# BC846BW

**Guangdong Hottech** · Bipolar (BJT) · SOT-323

BC846BW from Guangdong Hottech, 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 | B | input | Base of the NPN transistor, shown at the bottom-left of the SOT-323 diagram; VEBO is 6 V max and VBE(ON) is 0.58-0.7 V at VCE=5V, IC=2mA. |
| 2 | E | passive | Emitter of the NPN transistor, shown at the bottom-right of the SOT-323 diagram; IC is 100 mA max and VEBO is 6 V max. |
| 3 | C | passive | Collector of the NPN transistor, the single lead on top of the SOT-323 diagram; VCBO is 80 V, VCEO is 65 V and IC is 100 mA max. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Guangdong Hottech |
| 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 breakdown voltage | V(BR)CBO | 80 |  |  | V | IC=10uA, IE=0 | 1 |
| Collector-emitter breakdown voltage | V(BR)CEO | 65 |  |  | V | IC=10mA, IB=0 | 1 |
| Emitter-base breakdown voltage | V(BR)EBO | 6 |  |  | V | IE=1uA, IC=0 | 1 |
| Collector cut-off current | ICBO |  |  | 15 | nA | VCB=30V, IE=0 | 1 |
| DC current gain | hFE | 90 |  |  |  | VCE=5V, IC=10uA | 1 |
| DC current gain | hFE | 110 |  | 450 |  | VCE=5V, IC=2mA | 1 |
| DC current gain, rank BC846BW | hFE | 200 |  | 450 |  |  | 1 |
| Collector-emitter saturation voltage | VCE(sat) |  |  | 0.25 | V | IC=10mA, IB=0.5mA | 1 |
| Collector-emitter saturation voltage | VCE(sat) |  |  | 0.6 | V | IC=100mA, IB=5mA | 1 |
| Base-emitter saturation voltage | VBE(sat) |  |  | 0.7 | V | IC=10mA, IB=0.5mA | 1 |
| Base-emitter saturation voltage | VBE(sat) |  |  | 0.9 | V | IC=100mA, IB=5mA | 1 |
| Base-emitter voltage | VBE(ON) | 0.58 | 0.66 | 0.7 | V | VCE=5V, IC=2mA | 1 |
| Base-emitter voltage | VBE(ON) |  |  | 0.77 | V | VCE=5V, IC=10mA | 1 |
| Transition frequency | fT | 100 |  |  | MHz | VCE=5V, IC=10mA, f=100MHz | 1 |
| Collector output capacitance | Cob |  |  | 8 | pF | VCB=10V, f=1MHz | 1 |
| Noise figure | NF |  |  | 10 | dB | VCE=5V, IC=0.2mA, RS=2kΩ, f=1KMHz, BW=200Hz | 1 |
| Collector-base voltage | VCBO |  |  | 80 | V | TA = 25°C | 1 |
| Collector-emitter voltage | VCEO |  |  | 65 | V | TA = 25°C | 1 |
| Emitter-base voltage | VEBO |  |  | 6 | V | TA = 25°C | 1 |
| Collector current | IC |  |  | 100 | mA | TA = 25°C | 1 |
| Collector power dissipation | PC |  |  | 150 | mW | TA = 25°C | 1 |
| Junction temperature | TJ |  |  | 150 | °C |  | 1 |
| Storage temperature | TSTG | -55 |  | 150 | °C |  | 1 |
| Thermal resistance, junction to ambient | RθJA |  |  | 833 | °C/W |  | 1 |

## CAD (KiCad official)

- Symbol: `BC846BW`
- Footprint: `Package_TO_SOT_SMD:SOT-323_SC-70`
- 3D model: SOT-323 (KiCad packages3D, STEP)
- 3D model files: `bc846bw-etched.step` / `bc846bw-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bc846bw.step` / `bc846bw.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Guangdong Hottech datasheet](docs/bc846bw-datasheet.pdf) (4 pp, sha256 `1ca8300b001e5ce4`, retrieved 2026-11-04, 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/bc846bw-datasheet.pdf)