component
KTC4075
Public Made by Adomby adom
Changjing Bipolar (BJT), SOT-323. 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
markdownKTC4075
Changjing · Bipolar (BJT) · SOT-323
KTC4075 from Changjing, in a SOT-323. 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 KTC4075 NPN transistor, with the datasheet's emitter-base voltage rating VEBO of 5 V. |
| 2 | EMITTER | passive | Emitter terminal of the KTC4075 NPN transistor, operating within the device ratings of VEBO 5 V and continuous collector current IC of 150 mA. |
| 3 | COLLECTOR | passive | Collector terminal of the KTC4075 NPN transistor, operating within the device ratings of VCBO 60 V, VCEO 50 V and continuous collector current IC of 150 mA. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| Package | SOT-323 |
| 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 breakdown voltage | V(BR)CBO | 60 | V | IC = 100µA, IE=0 | 1 | ||
| Collector-emitter breakdown voltage | V(BR)CEO | 50 | V | IC = 1mA, IB=0 | 1 | ||
| Emitter-base breakdown voltage | V(BR)EBO | 5 | V | IE= 100µA, IC=0 | 1 | ||
| Collector cut-off current | ICBO | 0.1 | µA | VCB=60V, IE=0 | 1 | ||
| Emitter cut-off current | IEBO | 0.1 | µA | VEB=5V, IC=0 | 1 | ||
| DC current gain | hFE | 70 | 700 | VCE= 6V, IC=2mA | 1 | ||
| Collector-emitter saturation voltage | VCEsat | 0.25 | V | IC=100mA, IB= 10mA | 1 | ||
| Transition frequency | fT | 80 | MHz | VCE=10V, IC= 1mA | 1 | ||
| Collector output capacitance | Cob | 3.5 | pF | VCE=10V, IE=0, f=1MHz | 1 | ||
| Noise figure | NF | 10 | dB | VCE=6V,IE=0.1mA, f=1KHz,RG=10KΩ | 1 | ||
| Collector-base voltage | VCBO | 60 | V | 1 | |||
| Collector-emitter voltage | VCEO | 50 | V | 1 | |||
| Emitter-base voltage | VEBO | 5 | V | 1 | |||
| Collector current, continuous | IC | 150 | mA | 1 | |||
| Total device dissipation | PD | 100 | mW | 1 | |||
| Operation junction and storage temperature range | TJ,Tstg | -55 | 150 | ℃ | 1 | ||
| Thermal resistance, junction to ambient | θJA | 1250 | ℃/W | 1 |
CAD (KiCad official)
- Symbol:
KTC4075 - Footprint:
Package_TO_SOT_SMD:SOT-323_SC-70 - 3D model: SOT-323 (KiCad packages3D, STEP)
- 3D model files:
ktc4075-etched.step/ktc4075-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ktc4075.step/ktc4075.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Changjing datasheet (4 pp, sha256
02b3bcd1779ab77c, retrieved 2026-10-18, 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).