MMBT2222A NPN Transistor

@@ -0,0 +1,46 @@+# MMBT2222A++**Diodes Incorporated** · Bipolar Transistor (BJT) · SOT-23++The MMBT2222A is the SOT-23 surface-mount version of the 2N2222A general-purpose NPN transistor. It handles up to 40 V and 600 mA continuous collector current, making it a common choice for low-power switching, relay and LED driving, and small-signal amplification.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | B | input | Base terminal of the NPN BJT. Drives collector current via hFE (typ 100-300 at IC=150mA, VCE=10V); VBE(sat) ~ 1.2V max at IC=150mA/IB=15mA. Absolute max VEBO = 6.0V, IBM = 200mA. |+| 2 | E | passive | Emitter terminal of the NPN BJT. Common return for collector and base currents. Absolute max VEBO = 6.0V. In a typical NPN switching/amplifier configuration this pin is tied to (or referenced from) the low-side supply. |+| 3 | C | passive | Collector terminal of the NPN BJT. Absolute max VCBO = 75V, VCEO = 40V; IC = 600mA continuous, ICM = 800mA peak. VCE(sat) < 0.3V at IC = 150mA, IB = 15mA. |++## Key specifications++| Parameter | Value |+|---|---|+| Type | NPN bipolar transistor |+| Collector-emitter voltage (VCEO) | 40 V |+| Collector current (IC) | 600 mA continuous |+| hFE | 100 to 300 at IC = 150 mA |+| Transition frequency (fT) | 300 MHz min |+| Power dissipation | 350 mW |+| Operating temperature | -55 C to 150 C |++## Ordering variants++- `MMBT2222A-7-F`+- `MMBT2222A-13-F`++## CAD (KiCad official)++- Symbol: `mmbt2222a.kicad_sym`+- Footprint: `mmbt2222a.kicad_mod`+- 3D model: SOT-23 body from KiCad `Package_TO_SOT_SMD/SOT-23`.++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Diodes Incorporated datasheet](https://www.diodes.com/assets/Datasheets/MMBT2222A.pdf) (7 pp, sha256 `02047f112848a0d2`, retrieved 2026-08-17, tier: manufacturer)+- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/mmbt2222a-datasheet.pdf)

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