2N7000 Pinout
2N7000 N-Channel MOSFET · Small-signal N-channel enhancement MOSFET; common logic-level switch for small loads.
TO-92 flat (printed) face toward you, pins pointing down: left to right is S-G-D (Source, Gate, Drain). Note this is NOT the same order as the BS170, which is D-G-S — check the datasheet before swapping.
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | S · Source | I/O | Source |
| 2 | G · Gate | Input | Gate (control) |
| 3 | D · Drain | Output | Drain |
How to read the 2N7000 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 2N7000 pin order?
In the TO-92 package, flat face toward you and pins down, left to right is S-G-D (Source, Gate, Drain). The BS170 looks identical but is wired D-G-S, so do not assume they are interchangeable — confirm against the datasheet.
Can the 2N7000 switch directly from a microcontroller pin?
Yes for small loads — it is roughly logic-level (it turns on usefully around a few volts of gate drive), but it is rated only ~200 mA continuous and ~60V. For larger loads use a power MOSFET such as the IRLZ44N.
Pinout data comes from onsemi 2N7000 datasheet (standard TO-92 numbering). Refer to the actual device datasheet as authoritative for the pinout.