# KTA1504S-GR-RTK

**KEC Semicon** · Bipolar (BJT) · SOT-23

KTA1504S-GR-RTK from KEC Semicon, 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 | EMITTER | passive | Emitter terminal of the PNP transistor, with emitter-base voltage limited to -5 V (VEBO) and collector current limited to -150 mA (IC). |
| 2 | BASE | passive | Base terminal of the PNP transistor, with base current limited to -30 mA (IB). |
| 3 | COLLECTOR | passive | Collector terminal of the PNP transistor, with collector-emitter voltage rated -50 V (VCEO) and collector power dissipation of 150 mW (PC). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | KEC Semicon |
| 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 |
|---|---|---|---|---|---|---|---|
| hFE DC current gain (GR rank) | hFE | 200 |  | 400 |  | VCE=-6V, IC=-2mA | 1 |
| Transition frequency | fT | 80 |  |  | MHz | VCE=-10V, IC=-1mA | 1 |
| Collector-emitter saturation voltage | VCE(sat) |  | -0.1 | -0.3 | V | IC=-100mA, IB=-10mA | 1 |
| Collector output capacitance | Cob |  | 4 | 7 | pF | VCB=-10V, IE=0, f=1MHz | 1 |
| Noise figure | NF |  | 1 | 10 | dB | VCE=-6V, IC=-0.1mA, f=1kHz, Rg=10k | 1 |
| Collector cut-off current | ICBO |  |  | -0.1 | μA | VCB=-50V, IE=0 | 1 |
| Emitter cut-off current | IEBO |  |  | -0.1 | μA | VEB=-5V, IC=0 | 1 |
| Collector-base voltage | VCBO |  |  | -50 | V |  | 1 |
| Collector-emitter voltage | VCEO |  |  | -50 | V |  | 1 |
| Emitter-base voltage | VEBO |  |  | -5 | V |  | 1 |
| Collector current | IC |  |  | -150 | mA |  | 1 |
| Base current | IB |  |  | -30 | mA |  | 1 |
| Collector power dissipation | PC |  |  | 150 | mW | Ta=25 C | 1 |
| Junction temperature | Tj |  |  | 150 |  |  | 1 |
| Storage temperature range | Tstg | -55 |  | 150 |  |  | 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 150 mW | 1 |

## CAD (KiCad official)

- Symbol: `KTA1504S-GR-RTK`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `kta1504s-gr-rtk-etched.step` / `kta1504s-gr-rtk-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `kta1504s-gr-rtk.step` / `kta1504s-gr-rtk.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/8588987645221883905) (3 pp, sha256 `37b5efda8c23a59c`, 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/kta1504s-gr-rtk-datasheet.pdf)