# MS8N120FT

**MASPOWER** · MOSFETs · TO-220

MS8N120FT from MASPOWER, 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; gate-source voltage is ±20 V DC (±30 V transient) with threshold VGS(th) of 3.0 to 5.5 V at ID = 250 µA. |
| 2 | D | passive | Drain, also connected to the tab; drain-source voltage is 1200 V max and continuous drain current is 8 A at TC = 25 °C. |
| 3 | S | passive | Source; source-drain diode continuous current is 8 A typical and pulsed is 22 A typical. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | MASPOWER |
| Package | TO-220 |
| 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 |
|---|---|---|---|---|---|---|---|
| Drain-source breakdown voltage | V(BR)DSS | 1200 |  |  | V | ID = 1 mA, VGS = 0 | 2 |
| Zero gate voltage drain current | IDSS |  |  | 10 | µA | VDS = Max rating | 2 |
| Gate-body leakage current | IGSS | -100 |  | 100 | nA | VGS = ± 20 V | 2 |
| Gate threshold voltage | VGS(th) | 3 |  | 5.5 | V | VDS = VGS, ID = 250 µA | 2 |
| Static drain-source on resistance | RDS(on) |  | 2.6 | 3.4 | Ω | VGS = 10V, ID = 1A | 2 |
| Forward on voltage (source-drain diode) | VSD |  |  | 1.2 | V | ISD= 1A, VGS= 0 | 3 |
| Drain-source voltage (VGS = 0) | VDSS |  |  | 1200 | V | VGS = 0 | 1 |
| Transient gate-source voltage | VGSM | -30 |  | 30 | V |  | 1 |
| Gate-source voltage (DC) | VGSS | -20 |  | 20 | V |  | 1 |
| Drain current (continuous) at TC = 25 °C | ID |  |  | 8 | A | TC = 25 °C | 1 |
| Drain current (continuous) at TC = 100 °C | ID |  |  | 5.5 | A | TC = 100 °C | 1 |
| Drain current (pulsed) | IDM |  |  | 24 | A | pulse width limited by TJ max | 1 |
| Peak diode recovery dv/dt | dv/dt |  |  | 5 | V/ns |  | 1 |
| Total dissipation at TC = 25 °C (TO-220) | PTOT |  |  | 250 | W | TC = 25 °C | 1 |
| Operating junction temperature | TJ | -55 |  | 150 | ℃ |  | 1 |
| Avalanche current, repetitive or not-repetitive | IAR |  |  | 8 | A | pulse width limited by TJ max | 2 |
| Single pulse avalanche energy | EAS |  |  | 83 | mJ | starting TJ = 25 °C, ID = IAR, VDD = 50 V | 2 |
| Thermal resistance junction-case (TO-220) | Rthj-case |  |  | 0.5 | ℃/W | max | 2 |
| Thermal resistance junction-ambient (TO-220) | Rthj-amb |  |  | 62.5 | ℃/W | max | 2 |

## CAD (KiCad official)

- Symbol: `MS8N120FT`
- Footprint: `Package_TO_SOT_THT:TO-220-3_Vertical`
- 3D model: TO-220 (KiCad packages3D, STEP)
- 3D model files: `ms8n120ft-etched.step` / `ms8n120ft-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ms8n120ft.step` / `ms8n120ft.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [MASPOWER datasheet](docs/ms8n120ft-datasheet.pdf) (8 pp, sha256 `56566b6212440ef6`, retrieved 2026-10-29, 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/ms8n120ft-datasheet.pdf)