# MMBT5551-TP

**MCC Micro Commercial Components** · Bipolar (BJT) · SOT-23

MMBT5551-TP from MCC Micro Commercial Components, in a SOT-23. 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; emitter-base breakdown voltage V(BR)EBO is 6.0V minimum and emitter cutoff current IEBO is 50nA maximum at VEB=4.0V. |
| 2 | E | passive | Emitter; V(BR)EBO of 6.0V minimum relative to the base, with IEBO at most 50nA at VEB=4.0V. |
| 3 | C | passive | Collector; V(BR)CEO 160V minimum, V(BR)CBO 180V minimum, collector current ICM=0.6A. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | MCC Micro Commercial Components |
| Package | SOT-23 |
| 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-Emitter Breakdown Voltage | V(BR)CEO | 160 |  |  | Vdc | IC=1.0mAdc, IB=0 | 1 |
| Collector-Base Breakdown Voltage | V(BR)CBO | 180 |  |  | Vdc | IC=100uAdc, IE=0 | 1 |
| Emitter-Base Breakdown Voltage | V(BR)EBO | 6 |  |  | Vdc | IE=10uAdc, IC=0 | 1 |
| Collector Cutoff Current | ICBO |  |  | 50 | nAdc | VCB=120Vdc, IE=0 | 1 |
| Emitter Cutoff Current | IEBO |  |  | 50 | nAdc | VEB=4.0Vdc, IC=0 | 1 |
| DC Current Gain | hFE-1 | 80 |  |  | --- | VCE=5.0Vdc, IC=1.0mAdc | 1 |
| DC Current Gain | hFE-2 | 100 |  | 300 | --- | VCE=5.0Vdc, IC=10mAdc | 1 |
| DC Current Gain | hFE-3 | 50 |  |  | --- | VCE=5.0Vdc, IC=50mAdc | 1 |
| Collector-Emitter Saturation Voltage | VCE(sat) |  |  | 0.2 | Vdc | IC=50mAdc, IB=5.0mAdc | 1 |
| Base-Emitter Saturation Voltage | VBE(sat) |  |  | 1 | Vdc | IC=50mAdc, IB=5.0mAdc | 1 |
| Current Gain-Bandwidth Product | fT | 100 |  | 300 | MHz | IC=10mAdc, VCE=5.0Vdc, f=30MHz | 1 |
| Collector Current (Features list) | ICM |  |  | 0.6 | A |  | 1 |
| Operating and Storage Temperature (Features list) |  | -55 |  | 150 | °C |  | 1 |
| Power Dissipation (Features list) |  |  |  | 0.3 | W |  | 1 |

## CAD (KiCad official)

- Symbol: `MMBT5551-TP`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `mmbt5551-tp-etched.step` / `mmbt5551-tp-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mmbt5551-tp.step` / `mmbt5551-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/8586187202041036800) (2 pp, sha256 `29431f193a294cf4`, retrieved 2026-10-18, 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/mmbt5551-tp-datasheet.pdf)