# S9014C331

**ALJ** · Bipolar (BJT) · TO-92

S9014C331 from ALJ, in a TO-92. 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 | Emitter | passive | Emitter terminal of the NPN transistor; the emitter-base breakdown voltage V(BR)EBO is rated 5 V minimum and VEBO is 5 V. |
| 2 | Base | passive | Base terminal of the NPN transistor; VBE(sat) is 1 V at IC = 100 mA, IB = 5 mA. |
| 3 | Collector | passive | Collector terminal of the NPN transistor; ratings are VCBO 50 V, VCEO 45 V, and IC 100 mA, with PC 450 mW. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | ALJ |
| Package | TO-92 |
| 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 |  |  | 50 | V |  | 1 |
| Collector-emitter voltage | VCEO |  |  | 45 | V |  | 1 |
| Emitter-base voltage | VEBO |  |  | 5 | V |  | 1 |
| Collector current | IC |  |  | 100 | mA |  | 1 |
| Collector power dissipation | PC |  |  | 450 | mW |  | 1 |
| Junction temperature | Tj |  |  | 150 | °C |  | 1 |
| Storage temperature | Tstg | -55 |  | 150 | °C |  | 1 |
| Collector-base breakdown voltage | V(BR)CBO | 50 |  |  | V | IC = 100µA, IE = 0 | 1 |
| Collector-emitter breakdown voltage | V(BR)CEO* | 45 |  |  | V | IC = 1mA, IB = 0 | 1 |
| Emitter-base breakdown voltage | V(BR)EBO | 5 |  |  | V | IE = 100µA, IC = 0 | 1 |
| Collector cut-off current | ICBO |  |  | 100 | nA | VCB = 50V, IE = 0 | 1 |
| Collector cut-off current | ICEO |  |  | 1 | μA | VCE = 35V, IB = 0 | 1 |
| Emitter cut-off current | IEBO |  |  | 100 | nA | VEB = 5V, IC = 0 | 1 |
| DC current gain | hFE | 60 |  | 1000 |  | VCE = 5V, IC = 1mA | 1 |
| Collector-emitter saturation voltage | VCE(sat) |  |  | 0.3 | V | IC = 100mA, IB = 5mA | 1 |
| Base-emitter saturation voltage | VBE(sat) |  |  | 1 | V | IC = 100mA, IB = 5mA | 1 |
| Transition frequency | fT |  | 150 |  | MHz | VCE = 5V, IC = 10mA, f = 30MHz | 1 |

## CAD (KiCad official)

- Symbol: `S9014C331`
- Footprint: `Package_TO_SOT_THT:TO-92_Inline`
- 3D model: TO-92 (KiCad packages3D, STEP)
- 3D model files: `s9014c331-etched.step` / `s9014c331-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `s9014c331.step` / `s9014c331.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [ALJ datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603387221483266048) (2 pp, sha256 `ed82079a31adbb8c`, retrieved 2026-10-20, 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/s9014c331-datasheet.pdf)