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KY3401

Public Made by Adom

by adom

KY MOSFETs, SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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KY3401

KY · MOSFETs · SOT-23

KY3401 from KY, 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 GATE input Gate terminal of the P-channel MOSFET; the gate-source voltage VGSS is rated ±12 V.
2 SOURCE passive Source terminal of the P-channel MOSFET; the datasheet gives no pin-specific limit, and the device is rated VDSS -30 V with continuous ID -4.2 A at Ta=25°C.
3 DRAIN passive Drain terminal of the P-channel MOSFET; the drain-source voltage VDSS is rated -30 V and continuous drain current is -4.2 A at Ta=25°C.

Key specifications

Parameter Value
Manufacturer KY
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
Drain-Source Voltage VDSS -30 V 1
Gate-Source Voltage VGSS -12 12 V 1
Continuous Drain Current ID -4.2 A Ta = 25℃ 1
Continuous Drain Current ID -2.7 A Ta = 100℃ 1
Pulsed Drain Current IDM -30 A note1 1
Power Dissipation PD 1.5 W Ta = 25℃ 1
Thermal Resistance, Junction to Ambient RθJA 83 ℃/W 1
Operating and Storage Temperature Range TJ, TSTG -55 150 ℃ 1
Drain-Source Breakdown Voltage V(BR)DSS -30 V VGS=0V, ID= -250μA 2
Zero Gate Voltage Drain Current IDSS -1 μA VDS = -30V, VGS = 0V 2
Gate to Body Leakage Current IGSS -100 100 nA VDS =0V, VGS = ±12V 2
Gate Threshold Voltage VGS(th) -0.6 -0.9 -1.3 V VDS= VGS, ID=-250μA 2
Static Drain-Source on-Resistance RDS(on) 45 55 mΩ VGS =-10V, ID =-4A 2
Static Drain-Source on-Resistance RDS(on) 53 68 mΩ VGS =-4.5V, ID =-3A 2
Static Drain-Source on-Resistance RDS(on) 72 96 mΩ VGS =-2.5V, ID =-1A 2
Maximum Continuous Drain to Source Diode Forward Current IS -4.2 A 2
Maximum Pulsed Drain to Source Diode Forward Current ISM -30 A 2
Drain to Source Diode Forward Voltage VSD -0.8 -1.2 V VGS = 0V, IS = -4.2A 2

CAD (KiCad official)

  • Symbol: KY3401
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)
  • 3D model files: ky3401-etched.step / ky3401-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ky3401.step / ky3401.glb are the bare package body.

Provenance

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

  • Datasheet: KY datasheet (5 pp, sha256 25a4939fc66b98d8, 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