# BCP51-16

**Slkor SLKORMICRO Elec** · Bipolar (BJT) · SOT-223

BCP51-16 from Slkor SLKORMICRO Elec, in a SOT-223. 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 PNP transistor; the datasheet gives no pin-specific limit, and the BCP51-16 variant is in the hFE(2) rank 100-250 (VCE=-2V, IC=-150mA). |
| 2 | COLLECTOR | passive | Collector terminal; for BCP51 the datasheet limits are VCBO -45 V, VCEO -45 V and continuous collector current -1 A, with PC 1.5 W. |
| 3 | EMITTER | passive | Emitter terminal; the datasheet limits emitter-base voltage VEBO to -5 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Slkor SLKORMICRO Elec |
| Package | SOT-223 |
| 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 | -45 |  |  | V |  | 1 |
| Collector-Emitter Voltage | VCEO | -45 |  |  | V |  | 1 |
| Emitter-Base Voltage | VEBO | -5 |  |  | V |  | 1 |
| Collector Current -Continuous | IC | -1 |  |  | A |  | 1 |
| Collector Power Dissipation | PC |  |  | 1.5 | W |  | 1 |
| Storage Temperature Range | Tstg | -65 |  | 150 | ℃ |  | 1 |
| Thermal Resistance Junction to Ambient | RθJA |  |  | 94 | ℃/W |  | 1 |
| Collector-base breakdown voltage | V(BR)CBO | -45 |  |  | V | IC=-0.1mA,IE=0 | 1 |
| Collector-emitter breakdown voltage | V(BR)CEO | -45 |  |  | V | IC=-10mA,IB=0 | 1 |
| Base-emitter breakdown voltage | V(BR)EBO | -5 |  |  | V | IC=-10μA,IE=0 | 1 |
| Collector cut-off current | ICBO |  |  | -100 | nA | VCB=-30V,IE=0 | 1 |
| DC current gain hFE(1) | hFE(1) | 25 |  |  |  | VCE=-2V,IC=-5mA | 1 |
| DC current gain hFE(2) (BCP51-16 rank) | hFE(2) | 100 |  | 250 |  | VCE=-2V,IC=-150mA | 1 |
| DC current gain hFE(3) | hFE(3) | 25 |  |  |  | VCE=-2V,IC=-500mA | 1 |
| Collector-emitter saturation voltage | VCE(sat) |  |  | -0.5 | V | IC=-500mA,IB=-50mA | 1 |
| Base-emitter voltage | VBE |  |  | -1 | V | VCE=-2V,IC=-500mA | 1 |
| Transition frequency | fT | 100 |  |  | MHz | VCE=-10V,IC=-50mA,f=100MHz | 1 |

## CAD (KiCad official)

- Symbol: `BCP51-16`
- Footprint: `Package_TO_SOT_SMD:SOT-223-3_TabPin2`
- 3D model: SOT-223 (KiCad packages3D, STEP)
- 3D model files: `bcp51-16-etched.step` / `bcp51-16-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bcp51-16.step` / `bcp51-16.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Slkor SLKORMICRO Elec datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588947624405700608) (3 pp, sha256 `7f69f86bb4f62923`, retrieved 2026-10-18, 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/bcp51-16-datasheet.pdf)