# BC846W

**Changjing** · Bipolar (BJT) · SOT-323

BC846W from Changjing, in a SOT-323. 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 NPN transistor; the emitter-base voltage VEBO is rated 6 V for BC846W and BC847W and 5 V for BC848W. |
| 2 | EMITTER | passive | Emitter terminal of the NPN transistor; the datasheet gives no emitter-specific limit, and the emitter-base ratings (VEBO 6 V for BC846W/BC847W, 5 V for BC848W) apply. |
| 3 | COLLECTOR | passive | Collector terminal of the NPN transistor; collector-emitter voltage VCEO is rated 65 V (BC846W), 45 V (BC847W) or 30 V (BC848W) and continuous collector current is 0.1 A. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| Package | SOT-323 |
| 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 (BC846W) | VCBO |  |  | 80 | V |  | 1 |
| Collector-Emitter Voltage (BC846W) | VCEO |  |  | 65 | V |  | 1 |
| Emitter-Base Voltage (BC846W) | VEBO |  |  | 6 | V |  | 1 |
| Collector Current - Continuous | IC |  |  | 0.1 | A |  | 1 |
| Collector Power Dissipation | PC |  |  | 150 | mW |  | 1 |
| Operation Junction and Storage Temperature Range | TJ,Tstg | -55 |  | 150 | ℃ |  | 1 |
| Collector-base breakdown voltage (BC846W) | VCBO | 80 |  |  | V | IC= 10µA, IE=0 | 2 |
| Collector-emitter breakdown voltage (BC846W) | VCEO | 65 |  |  | V | IC= 10mA, IB=0 | 2 |
| Emitter-base breakdown voltage (BC846W) | VEBO | 6 |  |  | V | IE= 1 µA, IC=0 | 2 |
| Collector Cutoff Current | ICBO |  |  | 15 | nA | VCB=30V | 2 |
| DC current gain (BC846AW) | hFE | 90 |  |  |  | VCE= 5V, IC= 10µA | 2 |
| DC current gain (BC846BW) | hFE | 150 |  |  |  | VCE= 5V, IC= 10µA | 2 |
| DC current gain (BC846AW) | hFE | 110 |  | 220 |  | VCE= 5V, IC= 2mA | 2 |
| DC current gain (BC846BW) | hFE | 200 |  | 450 |  | VCE= 5V, IC= 2mA | 2 |
| Collector-emitter saturation voltage | VCE(sat) |  |  | 0.25 | V | IC=10mA, IB= 0.5mA | 2 |
| Collector-emitter saturation voltage | VCE(sat) |  |  | 0.6 | V | IC=100mA, IB= 5mA | 2 |
| Base-emitter saturation voltage | VBE(sat) |  |  | 0.7 | V | IC=10mA, IB= 0.5mA | 2 |
| Base-emitter saturation voltage | VBE(sat) |  |  | 0.9 | V | IC=100mA, IB= 5mA | 2 |
| Base-emitter voltage | VBE(on) | 580 | 660 | 700 | mV | VCE= 5V, IC= 2mA | 2 |
| Base-emitter voltage | VBE(on) |  |  | 770 | mV | VCE= 5V, IC= 10mA | 2 |
| Transition frequency | fT | 100 |  |  | MHz | VCE= 5 V, IC= 10mA, f=100MHz | 2 |
| Collector output capacitance | Cob |  |  | 4.5 | pF | VCB=10V,f=1MHz | 2 |
| Noise figure (BC846AW, BC846BW) | NF |  |  | 10 | dB | VCE=5V,Ic=0.2mA, f=1KHz,RS=2KΩ, BW=200Hz | 2 |
| Junction To Ambient Thermal Resistance | RΘJA |  | 833 |  | ℃/W |  | 1 |

## CAD (KiCad official)

- Symbol: `BC846W`
- Footprint: `Package_TO_SOT_SMD:SOT-323_SC-70`
- 3D model: SOT-323 (KiCad packages3D, STEP)
- 3D model files: `bc846w-etched.step` / `bc846w-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bc846w.step` / `bc846w.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Changjing datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588944263362699264) (5 pp, sha256 `8a1d069380231a45`, retrieved 2026-10-09, 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/bc846w-datasheet.pdf)