# 2SC2881U

**CBI** · Bipolar (BJT) · SOT-89

2SC2881U from CBI, in a SOT-89. 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 | B | input | Base; limits are VEBO 5 V, IB 160 mA max, and VBE(on) 1 V max at VCE = 5 V, IC = 500 mA. |
| 2 | C | passive | Collector (also the tab); limits are VCBO 120 V, VCEO 120 V, IC 800 mA, and PC 0.5 W (1 W on ceramic board). |
| 3 | E | passive | Emitter; the datasheet gives a V(BR)EBO of 5 V min at IE = 1 mA. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | CBI |
| Package | SOT-89 |
| 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 |
|---|---|---|---|---|---|---|---|
| DC current gain, Group O | hFE | 80 |  | 160 |  | at VCE = 5 V, IC = 100 mA | 1 |
| DC current gain, Group Y | hFE | 120 |  | 240 |  | at VCE = 5 V, IC = 100 mA | 1 |
| Collector Base Cutoff Current | ICBO |  |  | 100 | nA | at VCB = 120 V | 1 |
| Emitter Base Cutoff Current | IEBO |  |  | 100 | nA | at VEB = 5 V | 1 |
| Collector Emitter Breakdown Voltage | V(BR)CEO | 120 |  |  | V | at IC = 1 mA | 1 |
| Emitter Base Breakdown Voltage | V(BR)EBO | 5 |  |  | V | at IE = 1 mA | 1 |
| Collector Emitter Saturation Voltage | VCE(sat) |  |  | 1 | V | at IC = 500 mA, IB = 50 mA | 1 |
| Base Emitter on Voltage | VBE(on) |  |  | 1 | V | at VCE = 5 V, IC = 500 mA | 1 |
| Collector Output Capacitance | Cob |  |  | 30 | pF | at VCB = 10 V, f = 1 MHz | 1 |
| Collector Base Voltage | VCBO |  |  | 120 | V |  | 1 |
| Collector Emitter Voltage | VCEO |  |  | 120 | V |  | 1 |
| Emitter Base Voltage | VEBO |  |  | 5 | V |  | 1 |
| Collector Current | IC |  |  | 800 | mA |  | 1 |
| Base Current | IB |  |  | 160 | mA |  | 1 |
| Collector Power Dissipation (value 0.5) | PC |  |  | 0.5 | W |  | 1 |
| Collector Power Dissipation (value 1) | PC |  |  | 1 | W | Mounted on ceramic board (250 mm2 X 0.8 mm) | 1 |
| Junction Temperature | Tj |  |  | 150 | °C |  | 1 |
| Storage Temperature Range | Tstg | -55 |  | 150 | °C |  | 1 |

## Materials and finish

As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).

| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| housing | PC |  | Base Current IB 160 mA Collector Power Dissipation PC | 1 |

## CAD (KiCad official)

- Symbol: `2SC2881U`
- Footprint: `Package_TO_SOT_SMD:SOT-89-3`
- 3D model: SOT-89 (KiCad packages3D, STEP)
- 3D model files: `2sc2881u-etched.step` / `2sc2881u-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `2sc2881u.step` / `2sc2881u.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [CBI datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603120028682506240) (3 pp, sha256 `e90c573fe5e0ddc4`, retrieved 2026-10-18, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-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/2sc2881u-datasheet.pdf)