Spark Logic

2N7000 N-channel MOSFET connection guide

2N7000 N-channel MOSFET TO-92 straight leads wiring guide with power, signal assignments, and bench checks.

TO-92 straight leads

3 contacts Current package
TO-92 formed leads 3 contacts

onsemi · Case 135AN · 1.27 mm lead pitch · mechanical outline 98AON13880G.

Bulk order code in NDS7002A/D.

Wire the common return and gate pull-down

Required

Keep both supplies off. Connect source and both supply returns together. Fit a 100 kΩ resistor from G to S to define the off state when the gate jumper is open. Use an ESD-safe work area.

  • Gate
  • Common 0 V
    • S (1)
    • Load supply return
    • Gate supply return
    • R2.2
R2 100 kΩ between Gate and Common 0 VGateR2 100 kΩCommon 0 V

Bench checks

  • Verify the flat-face lead order and that R2 connects to G and S. Set the load supply to 5 V with a 10 mA limit and the gate supply to 10 V with a 1 mA limit.

onsemi NDS7002A/D Rev. 11, pp. 1–3; onsemi 2N7000TA/D Rev. 1, pp. 1–2. The pull-down and limits are bench choices.

Connection scenarios

Identify the intrinsic diode

Disconnect both supplies and remove the MOSFET from any parallel circuit paths. Short G to S to discharge the gate. Select diode-test mode and probe from S to D.

Meter diode-test positive probe connected to source and gate, and common probe connected to drain. The intrinsic diode points from source to drain.COM → D+ → S / G2N7000 · intrinsic diodeDS

Bench checks

  • Expect a forward reading with the red probe on S and the black probe on D. Reverse the probes while keeping G shorted to S and expect an open reading.
  • Consult the meter manual for test polarity and current. The displayed forward voltage depends on the test current and device temperature.

onsemi NDS7002A/D Rev. 11, p. 1, device symbol. Bench meter results depend on its test conditions.

TO-92 straight leads wiring map

Highlighted contacts are used in the required step or selected circuit. Select a contact to inspect it.

TO-92 straight leads
Flat marked face toward you and leads pointing down. Left to right: source, gate, drain.
Selected pin details

1 · S

Source · Ground

Return reference for the gate drive in a low-side circuit. The intrinsic body diode has its anode here.

onsemi NDS7002A/D Rev. 11, p. 1

Electrical limits · Pin in the reference

Models and documents

onsemi TO-92 cases 135AN and 135AR. The 2N7000BU and 2N7000TA order codes use a separate electrical table. The SOT-23 2N7002 and NDS7002A have a different lead map and their own ratings.

2N7000
Bulk order code in NDS7002A/D.
2N7000BU
Bulk bag code in 2N7000TA/D.