# BC857BS-TP

**MCC Micro Commercial Components** · Bipolar (BJT) · SOT-363

BC857BS-TP from MCC Micro Commercial Components, in a SOT-363. 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 | E1 | passive | Emitter of transistor 1 (dual PNP, multi-chip device); maximum emitter-base voltage VEBO is -5 V and maximum collector current IC is -200 mA. |
| 2 | B1 | passive | Base of transistor 1; the base-emitter voltage is specified at VBE -0.65 V to -0.82 V under test conditions IC=-2 mA, VCE=-5 V. |
| 3 | C2 | passive | Collector of transistor 2; maximum collector-base voltage VCBO is -50 V and maximum collector-emitter voltage VCEO is -45 V. |
| 4 | E2 | passive | Emitter of transistor 2 (dual PNP, multi-chip device); maximum emitter-base voltage VEBO is -5 V and maximum collector current IC is -200 mA. |
| 5 | B2 | passive | Base of transistor 2; the base-emitter voltage is specified at VBE -0.65 V to -0.82 V under test conditions IC=-2 mA, VCE=-5 V. |
| 6 | C1 | passive | Collector of transistor 1; maximum collector-base voltage VCBO is -50 V and maximum collector-emitter voltage VCEO is -45 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | MCC Micro Commercial Components |
| Package | SOT-363 |
| Category | Transistors/Thyristors |
| Pins | 6 |

## 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 |  |  | -50 | V |  | 1 |
| Collector-Emitter Voltage | VCEO |  |  | -45 | V |  | 1 |
| Emitter-Base Voltage | VEBO |  |  | -5 | V |  | 1 |
| Collector Current | IC |  |  | -200 | mA |  | 1 |
| Collector Power Dissipation | PC |  |  | 300 | mW |  | 1 |
| Operating Junction Temperature Range |  | -55 |  | 150 | ℃ |  | 1 |
| Storage Temperature Range |  | -55 |  | 150 | ℃ |  | 1 |
| Thermal Resistance Junction to Ambient |  |  | 417 |  | ℃/W | Junction to Ambient | 1 |
| Collector-Emitter Breakdown Voltage | V(BR)CEO | -45 |  |  | V | IC=-10mA, IB=0 | 2 |
| Collector-Base Breakdown Voltage | V(BR)CBO | -50 |  |  | V | IC=-10µA, IE=0 | 2 |
| Emitter-Base Breakdown Voltage | V(BR)EBO | -5 |  |  | V | IE=-10µA, IC=0 | 2 |
| Collector-Base Cutoff Current | ICBO |  |  | -15 | nA | VCB=-30V, IE=0 | 2 |
| DC Current Gain | hFE | 220 |  | 475 |  | VCE=-5V, IC=-2mA | 2 |
| Collector-Emitter Saturation Voltage | VCE(sat) |  |  | -0.3 | V | IC=-10mA, IB=-0.5mA | 2 |
| Collector-Emitter Saturation Voltage | VCE(sat) |  |  | -0.65 | V | IC=-100mA, IB=-5mA | 2 |
| Base-Emitter Voltage | VBE | -0.6 |  | -0.75 | V | VCE=-5V, IC=-2mA | 2 |

## CAD (KiCad official)

- Symbol: `BC857BS-TP`
- Footprint: `Package_TO_SOT_SMD:SOT-363_SC-70-6`
- 3D model: SOT-363 (KiCad packages3D, STEP)
- 3D model files: `bc857bs-tp-etched.step` / `bc857bs-tp-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bc857bs-tp.step` / `bc857bs-tp.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [MCC Micro Commercial Components datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588917998442713088) (4 pp, sha256 `590df0cd1ba040a0`, retrieved 2026-10-19, 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/bc857bs-tp-datasheet.pdf)