# MMBT9014D

**ST Semtech** · Bipolar (BJT) · SOT-23

MMBT9014D from ST Semtech, 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 of the NPN transistor; VEBO max 5 V, with hFE of 420 to 800 at VCE = 5 V, IC = 1 mA for the D grade. |
| 2 | E | passive | Emitter of the NPN transistor; emitter-base breakdown V(BR)EBO min 5 V at IE = 100 µA. |
| 3 | C | passive | Collector of the NPN transistor; VCEO max 45 V, VCBO max 50 V, IC max 100 mA, Ptot 200 mW. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | ST Semtech |
| 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 |
|---|---|---|---|---|---|---|---|
| DC Current Gain (group D, MMBT9014D) | hFE | 420 |  | 800 |  | at VCE = 5 V, IC = 1 mA | 1 |
| Collector Base Cutoff Current | ICBO |  |  | 50 | nA | at VCB = 50 V | 1 |
| Emitter Base Cutoff Current | IEBO |  |  | 50 | nA | at VEB = 5 V | 1 |
| Collector Base Breakdown Voltage | V(BR)CBO | 50 |  |  | V | at IC = 100 µA | 1 |
| Collector Emitter Breakdown Voltage | V(BR)CEO | 45 |  |  | V | at IC = 1 mA | 1 |
| Emitter Base Breakdown Voltage | V(BR)EBO | 5 |  |  | V | at IE = 100 µA | 1 |
| Collector Emitter Saturation Voltage | VCE(sat) |  |  | 0.25 | V | at IC = 100 mA, IB = 10 mA | 1 |
| Base Emitter Saturation Voltage | VBE(sat) |  |  | 1 | V | at IC = 100 mA, IB = 5 mA | 1 |
| Gain Bandwidth Product | fT | 100 |  |  | MHz | at VCE = 5 V, IC = 10 mA | 1 |
| Output Capacitance | Cob |  |  | 6 | pF | at VCB = 10 V, f = 1 MHz | 1 |
| Collector Base Voltage | VCBO |  |  | 50 | V | Ta = 25 OC | 1 |
| Collector Emitter Voltage | VCEO |  |  | 45 | V | Ta = 25 OC | 1 |
| Emitter Base Voltage | VEBO |  |  | 5 | V | Ta = 25 OC | 1 |
| Collector Current | IC |  |  | 100 | mA | Ta = 25 OC | 1 |
| Power Dissipation | Ptot |  |  | 200 | mW | Ta = 25 OC | 1 |
| Junction Temperature | Tj |  |  | 150 | °C | Ta = 25 OC | 1 |
| Storage Temperature Range | Tstg | -55 |  | 150 | °C |  | 1 |

## CAD (KiCad official)

- Symbol: `MMBT9014D`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `mmbt9014d-etched.step` / `mmbt9014d-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mmbt9014d.step` / `mmbt9014d.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [ST Semtech datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586187945829142528) (3 pp, sha256 `e5e4019cbf331b00`, 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/mmbt9014d-datasheet.pdf)