# 45P40

**GOFORD** · MOSFETs · TO-252

45P40 from GOFORD, in a TO-252. 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; controls the P-channel MOSFET, with VGS rated ±20 V and VGS(th) of -1.2 V min to -2.5 V max at ID = -250µA. |
| 2 | D | passive | Drain, the center lead which is also the exposed tab; VDS rated -40 V and continuous ID -45 A at TC = 25ºC. |
| 3 | S | passive | Source; continuous body diode current IS is -45 A at TC = 25ºC. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | GOFORD |
| Package | TO-252 |
| 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 Voltage | VDS |  |  | -40 | V |  | 1 |
| Continuous Drain Current | ID |  |  | -45 | A | TC = 25ºC | 1 |
| Continuous Drain Current | ID |  |  | -28 | A | TC = 100ºC | 1 |
| Pulsed Drain Current | IDM |  |  | -180 | A |  | 1 |
| Gate-Source Voltage | VGS | -20 |  | 20 | V |  | 1 |
| Power Dissipation | PD |  |  | 80 | W |  | 1 |
| Single pulse avalanche energy | EAS |  |  | 132 | mJ |  | 1 |
| Operating Junction and Storage Temperature Range | TJ, Tstg | -55 |  | 150 | ºC |  | 1 |
| Thermal Resistance, Junction-to-Ambient | RthJA |  | 50 |  | ºC/W |  | 1 |
| Thermal Resistance, Junction-to-Case | RthJC |  | 1.56 |  | ºC/W |  | 1 |
| Drain-Source Breakdown Voltage | V(BR)DSS | -40 |  |  | V | VGS = 0V, ID = -250µA | 2 |
| Zero Gate Voltage Drain Current | IDSS |  |  | -1 | μA | VDS = -40V, VGS = 0V | 2 |
| Gate-Source Leakage | IGSS | -100 |  | 100 | nA | VGS = ±20V | 2 |
| Gate-Source Threshold Voltage | VGS(th) | -1.2 | -1.6 | -2.5 | V | VDS = VGS, ID = -250µA | 2 |
| Drain-Source On-Resistance | RDS(on) |  | 11 | 14 | mΩ | VGS = -10V, ID = -20A | 2 |
| Drain-Source On-Resistance | RDS(on) |  | 15 | 20 | mΩ | VGS = -4.5V, ID = -20A | 2 |
| Continuous Body Diode Current | IS |  |  | -45 | A | TC = 25ºC | 2 |
| Body Diode Voltage | VSD |  |  | -1.2 | V | TJ = 25ºC, ISD = -20A, VGS = 0V | 2 |

## CAD (KiCad official)

- Symbol: `45P40`
- Footprint: `Package_TO_SOT_SMD:TO-252-2`
- 3D model: TO-252 (KiCad packages3D, STEP)
- 3D model files: `45p40-etched.step` / `45p40-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `45p40.step` / `45p40.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [GOFORD datasheet](https://www.gofordsemi.com/upload/cn/propdf/45P40.pdf) (6 pp, sha256 `aa05b67b6e959aa5`, retrieved 2026-10-19, 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/45p40-datasheet.pdf)