# KTD1302-AT

**KEC Semicon** · Bipolar (BJT) · TO-92-3

KTD1302-AT from KEC Semicon, in a TO-92-3. 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 of the NPN transistor, with the datasheet rating VEBO of 12 V and collector current IC limited to 300 mA. |
| 2 | COLLECTOR | passive | Collector of the NPN transistor, rated VCBO 25 V, VCEO 20 V, IC 300 mA and PC 625 mW. |
| 3 | BASE | input | Base of the NPN transistor, with base current IB limited to 30 mA. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | KEC Semicon |
| Package | TO-92-3 |
| 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 Cut-off Current | ICBO |  |  | 0.1 | µA | VCB=25V, IE=0 | 1 |
| Emitter Cut-off Current | IEBO |  |  | 0.1 | µA | VEB=12V, IC=0 | 1 |
| DC Current Gain (FOR) | hFE(1) | 200 |  | 800 |  | VCE=2V, IC=4mA | 1 |
| DC Current Gain (REV) | hFE(2) | 20 |  |  |  | VCE=2V, IC=4mA | 1 |
| Collector-Emitter Saturation Voltage | VCE(sat) |  |  | 0.25 | V | IC=100mA, IB=10mA | 1 |
| Base-Emitter Saturation Voltage | VBE(sat) |  |  | 1 | V | IC=100mA, IB=10mA | 1 |
| Collector-Base Voltage | VCBO |  |  | 25 | V | Ta=25°C | 1 |
| Collector-Emitter Voltage | VCEO |  |  | 20 | V | Ta=25°C | 1 |
| Emitter-Base Voltage | VEBO |  |  | 12 | V | Ta=25°C | 1 |
| Collector Current | IC |  |  | 300 | mA | Ta=25°C | 1 |
| Base Current | IB |  |  | 30 | mA | Ta=25°C | 1 |
| Collector Power Dissipation | PC |  |  | 625 | mW | Ta=25°C | 1 |
| Junction Temperature | Tj |  |  | 150 | °C |  | 1 |
| Storage Temperature Range | Tstg | -55 |  | 150 | °C |  | 1 |

## Materials and finish

As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).

| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| housing | PC |  | Base Current IB 30 mA Collector Power Dissipation PC 625 mW | 1 |

## CAD (KiCad official)

- Symbol: `KTD1302-AT`
- Footprint: `Package_TO_SOT_THT:TO-92_Inline`
- 3D model: TO-92-3 (KiCad packages3D, STEP)
- 3D model files: `ktd1302-at-etched.step` / `ktd1302-at-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ktd1302-at.step` / `ktd1302-at.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [KEC Semicon datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588895101137661952) (2 pp, sha256 `fc1b163a5589200f`, 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/ktd1302-at-datasheet.pdf)