# MSD40P45

**Bruckewell** · MOSFETs · TO-252

MSD40P45 from Bruckewell, 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; gate-source voltage limited to ±20 V, with threshold of -1.0 to -2.5 V and suited to -4.5 V gate drive. |
| 2 | D | passive | Drain (also the exposed tab); drain-source voltage -40 V and continuous drain current -45 A at TC=25°C. |
| 3 | S | passive | Source; continuous source current -45 A and pulsed source current -90 A through the body diode. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Bruckewell |
| Package | TO-252 |
| Category | Triode/MOS Tube/Transistor |
| 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 |
|---|---|---|---|---|---|---|---|
| Gate Threshold Voltage | VGS(th) | -1 | -1.6 | -2.5 | V | VDS=VGS, ID=-250μA | 2 |
| Drain-Source Breakdown Voltage | BVDSS | -40 |  |  | V | VGS=0V, ID=-250μA | 2 |
| Gate-Source Leakage Current | IGSS | -100 |  | 100 | nA | VDS=0V, VGS=±20V | 2 |
| Drain-Source Leakage Current | IDSS |  |  | -1 | μA | VDS=-40V, VGS=0V, TJ=25°C | 2 |
| Drain-Source Leakage Current | IDSS |  |  | -10 | μA | VDS=-32V, VGS=0V, TJ=125°C | 2 |
| Static Drain-Source On-Resistance | RDS(on) |  | 12 | 15 | mΩ | VGS=-10V, ID=-20A | 2 |
| Static Drain-Source On-Resistance | RDS(on) |  | 16 | 22 | mΩ | VGS=-4.5V, ID=-10A | 2 |
| Single Pulse Avalanche Energy | EAS | 31.2 |  |  | mJ | VDD=-25V, L=0.1mH, IAS=-25A | 2 |
| Diode Forward Voltage | VSD |  |  | -1.2 | V | IS=-20A, VGS=0V, TJ=25°C | 2 |
| Continuous Source Current | IS |  |  | -45 | A | VG=VD=0V, Force Current | 2 |
| Pulsed Source Current | ISM |  |  | -90 | A | VG=VD=0V, Force Current | 2 |
| Drain-Source Voltage | VDS |  |  | -40 | V |  | 2 |
| Gate-Source Voltage | VGS | -20 |  | 20 | V |  | 2 |
| Continuous Drain Current | ID |  |  | -45 | A | TC=25°C | 2 |
| Continuous Drain Current | ID |  |  | -28 | A | TC=100°C | 2 |
| Pulsed Drain Current | IDM |  |  | -180 | A |  | 2 |
| Single Pulse Avalanche Current | IAS |  |  | -51 | A | L=0.1mH | 2 |
| Single Pulse Avalanche Energy | EAS |  |  | 130 | mJ | L=0.1mH | 2 |
| Power Dissipation | PD |  |  | 73.5 | W | TC=25°C | 2 |
| Power Dissipation | PD |  |  | 2 | W | TA=25°C | 2 |
| Operating Junction and Storage Temperature | TJ/TSTG | -55 |  | 150 | °C |  | 2 |
| Maximum Junction-to-Ambient | RθJA |  |  | 62.5 | °C/W |  | 2 |
| Maximum Junction-to-Case | RθJC |  |  | 1.7 | °C/W |  | 2 |
| Forward Transconductance | gfs |  | 13 |  | S | VDS=-10V, ID=-10A | 2 |
| Total Gate Charge | Qg |  | 22.2 |  | nC | VDS=-32V, ID=-10A, VGS=-4.5V | 3 |
| Gate-Source Charge | Qgs |  | 8.2 |  | nC | VDS=-32V, ID=-10A, VGS=-4.5V | 3 |
| Gate-Drain Charge | Qgd |  | 8.8 |  | nC | VDS=-32V, ID=-10A, VGS=-4.5V | 3 |
| Turn-On Delay Time | td(on) |  | 23 |  | ns | VDS=-20V, ID=-1A, VGS=-10V, RG=6Ω | 3 |
| Rise Time | tr |  | 10 |  | ns | VDS=-20V, ID=-1A, VGS=-10V, RG=6Ω | 3 |
| Turn-Off Delay Time | td(off) |  | 135 |  | ns | VDS=-20V, ID=-1A, VGS=-10V, RG=6Ω | 3 |
| Fall Time | tf |  | 46 |  | ns | VDS=-20V, ID=-1A, VGS=-10V, RG=6Ω | 3 |
| Input Capacitance | CISS |  | 2757 |  | pF | VDS=-25V, VGS=0V, f=1.0MHz | 3 |
| Output Capacitance | COSS |  | 240 |  | pF | VDS=-25V, VGS=0V, f=1.0MHz | 3 |
| Reverse Transfer Capacitance | CRSS |  | 137 |  | pF | VDS=-25V, VGS=0V, f=1.0MHz | 3 |

## CAD (KiCad official)

- Symbol: `MSD40P45`
- Footprint: `Package_TO_SOT_SMD:TO-252-2`
- 3D model: TO-252 (KiCad packages3D, STEP)
- 3D model files: `msd40p45-etched.step` / `msd40p45-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `msd40p45.step` / `msd40p45.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Bruckewell datasheet](docs/msd40p45-datasheet.pdf) (6 pp, sha256 `a30b4f078706d747`, retrieved 2026-10-23, 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/msd40p45-datasheet.pdf)