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KRC119S-RTK

Public Made by Adom

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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.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 (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