# 2SB1424

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

2SB1424 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 | input | Base terminal of the PNP transistor; the datasheet specifies VCE(sat) at IC=-2A with IB=-0.1A and hFE at VCE=-2V, IC=-0.1A. |
| 2 | COLLECTOR | passive | Collector terminal of the PNP transistor; rated for VCBO -20V, VCEO -20V, and IC -3A continuous collector current, with PC 500mW at Ta=25℃. |
| 3 | EMITTER | passive | Emitter terminal of the PNP transistor; rated for VEBO -6V, with emitter cut-off current IEBO specified at VEB=-5V. |

## 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 | -20 |  |  | V | IC=-50µA,IE=0 | 1 |
| Collector-emitter breakdown voltage | V(BR)CEO | -20 |  |  | V | IC=-1mA,IB=0 | 1 |
| Emitter-base breakdown voltage | V(BR)EBO | -6 |  |  | V | IE=-50µA,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=-5V,IC=0 | 1 |
| DC current gain | hFE | 120 |  | 390 |  | VCE=-2V, IC=-0.1A | 1 |
| Collector-emitter saturation voltage | VCE(sat) |  |  | -0.5 | V | IC=-2A,IB=-0.1A | 1 |
| Collector output capacitance | Cob |  | 35 |  | pF | VCB=-10V,IE=0, f=1MHz | 1 |
| Transition frequency | fT |  | 240 |  | MHz | VCE=-2V,IC=-0.5A, f=100MHz | 1 |
| Collector-base voltage | VCBO |  |  | -20 | V |  | 1 |
| Collector-emitter voltage | VCEO |  |  | -20 | V |  | 1 |
| Emitter-base voltage | VEBO |  |  | -6 | V |  | 1 |
| Collector current | IC |  |  | -3 | A |  | 1 |
| Collector power dissipation | PC |  |  | 500 | mW |  | 1 |
| Junction temperature | Tj |  |  | 150 | ℃ |  | 1 |
| Storage temperature | Tstg | -55 |  | 150 | ℃ |  | 1 |
| Thermal resistance from junction to ambient | RθJA |  |  | 250 | ℃/W |  | 1 |

## CAD (KiCad official)

- Symbol: `2SB1424`
- Footprint: `Package_TO_SOT_SMD:SOT-89-3`
- 3D model: SOT-89-3L (KiCad packages3D, STEP)
- 3D model files: `2sb1424-etched.step` / `2sb1424-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `2sb1424.step` / `2sb1424.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Changjiang Electronics Tech (CJ) datasheet](docs/2sb1424-datasheet.pdf) (2 pp, sha256 `f7027a0e249a979f`, retrieved 2026-10-30, 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/2sb1424-datasheet.pdf)