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KTA1666-Y-RTF
Public Made by Adomby adom
KEC Semicon Bipolar Transistors - BJT, SOT-89. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownKTA1666-Y-RTF
KEC Semicon · Bipolar Transistors - BJT · SOT-89
KTA1666-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 | input | Base of the PNP transistor; base current rated up to -0.4A, with VEBO limit of -5V. |
| 2 | COLLECTOR | passive | Collector (also the heat sink tab); VCBO -50V, VCEO -50V, collector current IC up to -2A. |
| 3 | EMITTER | passive | Emitter of the PNP transistor; VEBO limit of -5V relative to base. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | KEC Semicon |
| Package | SOT-89 |
| Category | Transistors |
| 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=-50V, IE=0 | 1 | ||
| Emitter Cut-off Current | IEBO | -0.1 | µA | VEB=-5V, IC=0 | 1 | ||
| Collector-Emitter Breakdown Voltage | V(BR)CEO | -50 | V | IC=-10mA, IB=0 | 1 | ||
| DC Current Gain (Y rank) | hFE(1) | 120 | 240 | VCE=-2V, IC=-0.5A (Note 1); Y: 120-240 | 1 | ||
| DC Current Gain | hFE(2) | 40 | VCE=-2V, IC=-1.5A (Note 1) | 1 | |||
| Collector-Emitter Saturation Voltage | VCE(sat) | -0.5 | V | IC=-1A, IB=-0.05A (Note 1) | 1 | ||
| Base-Emitter Saturation Voltage | VBE(sat) | -1.2 | V | IC=-1A, IB=-0.05A (Note 1) | 1 | ||
| Collector-Base Voltage | VCBO | -50 | V | Ta=25°C | 1 | ||
| Collector-Emitter Voltage | VCEO | -50 | V | Ta=25°C | 1 | ||
| Emitter-Base Voltage | VEBO | -5 | V | Ta=25°C | 1 | ||
| Collector Current | IC | -2 | A | Ta=25°C | 1 | ||
| Base Current | IB | -0.4 | A | Ta=25°C | 1 | ||
| Collector Power Dissipation | PC | 500 | mW | Ta=25°C | 1 | ||
| Collector Power Dissipation, mounted on ceramic substrate | PC* | 1 | W | Mounted on ceramic substrate (250mm2 x0.8t) | 1 | ||
| Junction Temperature | Tj | 150 | °C | 1 | |||
| Storage Temperature Range | Tstg | -55 | 150 | °C | 1 | ||
| Transition Frequency | fT | 120 | MHz | VCE=-2V, IC=-0.5A | 1 | ||
| Collector Output Capacitance | Cob | 40 | pF | VCB=-10V, IE=0, f=1MHz | 1 | ||
| Turn-on Time | ton | 0.1 | µs | 1 | |||
| Storage Time | tstg | 1 | µs | 1 | |||
| Fall Time | tf | 0.1 | µs | 1 |
CAD (KiCad official)
- Symbol:
KTA1666-Y-RTF - Footprint:
Package_TO_SOT_SMD:SOT-89-3 - 3D model: SOT-89 (KiCad packages3D, STEP)
- 3D model files:
kta1666-y-rtf-etched.step/kta1666-y-rtf-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);kta1666-y-rtf.step/kta1666-y-rtf.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: KEC Semicon datasheet (3 pp, sha256
a8ec7a1a16e6ee51, retrieved 2026-10-22, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text), consensusclaude-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).