# IRLZ44

**Vishay** · Logic-level power MOSFET (N-channel) · TO-220AB

N-channel logic-level power MOSFET in a TO-220AB package. It is rated 60 V drain-source and 50 A continuous drain current, with RDS(on) of 28 mohm at VGS = 5 V (39 mohm at 4 V), so it fully enhances from a 5 V or even 3.3 V logic output with no gate driver. The metal tab is the drain. The default high-current low-side switch for motors, heaters, and loads driven directly from an MCU pin.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | G | input | Gate. Logic-level MOSFET control input; VGS(th) = 1.0 V min / 2.0 V max, VGS abs max ±10 V. RDS(on) is specified at VGS = 4 V (0.039 Ω) and VGS = 5 V (0.028 Ω). |
| 2 | D | passive | Drain. MOSFET drain terminal; VDS = 60 V max, continuous ID = 50 A at TC = 25 °C (36 A at TC = 100 °C), pulsed IDM = 200 A. Also electrically connected to the TO-220 metal mounting tab. |
| 3 | S | passive | Source. MOSFET source terminal and anode of the intrinsic body diode (VSD ≤ 2.5 V at IS = 51 A). Typically tied to the load-return / ground rail in a low-side switch configuration. |
| TAB | D | passive | Metal mounting tab, internally connected to the Drain (pin 2). Used as the primary thermal path to a heatsink (RthJC = 1.0 °C/W max); must be electrically isolated from ground when the heatsink is grounded. |

## Key specifications

| Parameter | Value |
|---|---|
| Type | N-channel logic-level power MOSFET |
| Drain-source voltage (VDS) | 60 V |
| Continuous drain current (ID) | 50 A @ 25 °C |
| On-resistance (RDS(on)) | 28 mΩ @ VGS=5 V (39 mΩ @ 4 V) |
| Gate drive | Logic-level (fully on at 5 V) |
| Tab | Drain (electrically pin 2) |
| Package | TO-220AB |
| Body (L×W×H) | 10.3 × 4.6 × 15.9 mm (TO-220) |

## Ordering variants

Same part, different packaging or reel option.

- `IRLZ44PBF (TO-220AB)`
- `IRLZ44 (TO-220AB, bulk)`

## CAD (KiCad official)

- Symbol: `Transistor_FET:IRLZ44N`
- Footprint: `Package_TO_SOT_THT:TO-220-3_Vertical`
- 3D model: TO-220-3 (KiCad packages3D)
- 3D model files: `irlz44-etched.step` / `irlz44-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `irlz44.step` / `irlz44.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Vishay datasheet](https://www.vishay.com/docs/91328/irlz44.pdf) (8 pp, sha256 `8dd82ac7164a38ee`, retrieved 2026-08-17, tier: manufacturer)
- **Extractor:** `ds2sf` (Claude) — every pin and dimension is cited to a datasheet page; refuses to fabricate.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/irlz44-datasheet.pdf)