# IRF4905

**UMW** · MOSFETs · TO-220

IRF4905 from UMW, in a TO-220. 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; the datasheet rates the gate-to-source voltage VGS at ±20 V. |
| 2 | D | passive | DRAIN terminal; rated VDS = -55 V with continuous drain current ID = -74 A at TC = 25°C. |
| 3 | S | passive | SOURCE terminal; continuous body-diode source current IS = -74 A. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | UMW |
| Package | TO-220 |
| 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 |
|---|---|---|---|---|---|---|---|
| Continuous Drain Current | ID |  |  | -74 | A | VGS=-10V, TC=25°C | 1 |
| Continuous Drain Current | ID |  |  | -52 | A | VGS=-10V, TC=100°C | 1 |
| Pulsed Drain Current | IDM |  |  | -260 | A |  | 1 |
| Power Dissipation | PD |  |  | 200 | W | TC=25°C | 1 |
| Linear Derating Factor |  |  |  | 1.3 | W/°C |  | 1 |
| Gate-to-Source Voltage | VGS | -20 |  | 20 | V |  | 1 |
| Single Pulse Avalanche Energy | EAS |  |  | 930 | mJ |  | 1 |
| Avalanche Current | IAR |  |  | -38 | A |  | 1 |
| Repetitive Avalanche Energy | EAR |  |  | 20 | mJ |  | 1 |
| Peak Diode Recovery dv/dt | dv/dt |  |  | -5 | V/ns |  | 1 |
| Operating Junction and Storage Temperature Range | TJ, TSTG | -55 |  | 175 | °C |  | 1 |
| Soldering Temperature |  |  |  | 300 | °C | for 10 seconds, 1.6mm from case | 1 |
| Mounting Torque, 6-32 or M3 screw |  |  |  | 10 | lbf•in | 6-32 or M3 screw | 1 |
| Junction-to-Case | RθJC |  |  | 0.75 | °C/W |  | 2 |
| Junction-to-Ambient | RθJA |  |  | 62 | °C/W |  | 2 |
| Case-to-Sink, Flat, Greased Surface | RθCS |  | 0.5 |  | °C/W |  | 2 |
| Drain-to-Source Breakdown Voltage | V(BR)DSS | -55 |  |  | V | ID=-250µA, VGS=0V | 3 |
| Static Drain-to-Source On-Resistance | RDS(ON) |  | 18 | 20 | mΩ | VGS=-10V, ID=-38A | 3 |
| Gate Threshold Voltage | VGS(th) | -2 |  | -4 | V | VDS=VGS, ID=-250µA | 3 |
| Forward Transconductance | gFS | 21 |  |  | S | VDS=-25V, ID=-38A | 3 |
| Drain-to-Source Leakage Current | IDSS |  |  | -25 | µA | VDS=-55V, VGS=0V | 3 |
| Drain-to-Source Leakage Current | IDSS |  |  | -250 | µA | VDS=-44V, VGS=0V, TJ=150°C | 3 |
| Gate-to-Source Forward Leakage | IGSS |  |  | 100 | nA | VGS=20V | 3 |
| Gate-to-Source Reverse Leakage | IGSS |  |  | -100 | nA | VGS=-20V | 3 |
| Total Gate Charge | Qg |  |  | 180 | nC | ID=-38A, VDS=-44V, VGS=-10V | 3 |
| Continuous Source Current (Body Diode) | IS |  |  | -74 | A |  | 4 |
| Pulsed Source Current (Body Diode) | ISM |  |  | -260 | A |  | 4 |
| Diode Forward Voltage | VSD |  |  | -1.6 | V | TJ=25°C, IS=-38A, VGS=0V | 4 |
| Reverse Recovery Time | trr |  |  | 130 | ns | TJ=25°C, IF=-38A, dI/dt=-100A/µs | 4 |
| Reverse Recovery Charge | Qrr |  |  | 350 | nC | TJ=25°C, IF=-38A, dI/dt=-100A/µs | 4 |

## CAD (KiCad official)

- Symbol: `IRF4905`
- Footprint: `Package_TO_SOT_THT:TO-220-3_Vertical`
- 3D model: TO-220 (KiCad packages3D, STEP)
- 3D model files: `irf4905-etched.step` / `irf4905-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `irf4905.step` / `irf4905.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/8763509916491628544) (12 pp, sha256 `496c55415f0fe16c`, retrieved 2026-10-09, 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/irf4905-datasheet.pdf)