# STP5NK50Z

**STMicroelectronics** · MOSFETs · TO-220

STP5NK50Z from STMicroelectronics, 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 of the Zener-protected N-channel MOSFET; gate-source voltage is limited to ±30 V (absolute maximum, Table 1). |
| 2 | D | passive | Drain of the MOSFET, also connected to the mounting tab; drain-source voltage is 500 V and continuous drain current is 4.4 A at TC = 25 °C (Table 1). |
| 3 | S | passive | Source of the MOSFET; source-drain diode forward current is rated 4.4 A continuous and 17.6 A pulsed (Table 7). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| 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 |
|---|---|---|---|---|---|---|---|
| Drain-source voltage | VDS |  |  | 500 | V |  | 2 |
| Gate-source voltage | VGS | -30 |  | 30 | V |  | 2 |
| Drain current (continuous) at TC = 25 °C | ID |  |  | 4.4 | A | TC = 25 °C | 2 |
| Drain current (continuous) at TC = 100 °C | ID |  |  | 2.7 | A | TC = 100 °C | 2 |
| Drain current (pulsed) | IDM |  |  | 17.6 | A | Pulse width limited by safe operating area | 2 |
| Total dissipation at TC = 25 °C | PTOT |  |  | 70 | W | TC = 25 °C | 2 |
| Gate-source ESD human body model | ESD |  |  | 3 | kV | R = 1.5 kΩ, C = 100 pF | 2 |
| Peak diode recovery voltage slope | dv/dt |  |  | 4.5 | V/ns | ISD ≤ 4.4 A, di/dt ≤ 200 A/μs, VDD ≤ V(BR)DSS | 2 |
| Operating junction temperature range | Tj | -55 |  | 150 | °C |  | 2 |
| Avalanche current, repetitive or not-repetitive | IAR |  |  | 4.4 | A | Pulse width limited by Tj max | 2 |
| Single pulse avalanche energy | EAS |  |  | 130 | mJ | Starting Tj = 25 °C, ID = IAR, VDD = 50 V | 2 |
| Drain-source breakdown voltage | V(BR)DSS | 500 |  |  | V | ID = 1 mA, VGS = 0 V | 3 |
| Zero gate voltage drain current | IDSS |  |  | 1 | µA | VGS = 0 V, VDS = 500 V | 3 |
| Zero gate voltage drain current (TC = 125 °C) | IDSS |  |  | 50 | µA | VGS = 0 V, VDS = 500 V, TC = 125 °C (defined by design, not production tested) | 3 |
| Gate body leakage current | IGSS | -10 |  | 10 | µA | VDS = 0 V, VGS = ±20 V | 3 |
| Gate threshold voltage | VGS(th) | 3 | 3.75 | 4.5 | V | VDS = VGS, ID = 50 µA | 3 |
| Static drain-source on resistance | RDS(on) |  | 1.22 | 1.5 | Ω | VGS = 10 V, ID = 2.2 A | 3 |
| Total gate charge | Qg |  | 20 | 28 | nC | VDD = 400 V, ID = 4.4 A, VGS = 0 to 10 V | 3 |
| Gate-source breakdown voltage | V(BR)GSO | 30 |  |  | V | IGS = ±1 mA, ID = 0 A | 4 |
| Junction-case thermal resistance | Rthj-case |  | 1.78 |  | °C/W | TO-220 column of Table 2 (single printed value) | 2 |
| Junction-ambient thermal resistance | Rthj-amb |  | 62.5 |  | °C/W | TO-220 column of Table 2 (no test conditions printed) | 2 |

## CAD (KiCad official)

- Symbol: `STP5NK50Z`
- Footprint: `Package_TO_SOT_THT:TO-220-3_Vertical`
- 3D model: TO-220 (KiCad packages3D, STEP)
- 3D model files: `stp5nk50z-etched.step` / `stp5nk50z-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `stp5nk50z.step` / `stp5nk50z.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [STMicroelectronics datasheet](https://www.st.com/resource/en/datasheet/stp5nk50z.pdf) (29 pp, sha256 `646ad0478bceba64`, retrieved 2026-10-11, tier: manufacturer)
- **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/stp5nk50z-datasheet.pdf)