# 2SD669U

**CBI** · Bipolar (BJT) · SOT-89

2SD669U 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 of the NPN transistor; emitter-base voltage is limited to 5 V and the collector-base breakdown is 180 V minimum. |
| 2 | C | passive | Collector of the NPN transistor; VCEO is 160 V, VCBO is 180 V, and continuous collector current is 1.5 A. |
| 3 | E | passive | Emitter of the NPN transistor, the common terminal for the 1.5 A continuous collector current. |

## 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 |
|---|---|---|---|---|---|---|---|
| Collector-Base Voltage | VCBO |  |  | 180 | V |  | 1 |
| Collector-Emitter Voltage | VCEO |  |  | 160 | V |  | 1 |
| Emitter-Base Voltage | VEBO |  |  | 5 | V |  | 1 |
| Collector Current -Continuous | IC |  |  | 1.5 | A |  | 1 |
| Collector Dissipation | PC |  |  | 0.75 | W |  | 1 |
| Junction Temperature | TJ |  |  | 150 | ℃ |  | 1 |
| Storage Temperature | Tstg | -55 |  | 150 | ℃ |  | 1 |
| Thermal Resistance from Junction to Ambient | RθJA |  |  | 167 | ℃/W |  | 1 |
| Collector-base breakdown voltage | V(BR)CBO | 180 |  |  | V | IC=1mA, IE=0 | 2 |
| Collector-emitter breakdown voltage | V(BR)CEO | 160 |  |  | V | IC=10mA, IB=0 | 2 |
| Emitter-base breakdown voltage | V(BR)EBO | 5 |  |  | V | IE=1mA, IC=0 | 2 |
| Collector cut-off current | ICBO |  |  | 10 | µA | VCB=160V, IE=0 | 2 |
| DC current gain hFE(1) | hFE(1) | 60 |  | 320 |  | VCE=5V, IC=150mA | 2 |
| DC current gain hFE(2) | hFE(2) | 30 |  |  |  | VCE=5V, IC=500mA | 2 |
| Collector-emitter saturation voltage | VCE(sat) |  |  | 1 | V | IC=600mA, IB=50mA | 2 |
| Base-emitter voltage | VBE |  |  | 1.5 | V | VCE=5V, IC=150mA | 2 |
| Transition frequency | fT | 140 |  |  | MHz | VCE=5V, IC=150mA | 2 |
| Collector output capacitance | Cob |  |  | 14 | pF | VCB=10V, IE=0, f=1MHz | 2 |

## CAD (KiCad official)

- Symbol: `2SD669U`
- Footprint: `Package_TO_SOT_SMD:SOT-89-3`
- 3D model: SOT-89 (KiCad packages3D, STEP)
- 3D model files: `2sd669u-etched.step` / `2sd669u-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `2sd669u.step` / `2sd669u.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [CBI datasheet](docs/2sd669u-datasheet.pdf) (4 pp, sha256 `580407ed60a58bf1`, retrieved 2026-11-05, 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/2sd669u-datasheet.pdf)