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KRC243S-RTK

Public Made by Adom

by adom

KEC Semicon Digital Transistors, SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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KRC243S-RTK

KEC Semicon · Digital Transistors · SOT-23

KRC243S-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 NPN transistor, shared by the internal bias resistor network; the datasheet gives no separate voltage or current limit for this pin.
2 IN (BASE) input Base input, connected to the internal input resistor R1 (4.7 kΩ typical for KRC243S); the input voltage rating is 20 V / −10 V and the input current is at most 1.8 mA at VI = 5 V.
3 OUT (COLLECTOR) output Collector output with a rating of 50 V output voltage and 800 mA maximum output current; output cut-off current is at most 10 µA at VO = 30 V with VI = 0.

Key specifications

Parameter Value
Manufacturer KEC Semicon
Package SOT-23
Category Transistors/Thyristors
Pins 3

CAD (KiCad official)

  • Symbol: KRC243S-RTK
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)
  • 3D model files: krc243s-rtk-etched.step / krc243s-rtk-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); krc243s-rtk.step / krc243s-rtk.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: KEC Semicon datasheet (5 pp, sha256 43f104429e34af23, retrieved 2026-10-09, 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