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CMPTA42E TR PBFREE
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Central Semicon Bipolar (BJT), SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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CMPTA42E TR PBFREE
Central Semicon · Bipolar (BJT) · SOT-23
CMPTA42E TR PBFREE from Central 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 | Base | input | Base terminal of the CMPTA42E NPN transistor (CMPTA92E PNP complement); the datasheet gives the emitter-base maximum rating VEBO of 6.0 V. |
| 2 | Emitter | passive | Emitter terminal; the emitter-base voltage is limited to 6.0 V (VEBO) and continuous collector current to 500 mA. |
| 3 | Collector | passive | Collector terminal; the datasheet rates VCBO and VCEO at 350 V and continuous collector current IC at 500 mA. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Central 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 |
|---|---|---|---|---|---|---|---|
| Collector cutoff current | ICBO | 250 | nA | VCB=200V | 1 | ||
| Emitter cutoff current | IEBO | 100 | nA | VEB=3.0V | 1 | ||
| Collector-base breakdown voltage | BVCBO | 350 | 590 | V | IC=100µA | 1 | |
| Collector-emitter breakdown voltage | BVCEO | 350 | 475 | V | IC=1.0mA | 1 | |
| Emitter-base breakdown voltage | BVEBO | 6 | 8.7 | V | IE=100µA | 1 | |
| Collector-emitter saturation voltage | VCE(SAT) | 125 | 350 | mV | IC=50mA, IB=5.0mA | 1 | |
| Base-emitter saturation voltage | VBE(SAT) | 0.9 | V | IC=20mA, IB=2.0mA | 1 | ||
| DC current gain | hFE | 50 | 110 | VCE=10V, IC=1.0mA | 1 | ||
| Transition frequency | fT | 50 | 75 | MHz | VCE=20V, IC=10mA, f=100MHz | 1 | |
| Output capacitance | Cob | 6 | pF | VCB=20V, IE=0, f=1.0MHz | 1 | ||
| Collector-base voltage | VCBO | 350 | V | TA=25°C | 1 | ||
| Collector-emitter voltage | VCEO | 350 | V | TA=25°C | 1 | ||
| Emitter-base voltage | VEBO | 6 | V | TA=25°C | 1 | ||
| Continuous collector current | IC | 500 | mA | TA=25°C | 1 | ||
| Power dissipation | PD | 350 | mW | TA=25°C | 1 | ||
| Operating and storage junction temperature | TJ, Tstg | -65 | 150 | °C | 1 | ||
| Thermal resistance, junction to ambient | ΘJA | 357 | °C/W | 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 |
|---|---|---|---|---|
| contacts | tin | 1. If requesting Tin/Lead plated devices, add the suffix “ TIN/LEAD” to the part number when ordering (example: 2N2222A TIN/LEAD). | 3 |
CAD (KiCad official)
- Symbol:
CMPTA42E TR PBFREE - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
cmpta42e-tr-pbfree-etched.step/cmpta42e-tr-pbfree-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);cmpta42e-tr-pbfree.step/cmpta42e-tr-pbfree.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Central Semicon datasheet (3 pp, sha256
7fd35caeb6eb11a9, 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).
# CMPTA42E TR PBFREE
**Central Semicon** · Bipolar (BJT) · SOT-23
CMPTA42E TR PBFREE from Central 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 | Base | input | Base terminal of the CMPTA42E NPN transistor (CMPTA92E PNP complement); the datasheet gives the emitter-base maximum rating VEBO of 6.0 V. |
| 2 | Emitter | passive | Emitter terminal; the emitter-base voltage is limited to 6.0 V (VEBO) and continuous collector current to 500 mA. |
| 3 | Collector | passive | Collector terminal; the datasheet rates VCBO and VCEO at 350 V and continuous collector current IC at 500 mA. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Central 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 |
|---|---|---|---|---|---|---|---|
| Collector cutoff current | ICBO | | | 250 | nA | VCB=200V | 1 |
| Emitter cutoff current | IEBO | | | 100 | nA | VEB=3.0V | 1 |
| Collector-base breakdown voltage | BVCBO | 350 | 590 | | V | IC=100µA | 1 |
| Collector-emitter breakdown voltage | BVCEO | 350 | 475 | | V | IC=1.0mA | 1 |
| Emitter-base breakdown voltage | BVEBO | 6 | 8.7 | | V | IE=100µA | 1 |
| Collector-emitter saturation voltage | VCE(SAT) | | 125 | 350 | mV | IC=50mA, IB=5.0mA | 1 |
| Base-emitter saturation voltage | VBE(SAT) | | | 0.9 | V | IC=20mA, IB=2.0mA | 1 |
| DC current gain | hFE | 50 | 110 | | | VCE=10V, IC=1.0mA | 1 |
| Transition frequency | fT | 50 | 75 | | MHz | VCE=20V, IC=10mA, f=100MHz | 1 |
| Output capacitance | Cob | | | 6 | pF | VCB=20V, IE=0, f=1.0MHz | 1 |
| Collector-base voltage | VCBO | | | 350 | V | TA=25°C | 1 |
| Collector-emitter voltage | VCEO | | | 350 | V | TA=25°C | 1 |
| Emitter-base voltage | VEBO | | | 6 | V | TA=25°C | 1 |
| Continuous collector current | IC | | | 500 | mA | TA=25°C | 1 |
| Power dissipation | PD | | | 350 | mW | TA=25°C | 1 |
| Operating and storage junction temperature | TJ, Tstg | -65 | | 150 | °C | | 1 |
| Thermal resistance, junction to ambient | ΘJA | | | 357 | °C/W | | 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 |
|---|---|---|---|---|
| contacts | | tin | 1. If requesting Tin/Lead plated devices, add the suffix “ TIN/LEAD” to the part number when ordering (example: 2N2222A TIN/LEAD). | 3 |
## CAD (KiCad official)
- Symbol: `CMPTA42E TR PBFREE`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `cmpta42e-tr-pbfree-etched.step` / `cmpta42e-tr-pbfree-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cmpta42e-tr-pbfree.step` / `cmpta42e-tr-pbfree.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Central Semicon datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8600504653503078400) (3 pp, sha256 `7fd35caeb6eb11a9`, 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/cmpta42e-tr-pbfree-datasheet.pdf)