component

KY3400

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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KY3400

KY · MOSFETs · SOT-23

KY3400 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 30 V N-channel MOSFET, rated for gate-source voltage VGSS of ±12 V.
2 SOURCE passive Source terminal, the reference for the ±12 V gate-source rating and the 30 V drain-source rating (VDSS).
3 DRAIN passive Drain terminal, rated for drain-source voltage VDSS of 30 V and continuous drain current ID of 5.8 A (pulsed IDM 30 A).

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 5.8 A 1
Pulsed Drain Current IDM 30 A note1: Pulse Width < 300µs, Duty Cycle ≤2% 1
Power Dissipation PD 0.35 W 1
Thermal Resistance, Junction to Ambient RθJA 357 ℃/W 1
Operating and Storage Temperature Range TSTG -55 150 ℃ 1
Operating and Storage Temperature Range (junction) TJ 150 ℃ 1
Drain-Source Breakdown Voltage V(BR)DSS 30 31.5 V VGS = 0V, ID = 250μA 2
Zero Gate Voltage Drain Current IDSS 1 μA VDS = 30V, VGS = 0V, TJ = 25℃ 2
Gate to Body Leakage Current IGSS -100 100 nA VGS = ±12V, VDS = 0V 2
Gate Threshold Voltage VGS(th) 0.7 1 1.4 V VDS = VGS, ID = 250μA 2
Static Drain-Source On-Resistance RDS(on) 21 33 mΩ VGS = 10V, ID = 5A 2
Static Drain-Source On-Resistance RDS(on) 25 39 mΩ VGS = 4.5V, ID = 4A 2
Static Drain-Source On-Resistance RDS(on) 36 60 mΩ VGS = 2.5V, ID = 3A 2
Drain to Source Diode Forward Voltage VSD 0.8 1 V VGS = 0V, ISD = 1A, TJ = 25℃ 2
Input Capacitance Ciss 1155 pF VDS = 15V, VGS = 0V, f = 1.0MHz 2
Turn-On Delay Time td(on) 5 ns VGS = 10V, VDS = 15V, RL = 2.7Ω, RGEN = 3Ω 2
Turn-On Rise Time tr 7 ns VGS = 10V, VDS = 15V, RL = 2.7Ω, RGEN = 3Ω 2
Turn-Off Delay Time td(off) 40 ns VGS = 10V, VDS = 15V, RL = 2.7Ω, RGEN = 3Ω 2
Turn-Off Fall Time tf 6 ns VGS = 10V, VDS = 15V, RL = 2.7Ω, RGEN = 3Ω 2

CAD (KiCad official)

  • Symbol: KY3400
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)
  • 3D model files: ky3400-etched.step / ky3400-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ky3400.step / ky3400.glb are the bare package body.

Provenance

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

  • Datasheet: KY datasheet (5 pp, sha256 5d9b0374c7af0a9d, 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