# 2SB1184

**Changjing** · Bipolar (BJT) · TO-252-2L

2SB1184 from Changjing, in a TO-252-2L. 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, with emitter-base voltage limited to -5 V (VEBO) and base-emitter saturation voltage specified at -1.2 V maximum for IC=-1.5 A, IB=-0.15 A. |
| 2 | COLLECTOR | passive | Collector terminal rated for -60 V collector-base voltage (VCBO), -50 V collector-emitter voltage (VCEO), and -3 A continuous collector current, with collector power dissipation of 1 W. |
| 3 | EMITTER | passive | Emitter terminal of the PNP transistor; the emitter-base breakdown voltage V(BR)EBO is -5 V minimum at IE=-50 µA. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| Package | TO-252-2L |
| 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 | -60 |  |  | V | IC=-50µA, IE=0 | 2 |
| Collector-emitter breakdown voltage | V(BR)CEO | -50 |  |  | V | IC=-1mA, IB=0 | 2 |
| Emitter-base breakdown voltage | V(BR)EBO | -5 |  |  | V | IE=-50µA, IC=0 | 2 |
| Collector cut-off current | ICBO |  |  | -1 | µA | VCB=-40V, IE=0 | 2 |
| Emitter cut-off current | IEBO |  |  | -1 | µA | VEB=-4V, I C=0 | 2 |
| DC current gain (rank P to R range) | hFE(1) | 82 |  | 390 |  | VCE=-3V, I C=-0.5A | 2 |
| Collector-emitter saturation voltage | VCE(sat) |  |  | -1 | V | IC=-2A, IB=-0.2A | 2 |
| Base-emitter saturation voltage | VBE(sat) |  |  | -1.2 | V | IC=-1.5A, IB=-0.15A | 2 |
| Transition frequency | fT | 70 |  |  | MHz | VCE=-5V, I C=-0.5A, f=30MHz | 2 |
| Collector output capacitance | Cob |  |  | 50 | pF | VCB=-10V, IE=0, f=1MHz | 2 |
| 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 |  |  | -3 | A |  | 1 |
| Collector power dissipation | PC |  |  | 1 | W |  | 1 |
| Operation junction and storage temperature range | TJ,Tstg | -55 |  | 150 | ℃ |  | 1 |

## CAD (KiCad official)

- Symbol: `2SB1184`
- Footprint: `Package_TO_SOT_SMD:TO-252-2`
- 3D model: TO-252-2L (KiCad packages3D, STEP)
- 3D model files: `2sb1184-etched.step` / `2sb1184-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `2sb1184.step` / `2sb1184.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Changjing datasheet](docs/2sb1184-datasheet.pdf) (5 pp, sha256 `1aae399fdb7e0dc5`, 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/2sb1184-datasheet.pdf)