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KN4401S-RTK

Public Made by Adom

by adom

KEC Semicon Bipolar (BJT), SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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KN4401S-RTK

KEC Semicon · Bipolar (BJT) · SOT-23

KN4401S-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 transistor; the emitter-base voltage is limited to 6 V (VEBO) and the collector current to 600 mA.
2 BASE passive Base terminal of the NPN transistor; base-emitter voltage is specified with VBE(sat) of 0.75 to 0.95 V at IC=150 mA, IB=15 mA and up to 1.2 V at IC=500 mA, IB=50 mA.
3 COLLECTOR passive Collector terminal of the NPN transistor; the collector-emitter voltage is limited to 40 V (VCEO) and the collector power dissipation to 350 mW.

Key specifications

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

CAD (KiCad official)

  • Symbol: KN4401S-RTK
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)
  • 3D model files: kn4401s-rtk-etched.step / kn4401s-rtk-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); kn4401s-rtk.step / kn4401s-rtk.glb are the bare package body.

Provenance

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

  • Datasheet: KEC Semicon datasheet (3 pp, sha256 c79eb053b02a8348, 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