IRLZ44N Pinout
IRLZ44N Logic-Level N-Channel MOSFET · Logic-level N-channel power MOSFET (~47A, 55V); turns on fully from 5V logic — popular for Arduino loads.
TO-220 printed face toward you, pins down: left to right is G-D-S (Gate, Drain, Source); the metal tab is the Drain. Unlike the IRF540N this is a logic-level MOSFET that turns on well from 5V gate drive.
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | G · Gate | Input | Gate (control) |
| 2 | D · Drain | Output | Drain (also the metal tab) |
| 3 | S · Source | I/O | Source |
How to read the IRLZ44N pinout
- 01
Find pin 1
One end of the chip has a half-circle notch or a dot; with the notch facing up, the top-left pin is pin 1.
- 02
Count counter-clockwise
Count counter-clockwise from pin 1: go down the left side first, then up the right side from the bottom.
- 03
Check the table below
Look up each pin's function by number in the table below; power/ground are color-coded, and alternate-function signals are in parentheses.
Frequently asked questions
What is the IRLZ44N pin order?
TO-220, printed face toward you and pins down: left to right is G-D-S (Gate, Drain, Source). The tab is the Drain. The pin order is the same as the IRF540N — the difference is the gate threshold, not the pinout.
Why pick the IRLZ44N over the IRF540N?
The IRLZ44N is logic-level: it is specified to be largely on at VGS = 5V, so it can be driven directly from a 5V microcontroller pin (still add a gate resistor). The IRF540N needs ~10V and only partially turns on at 5V.
Pinout data comes from Infineon IRLZ44N datasheet (standard TO-220 numbering). Refer to the actual device datasheet as authoritative for the pinout.