# KTA1663-Y-RTF

**KEC Semicon** · Bipolar (BJT) · SOT-89

KTA1663-Y-RTF from KEC Semicon, in a SOT-89. 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 | BASE | passive | Base terminal of the PNP transistor; the base current IB is rated at -0.3 A maximum. |
| 2 | COLLECTOR (HEAT SINK) | passive | Collector terminal, also the heat-sink tab; collector current IC is rated at -1.5 A, and collector power dissipation PC* is 1 W when mounted on a ceramic substrate (250 mm² x 0.8t). |
| 3 | EMITTER | passive | Emitter terminal of the PNP transistor; the emitter-base voltage VEBO is rated at -5 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | KEC Semicon |
| Package | SOT-89 |
| 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 |  |  | -30 | V | Ta=25℃ | 1 |
| Collector-Emitter Voltage | VCEO |  |  | -30 | V | Ta=25℃ | 1 |
| Emitter-Base Voltage | VEBO |  |  | -5 | V | Ta=25℃ | 1 |
| Collector Current | IC |  |  | -1.5 | A | Ta=25℃ | 1 |
| Base Current | IB |  |  | -0.3 | A | Ta=25℃ | 1 |
| Collector Power Dissipation | PC |  |  | 500 | mW | Ta=25℃ | 1 |
| Collector Power Dissipation (mounted on ceramic substrate) | PC* |  |  | 1 | W | mounted on ceramic substrate (250mm2 x0.8t) | 1 |
| Junction Temperature | Tj |  |  | 150 | ℃ |  | 1 |
| Storage Temperature Range | Tstg | -55 |  | 150 | ℃ |  | 1 |
| Collector Cut-off Current | ICBO |  |  | -100 | nA | VCB=-30V, IE=0 | 1 |
| Emitter Cut-off Current | IEBO |  |  | -100 | nA | VEB=-5V, IC=0 | 1 |
| Collector-Emitter Breakdown Voltage | V(BR)CEO | -30 |  |  | V | IC=-10mA, IB=0 | 1 |
| Emitter-Base Breakdown Voltage | V(BR)EBO | -5 |  |  | V | IE=-1mA, IC=0 | 1 |
| DC Current Gain (rank Y) | hFE | 160 |  | 320 |  | VCE=-2V, IC=-500mA | 1 |
| Collector-Emitter Saturation Voltage | VCE(sat) |  |  | -2 | V | IC=-1.5A, IB=-0.03A | 1 |
| Base-Emitter Voltage | VBE |  |  | -1 | V | VCE=-2V, IC=-500mA | 1 |
| Collector Output Capacitance | Cob |  |  | 50 | pF | VCB=-10V, IE=0, f=1MHz | 1 |

## CAD (KiCad official)

- Symbol: `KTA1663-Y-RTF`
- Footprint: `Package_TO_SOT_SMD:SOT-89-3`
- 3D model: SOT-89 (KiCad packages3D, STEP)
- 3D model files: `kta1663-y-rtf-etched.step` / `kta1663-y-rtf-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `kta1663-y-rtf.step` / `kta1663-y-rtf.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/8586181899429007360) (2 pp, sha256 `0c2da4b3095370fb`, 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/kta1663-y-rtf-datasheet.pdf)