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KRC119S-RTK
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KEC Semicon Digital Transistors, SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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KRC119S-RTK
KEC Semicon · Digital Transistors · SOT-23
KRC119S-RTK from KEC 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 | EMITTER | passive | Emitter terminal of the NPN epitaxial planar transistor with built-in bias resistors; device output current is rated to 100 mA and output voltage to 50 V. |
| 2 | BASE | input | Base terminal, which connects to the IN side of the internal bias network (R1 = 4.7 kΩ, R2 = 10 kΩ for KRC119S); KRC119S input voltage is rated 20 V / -7 V. |
| 3 | COLLECTOR | passive | Collector terminal, which connects to the OUT side of the internal bias network; device output voltage is rated to 50 V and output current to 100 mA. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | KEC 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 |
|---|---|---|---|---|---|---|---|
| Output Cut-off Current | IO(OFF) | 500 | nA | VO=50V, VI=0 | 2 | ||
| DC Current Gain | GI | 30 | VO=5V, IO=10mA | 2 | |||
| Output Voltage | VO(ON) | 0.1 | 0.3 | V | IO=10mA, II=0.5mA | 2 | |
| Input Voltage (ON) | VI(ON) | 1.76 | 2.5 | V | VO=0.3V, IO=20mA | 2 | |
| Input Voltage (OFF) | VI(OFF) | 0.3 | 0.82 | V | VCC=5V, IO=100μA | 2 | |
| Input Current | II | 1.8 | mA | VI=5V | 2 | ||
| Input Resistor | R1 | 3.29 | 4.7 | 6.11 | kΩ | 2 | |
| Resistor Ratio | R2/R1 | 1.7 | 2.1 | 2.6 | 2 | ||
| Output Voltage | VO | 50 | V | 1 | |||
| Input Voltage | VI | -7 | 20 | V | KRC119S | 1 | |
| Output Current | IO | 100 | mA | 1 | |||
| Power Dissipation | PD | 200 | mW | 1 | |||
| Junction Temperature | Tj | 150 | °C | 1 | |||
| Storage Temperature Range | Tstg | -55 | 150 | °C | 1 | ||
| Bias Resistor R2 | R2 | 10 | kΩ | 1 |
CAD (KiCad official)
- Symbol:
KRC119S-RTK - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
krc119s-rtk-etched.step/krc119s-rtk-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);krc119s-rtk.step/krc119s-rtk.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: KEC Semicon datasheet (6 pp, sha256
eb45eda6a724cbc9, 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).
# KRC119S-RTK
**KEC Semicon** · Digital Transistors · SOT-23
KRC119S-RTK from KEC 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 | EMITTER | passive | Emitter terminal of the NPN epitaxial planar transistor with built-in bias resistors; device output current is rated to 100 mA and output voltage to 50 V. |
| 2 | BASE | input | Base terminal, which connects to the IN side of the internal bias network (R1 = 4.7 kΩ, R2 = 10 kΩ for KRC119S); KRC119S input voltage is rated 20 V / -7 V. |
| 3 | COLLECTOR | passive | Collector terminal, which connects to the OUT side of the internal bias network; device output voltage is rated to 50 V and output current to 100 mA. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | KEC 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 |
|---|---|---|---|---|---|---|---|
| Output Cut-off Current | IO(OFF) | | | 500 | nA | VO=50V, VI=0 | 2 |
| DC Current Gain | GI | 30 | | | | VO=5V, IO=10mA | 2 |
| Output Voltage | VO(ON) | | 0.1 | 0.3 | V | IO=10mA, II=0.5mA | 2 |
| Input Voltage (ON) | VI(ON) | | 1.76 | 2.5 | V | VO=0.3V, IO=20mA | 2 |
| Input Voltage (OFF) | VI(OFF) | 0.3 | 0.82 | | V | VCC=5V, IO=100μA | 2 |
| Input Current | II | | | 1.8 | mA | VI=5V | 2 |
| Input Resistor | R1 | 3.29 | 4.7 | 6.11 | kΩ | | 2 |
| Resistor Ratio | R2/R1 | 1.7 | 2.1 | 2.6 | | | 2 |
| Output Voltage | VO | | | 50 | V | | 1 |
| Input Voltage | VI | -7 | | 20 | V | KRC119S | 1 |
| Output Current | IO | | | 100 | mA | | 1 |
| Power Dissipation | PD | | | 200 | mW | | 1 |
| Junction Temperature | Tj | | | 150 | °C | | 1 |
| Storage Temperature Range | Tstg | -55 | | 150 | °C | | 1 |
| Bias Resistor R2 | R2 | | 10 | | kΩ | | 1 |
## CAD (KiCad official)
- Symbol: `KRC119S-RTK`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `krc119s-rtk-etched.step` / `krc119s-rtk-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `krc119s-rtk.step` / `krc119s-rtk.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/8586182781517250560) (6 pp, sha256 `eb45eda6a724cbc9`, 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/krc119s-rtk-datasheet.pdf)