# 2SD667A-TA

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

2SD667A-TA 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; the datasheet's absolute maximum emitter-base voltage (VEBO) is 5 V. |
| 2 | COLLECTOR | passive | Collector terminal; the datasheet gives VCBO 120 V, VCEO 100 V for 2SD667A (80 V for 2SD667), continuous collector current 1 A and collector power dissipation 900 mW. |
| 3 | BASE | passive | Base terminal of the NPN transistor; the datasheet gives typical base-emitter voltage VBE of 1.5 V at VCE=5 V, IC=150 mA. |

## 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 | 2 |
| Collector-emitter breakdown voltage (2SD667A) | V(BR)CEO | 100 |  |  | V | IC=1mA,IB=0 | 2 |
| Emitter-base breakdown voltage | V(BR)EBO | 5 |  |  | V | IE=10μA,IC=0 | 2 |
| Collector cut-off current | ICBO |  |  | 10 | μA | VCB=100V,IE=0 | 2 |
| Emitter cut-off current | IEBO |  |  | 10 | μA | VEB=4V,IC=0 | 2 |
| DC current gain (2SD667A) | hFE(1) | 60 |  | 320 |  | VCE=5V,IC=150mA | 2 |
| DC current gain (2SD667A) | hFE(2) | 30 |  |  |  | VCE=5V,IC=500mA | 2 |
| Collector-emitter saturation voltage | VCE(sat) |  |  | 1 | V | IC=500mA,IB=50mA | 2 |
| Base-emitter voltage | VBE |  |  | 1.5 | V | VCE=5V,IC=150mA | 2 |
| Collector-emitter voltage (2SD667A) | VCEO |  |  | 100 | V |  | 1 |
| Collector-base voltage | VCBO |  |  | 120 | V |  | 1 |
| Emitter-base voltage | VEBO |  |  | 5 | V |  | 1 |
| Collector current (continuous) | IC |  |  | 1 | A |  | 1 |
| Collector power dissipation | PC |  |  | 900 | mW |  | 1 |
| Operation junction and storage temperature range | TJ,Tstg | -55 |  | 150 | ℃ |  | 1 |
| Thermal resistance, junction to ambient | RθJA |  |  | 139 | ℃/W |  | 1 |

## CAD (KiCad official)

- Symbol: `2SD667A-TA`
- Footprint: `Package_TO_SOT_THT:TO-92`
- 3D model: TO-92L (KiCad packages3D, STEP)
- 3D model files: `2sd667a-ta-etched.step` / `2sd667a-ta-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `2sd667a-ta.step` / `2sd667a-ta.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/8590229261953884160) (5 pp, sha256 `2d05eba67f96cda2`, 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/2sd667a-ta-datasheet.pdf)