# 2SB766A

**Changjiang Electronics Tech (CJ)** · Bipolar Transistors - BJT · SOT-89-3L

2SB766A from Changjiang Electronics Tech (CJ), in a SOT-89-3L. 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 | BASE | passive | Base terminal of the PNP transistor; the datasheet specifies VBE(sat) of -0.85 V (min) to -1.2 V (max) at IC=-500mA, IB=-50mA, and VEBO of -5 V. |
| 2 | COLLECTOR | passive | Collector terminal; the datasheet limits are VCBO -60 V, VCEO -50 V, continuous IC -1 A, and collector power dissipation PC 500 mW. |
| 3 | EMITTER | passive | Emitter terminal; the datasheet limits the emitter-base voltage to VEBO -5 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Changjiang Electronics Tech (CJ) |
| Package | SOT-89-3L |
| Category | Transistors |
| 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 | -60 |  |  | V | Ic=-10μA,IE=0 | 1 |
| Collector-emitter breakdown voltage | V(BR)CEO | -50 |  |  | V | Ic=-2mA,IB=0 | 1 |
| Emitter-base breakdown voltage | V(BR)EBO | -5 |  |  | V | IE=-10μA,IC=0 | 1 |
| Collector cut-off current | ICBO |  |  | -0.1 | μA | VCB=-20V,IE=0 | 1 |
| Emitter cut-off current | IEBO |  |  | -0.1 | μA | VEB=-4V,IC=0 | 1 |
| DC current gain hFE(1) | hFE(1) | 85 |  | 340 |  | VCE=-10V,IC=-500mA | 1 |
| DC current gain hFE(2) | hFE(2) | 50 |  |  |  | VCE=-5V,IC=-1A | 1 |
| Collector-emitter saturation voltage | VCE(sat) |  | -0.2 | -0.4 | V | IC=-500mA,IB=-50mA | 1 |
| Base-emitter saturation voltage | VBE(sat) |  | -0.85 | -1.2 | V | IC=-500mA,IB=-50mA | 1 |
| Transition frequency | fT | 200 |  |  | MHz | VCE=-10V,IC=-50mA,f=200MHz | 1 |
| Collector output capacitance | Cob |  | 20 | 30 | pF | VCB=-10V,IE=0,f=1MHz | 1 |
| Collector-base voltage | VCBO |  |  | -60 | V |  | 1 |
| Collector-emitter voltage | VCEO |  |  | -50 | V |  | 1 |
| Emitter-base voltage | VEBO |  |  | -5 | V |  | 1 |
| Collector current, continuous | IC |  |  | -1 | A |  | 1 |
| Collector power dissipation | PC |  |  | 500 | mW |  | 1 |
| Junction temperature | TJ |  |  | 150 | ℃ |  | 1 |
| Storage temperature | Tstg | -55 |  | 150 |  |  | 1 |

## CAD (KiCad official)

- Symbol: `2SB766A`
- Footprint: `Package_TO_SOT_SMD:SOT-89-3`
- 3D model: SOT-89-3L (KiCad packages3D, STEP)
- 3D model files: `2sb766a-etched.step` / `2sb766a-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `2sb766a.step` / `2sb766a.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Changjiang Electronics Tech (CJ) datasheet](docs/2sb766a-datasheet.pdf) (1 pp, sha256 `12906a00d66e6d44`, retrieved 2026-10-29, 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/2sb766a-datasheet.pdf)