component
KRC105S-RTK
Public Made by Adomby adom
KEC Semicon Bipolar (BJT), SOT-23. 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
markdownKRC105S-RTK
KEC Semicon · Bipolar (BJT) · SOT-23
KRC105S-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 of the built-in bias-resistor NPN transistor; the datasheet gives no voltage or current limit for this pin. |
| 2 | IN (BASE) | input | Input terminal (base) with built-in input resistor R1 = 2.2 kΩ for KRC105S; maximum input voltage rating is 12 V / -5 V. |
| 3 | OUT (COLLECTOR) | output | Output terminal (collector); maximum output voltage is 50 V and maximum output current is 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 Voltage | VO | 50 | V | 1 | |||
| Input Voltage | VI | -5 | 12 | V | 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 | ||
| Output Cut-off Current | IO(OFF) | 500 | nA | VO=50V, VI=0 | 2 | ||
| DC Current Gain | GI | 80 | 200 | VO=5V, IO=10mA | 2 | ||
| Output Voltage (ON) | VO(ON) | 0.1 | 0.3 | V | IO=10mA, II=0.5mA | 2 | |
| Input Voltage (ON) | VI(ON) | 0.8 | 1.1 | V | VO=0.2V, IO=5mA | 2 | |
| Input Voltage (OFF) | VI(OFF) | 0.5 | 0.65 | V | VO=5V, IO=0.1mA | 2 | |
| Input Current | II | 3.6 | mA | VI=5V | 2 | ||
| Input Resistor | R1 | 1.54 | 2.2 | 2.86 | k | 2 | |
| Resistor Ratio | R2/R1 | 17 | 21 | 26 | 2 |
CAD (KiCad official)
- Symbol:
KRC105S-RTK - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
krc105s-rtk-etched.step/krc105s-rtk-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);krc105s-rtk.step/krc105s-rtk.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: KEC Semicon datasheet (6 pp, sha256
e179271df0e53b9c, 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).