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)

Provenance

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

Datasheet: Vishay datasheet (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