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KRC108S-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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KRC108S-RTK
KEC Semicon · Digital Transistors · SOT-23
KRC108S-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 | COMMON (EMITTER) | passive | Common emitter terminal, the reference node for the built-in bias-resistor NPN stage; the datasheet gives no separate voltage or current limit for this pin. |
| 2 | IN (BASE) | input | Input (base) pin, with a built-in bias resistor R1 of 22 kΩ for KRC108S; the input voltage is rated 40 V / -7 V for KRC108S. |
| 3 | OUT (COLLECTOR) | output | Output (collector) pin, rated for an output voltage of 50 V and an output current of 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 | 80 | 150 | 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) | 1.8 | 2.6 | V | VO=0.2V, IO=5mA | 2 | |
| Input Voltage (OFF) | VI(OFF) | 0.6 | 0.88 | V | VO=5V, IO=0.1mA | 2 | |
| Input Current | II | 0.36 | mA | VI=5V | 2 | ||
| Input Resistor R1 | R1 | 15.4 | 22 | 28.6 | k | 2 | |
| Resistor Ratio | R2/R1 | 1.7 | 2.1 | 2.6 | 2 | ||
| Output Voltage (absolute maximum) | VO | 50 | V | Ta=25 | 1 | ||
| Input Voltage (absolute maximum) | VI | -7 | 40 | V | Ta=25 | 1 | |
| Output Current | IO | 100 | mA | Ta=25 | 1 | ||
| Power Dissipation | PD | 200 | mW | Ta=25 | 1 | ||
| Junction Temperature | Tj | 150 | °C | Ta=25 | 1 | ||
| Storage Temperature Range | Tstg | -55 | 150 | °C | 1 |
CAD (KiCad official)
- Symbol:
KRC108S-RTK - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
krc108s-rtk-etched.step/krc108s-rtk-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);krc108s-rtk.step/krc108s-rtk.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: KEC Semicon datasheet (4 pp, sha256
a093e97e0c2a60cc, retrieved 2026-10-17, 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).
# KRC108S-RTK
**KEC Semicon** · Digital Transistors · SOT-23
KRC108S-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 | COMMON (EMITTER) | passive | Common emitter terminal, the reference node for the built-in bias-resistor NPN stage; the datasheet gives no separate voltage or current limit for this pin. |
| 2 | IN (BASE) | input | Input (base) pin, with a built-in bias resistor R1 of 22 kΩ for KRC108S; the input voltage is rated 40 V / -7 V for KRC108S. |
| 3 | OUT (COLLECTOR) | output | Output (collector) pin, rated for an output voltage of 50 V and an output current of 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 | 80 | 150 | | | 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) | | 1.8 | 2.6 | V | VO=0.2V, IO=5mA | 2 |
| Input Voltage (OFF) | VI(OFF) | 0.6 | 0.88 | | V | VO=5V, IO=0.1mA | 2 |
| Input Current | II | | | 0.36 | mA | VI=5V | 2 |
| Input Resistor R1 | R1 | 15.4 | 22 | 28.6 | k | | 2 |
| Resistor Ratio | R2/R1 | 1.7 | 2.1 | 2.6 | | | 2 |
| Output Voltage (absolute maximum) | VO | | | 50 | V | Ta=25 | 1 |
| Input Voltage (absolute maximum) | VI | -7 | | 40 | V | Ta=25 | 1 |
| Output Current | IO | | | 100 | mA | Ta=25 | 1 |
| Power Dissipation | PD | | | 200 | mW | Ta=25 | 1 |
| Junction Temperature | Tj | | | 150 | °C | Ta=25 | 1 |
| Storage Temperature Range | Tstg | -55 | | 150 | °C | | 1 |
## CAD (KiCad official)
- Symbol: `KRC108S-RTK`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `krc108s-rtk-etched.step` / `krc108s-rtk-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `krc108s-rtk.step` / `krc108s-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/8586179975628132352) (4 pp, sha256 `a093e97e0c2a60cc`, retrieved 2026-10-17, 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/krc108s-rtk-datasheet.pdf)