# BC337-TA

**Changjing** · Bipolar Transistors - BJT · TO-92

BC337-TA from Changjing, in a TO-92. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | COLLECTOR | passive | Collector terminal; maximum rated continuous collector current is 800 mA and VCBO is 50 V for BC337 (30 V for BC338). |
| 2 | BASE | input | Base terminal; VBE(sat) is 1.2 V at IC=500 mA, IB=50 mA and VEBO is rated at 5 V. |
| 3 | EMITTER | passive | Emitter terminal; emitter-base voltage rating VEBO is 5 V and VCEO is 45 V for BC337 (25 V for BC338). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| Package | TO-92 |
| Category | Triode/MOS Tube/Transistor |
| Pins | 3 |

## CAD (KiCad official)

- Symbol: `BC337-TA`
- Footprint: `Package_TO_SOT_THT:TO-92_Inline`
- 3D model: TO-92 (KiCad packages3D, STEP)
- 3D model files: `bc337-ta-etched.step` / `bc337-ta-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bc337-ta.step` / `bc337-ta.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [Changjing datasheet](docs/bc337-ta-datasheet.pdf) (5 pp, sha256 `2f132e30206719ff`, retrieved 2026-10-28, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/bc337-ta-datasheet.pdf)