MOSFET 1
Test the gate, drain and source for this channel together.
2N7002 N-channel MOSFET family pinout
K72 appears on single 2N7002 and dual 2N7002DW MOSFETs. Check the package before choosing a pin map.
SOT-23 · single 3 contacts
SOT-323 · single 3 contacts
SOT-523 · single 3 contacts
SOT-363 · dual
6 contacts Current packageSOT-363 · dual pinout
1 · S1
Source. Connect to ground for a low-side test and use as the gate voltage reference.
Check low-side switching on channel 1
- 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
- →
All 6 pins
| Pin | Signal | Direction | Function |
|---|---|---|---|
| 1 | S1 Terminal | Terminal | Source. Connect to ground for a low-side test and use as the gate voltage reference. |
| 2 | G1 Input | Input | Gate. Drive relative to its own source. A gate threshold measurement does not establish low on-resistance. |
| 3 | D2 Terminal | Terminal | Drain. Connect to the load in the low-side test. The intrinsic body diode conducts from source toward drain. |
| 4 | S2 Terminal | Terminal | Source. Connect to ground for a low-side test and use as the gate voltage reference. |
| 5 | G2 Input | Input | Gate. Drive relative to its own source. A gate threshold measurement does not establish low on-resistance. |
| 6 | D1 Terminal | Terminal | Drain. Connect to the load in the low-side test. The intrinsic body diode conducts from source toward drain. |
Signal assignments
Electrical limits
| Parameter | Limit | Conditions and source |
|---|---|---|
| On-resistance7 Ω max | 7 Ω max | VGS = 5 V, ID = 50 mA in the datasheet pulse test. JSCJ 2N7002DW Rev. 1.1, p. 2 |
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.
- Datasheet for PANJIT 2N7002K· Rev. 00S; SOT-23 pinout, K72 marking and limits.
- Datasheet for PANJIT 2N7002KW· Rev. 02S; SOT-323 pinout, K72 marking and limits.
- Datasheet for Diodes 2N7002· DS11303 Rev. 40-2; SOT-23 pinout and K72 marking.
- Datasheet for JSCJ 2N7002DW· Rev. 1.1; SOT-363 pinout and K72 marking.
- Datasheet for MCC 2N7002T· Rev. 3-1; SOT-523 pinout, K72 marking and ratings.
- MCC 2N7002T marking change notice· ECN 062121-1 confirms K72 for the SOT-523 candidate; the notice is not a pinout.
- Source register· Original document URLs, revisions and file checksums.