# FDN304P

**UMW** · MOSFETs · SOT-23

FDN304P from UMW, in a SOT-23. 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 | G | input | GATE terminal of the P-channel MOSFET; gate-source voltage VGS is rated ±8V. |
| 2 | S | passive | SOURCE terminal of the P-channel MOSFET; the body diode continuous source-drain current IS is rated -1.2A and pulsed ISM is rated -10A. |
| 3 | D | passive | DRAIN terminal of the P-channel MOSFET; drain-source voltage VDS is rated -20V and continuous drain current ID is rated -2.4A. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | UMW |
| Package | SOT-23 |
| Category | Transistors/Thyristors |
| 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 |
|---|---|---|---|---|---|---|---|
| Drain-Source On-Resistance (VGS=-4.5V) | RDS(ON) |  | 36 | 52 | mΩ | VGS=-4.5V, ID=-2.4A | 2 |
| Drain-Source On-Resistance (VGS=-2.5V) | RDS(ON) |  | 47 | 70 | mΩ | VGS=-2.5V, ID=-2A | 2 |
| Drain-Source On-Resistance (VGS=-1.8V) | RDS(ON) |  | 65 | 100 | mΩ | VGS=-1.8V, ID=-1.8A | 2 |
| Drain-Source Breakdown Voltage | V(BR)DSS | -20 |  |  | V | VGS=0V, ID=-250µA | 2 |
| Gate-Source Threshold Voltage | VGS(th) | -0.4 | -0.8 | -1.5 | V | VDS=VGS, ID=-250µA | 2 |
| Gate-Source Leakage | IGSS | -100 |  | 100 | nA | VGS=±8V, VDS=0V | 2 |
| Zero Gate Voltage Drain Current | IDSS |  |  | -1 | µA | VDS=-16V, VGS=0V | 2 |
| Diode Forward Voltage | VSD |  |  | -1.2 | V | IS=-1A, VGS=0V | 2 |
| Gate Resistance | Rg |  | 0.5 | 3.2 | Ω | f=1MHz | 2 |
| Continuous Source-Drain Diode Current | IS |  |  | -1.2 | A | TC=25°C | 2 |
| Pulsed Diode Forward Current | ISM |  |  | -10 | A |  | 2 |
| Drain-Source Voltage | VDS |  |  | -20 | V |  | 1 |
| Gate-Source Voltage | VGS | -8 |  | 8 | V |  | 1 |
| Continuous Drain Current | ID |  |  | -2.4 | A |  | 1 |
| Pulsed Drain Current | IDM |  |  | -10 | A |  | 1 |
| Power Dissipation | PD |  |  | 1.1 | W |  | 1 |
| Junction Temperature | TJ |  |  | 150 | °C |  | 1 |
| Storage Temperature | TSTG | -55 |  | 150 | °C |  | 1 |
| Thermal Resistance, Junction to Ambient | RθJA |  |  | 250 | °C/W | t≤10s | 1 |

## CAD (KiCad official)

- Symbol: `FDN304P`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `fdn304p-etched.step` / `fdn304p-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `fdn304p.step` / `fdn304p.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [UMW datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8755876973040013312) (8 pp, sha256 `039d4722c05c1723`, retrieved 2026-10-16, 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/fdn304p-datasheet.pdf)