprint: `Diode_SMD:D_SMA`
- 3D model: SMA(DO-214AC) (KiCad packages3D, STEP)
- 3D model files: `1n4004-m4-etched.step` / `1n4004-m4-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `1n4004-m4.step` / `1n4004-m4.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [FOSAN datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8756600479688069120) (3 pp, sha256 `a94b8c67100dd997`, retrieved 2026-10-19, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **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/1n4004-m4-datasheet.pdf)