Part of the Day · 2N7002 — SOT-23 N-channel MOSFET (marking 12)

Part of the Day · 2026-10-23

The SMD small-signal N-channel MOSFET you see most often on PCBs. It is widely used to switch small loads from a logic signal or to shift voltage levels; Nexperia parts are marked 12 plus a one-letter factory code.

Actual size

↓ Actual size, left edge aligned to 0 on the ruler

One ruler tick = 1mm. On PC this is actual size on a 24-inch FHD monitor at 100% zoom; on iPhone it adjusts automatically. For other screens, use “Calibrate ruler” below.

Enlarged (SOT-23 · top view · approx. 20×)

Pins 1 Gate · 2 Source · 3 Drain

Package SOT-23 · Marking 12

Key specifications

Values are from the Nexperia datasheet.

Marking and pins

Marking code 12 · Pins 1 Gate · 2 Source · 3 Drain

Typical uses

• Logic level translation (level shifter)
• Small load switching, high-speed line driver

Companion & similar parts

• BSS138 — Similar SOT-23 N-channel MOSFET (50V, 0.22A) — ratings differ, check before substituting
• 2N7000 — Leaded TO-92 version of the same family — pin order differs, check the datasheet

Marking code 12% follows Nexperia (the % position is the factory code). The 2N7002 is made by many companies, and the marking code and detailed ratings vary by maker, so check that maker's datasheet.