component
KTA1668
Public Made by Adomby adom
Changjing Bipolar Transistors - BJT, SOT-89-3L. 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
markdownKTA1668
Changjing · Bipolar Transistors - BJT · SOT-89-3L
KTA1668 from Changjing, in a SOT-89-3L. 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 terminal of the PNP transistor, rated with an emitter-base breakdown voltage V(BR)EBO of -5 V minimum and a maximum emitter-base voltage VEBO of -5 V. |
| 2 | COLLECTOR | passive | Collector terminal, rated for a collector-emitter voltage VCEO of -60 V, a collector current IC of -1 A and a collector power dissipation PC of 500 mW. |
| 3 | EMITTER | passive | Emitter terminal, rated for an emitter-base voltage VEBO of -5 V and an operating junction and storage temperature range of -55 to 150 ℃. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| Package | SOT-89-3L |
| Category | Triode/MOS Tube/Transistor |
| 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 breakdown voltage | V(BR)CBO | -80 | V | IC=-0.1mA,IE=0 | 1 | ||
| Collector-emitter breakdown voltage | V(BR)CEO | -60 | V | IC=-1mA,IB=0 | 1 | ||
| Emitter-base breakdown voltage | V(BR)EBO | -5 | V | IE=-0.1mA,IC=0 | 1 | ||
| Collector cut-off current | ICBO | -0.1 | μA | VCB=-50V,IE=0 | 1 | ||
| Emitter cut-off current | IEBO | -0.1 | μA | VEB=-4V,IC=0 | 1 | ||
| DC current gain (hFE1) | hFE1 | 60 | 320 | VCE=-2V,IC=-50mA | 1 | ||
| DC current gain (hFE2) | hFE2 | 30 | VCE=-2V,IC=-1A | 1 | |||
| Collector-emitter saturation voltage | VCE(sat) | -0.7 | V | IC=-500mA,IB=-50mA | 1 | ||
| Base-emitter saturation voltage | VB E(sat) | -1.2 | V | IC=-500mA,IB=-50mA | 1 | ||
| Transition frequency | fT | 150 | MHz | VCE=-10V,IC=-50mA, f=100MHz | 1 | ||
| Collector output capacitance | Cob | 12 | pF | VCB=-10V,IE=0,f=1MHz | 1 | ||
| Collector-Base Voltage | VCBO | -80 | V | 1 | |||
| Collector-Emitter Voltage | VCEO | -60 | V | 1 | |||
| Emitter-Base Voltage | VEBO | -5 | V | 1 | |||
| Collector Current | IC | -1 | A | 1 | |||
| Collector power dissipation | PC | 500 | mW | 1 | |||
| Operation Junction and Storage Temperature Range | TJ,Tstg | -55 | 150 | ℃ | 1 |
CAD (KiCad official)
- Symbol:
KTA1668 - Footprint:
Package_TO_SOT_SMD:SOT-89-3 - 3D model: SOT-89-3L (KiCad packages3D, STEP)
- 3D model files:
kta1668-etched.step/kta1668-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);kta1668.step/kta1668.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Changjing datasheet (3 pp, sha256
b3dc8940e7d5b97e, retrieved 2026-11-05, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-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).