# 2SD667

**Changjing** · Bipolar (BJT) · TO-92L

2SD667 from Changjing, in a TO-92L. 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 | EMITTER | passive | Emitter terminal of the NPN transistor (2SD667); the datasheet gives no pin-specific current or voltage limit for this pin. |
| 2 | COLLECTOR | passive | Collector terminal of the NPN transistor (2SD667); the datasheet gives no pin-specific limit, and the collector ratings (VCBO 120 V, VCEO 80 V for 2SD667, IC 1 A continuous) apply to the device as a whole. |
| 3 | BASE | passive | Base terminal of the NPN transistor (2SD667); the datasheet gives no pin-specific limit, and the emitter-base voltage rating of 5 V applies to the device as a whole. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| Package | TO-92L |
| Category | Transistors/Thyristors |
| Pins | 3 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Collector-base breakdown voltage | V(BR)CBO | 120 |  |  | V | IC=10μA,IE=0 | 1 |
| Collector-emitter breakdown voltage (2SD667) | V(BR)CEO | 80 |  |  | V | IC=1mA,IB=0 | 1 |
| Emitter-base breakdown voltage | V(BR)EBO | 5 |  |  | V | IE=10μA,IC=0 | 1 |
| Collector cut-off current | ICBO |  |  | 10 | μA | VCB=100V,IE=0 | 1 |
| Emitter cut-off current | IEBO |  |  | 10 | μA | VEB=4V,IC=0 | 1 |
| DC current gain hFE(1) (2SD667, rank B to D) | hFE(1) | 60 |  | 320 |  | VCE=5V,IC=150mA | 1 |
| DC current gain hFE(2) | hFE(2) | 30 |  |  |  | VCE=5V,IC=500mA | 1 |
| Collector-emitter saturation voltage | VCE(sat) |  |  | 1 | V | IC=500mA,IB=50mA | 1 |
| Base-emitter voltage | VBE |  |  | 1.5 | V | VCE=5V,IC=150mA | 1 |
| Transition frequency | fT | 140 |  |  | MHz | VCE=5V,IC=150mA | 1 |
| Collector output capacitance | Cob |  |  | 12 | pF | VCB=10V,IE=0,f=1MHz | 1 |
| Collector-base voltage | VCBO |  |  | 120 | V |  | 1 |
| Collector-emitter voltage (2SD667) | VCEO |  |  | 80 | V |  | 1 |
| Emitter-base voltage | VEBO |  |  | 5 | V |  | 1 |
| Collector current, continuous | IC |  |  | 1 | A |  | 1 |
| Collector power dissipation | PC |  |  | 900 | mW |  | 1 |
| Junction temperature | TJ |  |  | 150 | ℃ |  | 1 |
| Storage temperature | Tstg | -55 |  | 150 | ℃ |  | 1 |
| Thermal resistance junction to ambient | RθJA |  |  | 139 | ℃/W |  | 1 |

## CAD (KiCad official)

- Symbol: `2SD667`
- Footprint: `Package_TO_SOT_THT:TO-92`
- 3D model: TO-92L (KiCad packages3D, STEP)
- 3D model files: `2sd667-etched.step` / `2sd667-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `2sd667.step` / `2sd667.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Changjing datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588887182727241728) (4 pp, sha256 `b2776d92edc7492d`, retrieved 2026-10-18, 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/2sd667-datasheet.pdf)