Spark Logic

2N7002 N-channel MOSFET family connection guide

2N7002 N-channel MOSFET family (SOT-363 · dual) connection guide. Check low-side switching on channel 1. Check low-side switching on channel 2.

SOT-23 · single 3 contacts
SOT-323 · single 3 contacts
SOT-523 · single 3 contacts

SOT-363 · dual

6 contacts Current package

Diodes Incorporated / PANJIT / MCC / Jiangsu Changjing · Jiangsu Changjing 2N7002DW.

Check low-side switching on channel 1

Required

Use a 1 kΩ load and a 5 V current-limited supply. With a common ground, drive the gate first to 0 V and then to 10 V. Hold the other channel off by grounding its gate and source; leave its drain open.

Check low-side switching on channel 15 V1 kΩMeasure D10 / 10 VGate 1GND
  • Load supply
    • Current-limited 5 V supply
    • RL.1
  • Drain
    • RL.2
    • Meter positive
  • Gate drive
    • →
    • Switchable 0 V / 10 V drive
  • Return
    • Meter common
    • Gate supply return
    • Load supply return
    • →

Bench checks

  • At 0 V gate drive, the drain should be near 5 V. At 10 V the drain should fall close to ground.
  • This is a function check at roughly 5 mA. Check the exact device limits before choosing a logic-level gate drive or a higher load.

JSCJ 2N7002DW Rev. 1.1, equivalent circuit and electrical characteristics. Supply and load values are fixture choices.

Connection scenarios

Check low-side switching on channel 2

Use a 1 kΩ load and a 5 V current-limited supply. With a common ground, drive the gate first to 0 V and then to 10 V. Hold the other channel off by grounding its gate and source; leave its drain open.

Check low-side switching on channel 25 V1 kΩMeasure D20 / 10 VGate 2GND
  • Load supply
    • Current-limited 5 V supply
    • RL.1
  • Drain
    • RL.2
    • Meter positive
  • Gate drive
    • →
    • Switchable 0 V / 10 V drive
  • Return
    • Meter common
    • Gate supply return
    • Load supply return
    • →

Bench checks

  • At 0 V gate drive, the drain should be near 5 V. At 10 V the drain should fall close to ground.
  • This is a function check at roughly 5 mA. Check the exact device limits before choosing a logic-level gate drive or a higher load.

JSCJ 2N7002DW Rev. 1.1, equivalent circuit and electrical characteristics. Supply and load values are fixture choices.

SOT-363 · dual wiring map

External wiring example · Check low-side switching on channel 2

Highlighted contacts are used in the required step or selected circuit. Select a contact to highlight its wiring nets.

SOT-363 · dual · Top view, pin 1 by the index. The rows follow 1–3 and 6–4.
Selected pin details

1 · S1

Terminal · Bidirectional

Source. Connect to ground for a low-side test and use as the gate voltage reference.

JSCJ 2N7002DW Rev. 1.1, p. 1

Electrical limits · Pin in the reference

Models and documents

The reported K72 K 4 has three leads (1+2). That fits the documented single MOSFETs in SOT-23, SOT-323 or SOT-523 and rules out the six-lead 2N7002DW for this specimen. Measure the moulded body, excluding leads: roughly 2.9 mm for SOT-23, 2.0 mm for SOT-323 and 1.6 mm for SOT-523. Diodes documents K72 plus a separate two-character date code; the format alone does not identify the manufacturer.

2N7002DW
Two independent N-channel MOSFETs.