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AO3435

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

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AO3435

Alpha & Omega Semicon · MOSFETs · SOT-23

AO3435 from Alpha & Omega 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 G input Gate; the datasheet shows operation with gate voltages as low as 1.5V, with VGS rated ±8V.
2 S passive Source; the body diode runs from drain to source, with a maximum continuous body-diode current of -1.4A.
3 D passive Drain; VDS is rated -20V, and continuous ID is -3.5A (10s) or -2.9A (steady state) at TA=25°C.

Key specifications

Parameter Value
Manufacturer Alpha & Omega Semicon
Package SOT-23
Category Transistors
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 Breakdown Voltage BVDSS -20 V ID=-250µA, VGS=0V 2
Zero Gate Voltage Drain Current IDSS -1 µA VDS=-20V, VGS=0V 2
Zero Gate Voltage Drain Current IDSS -5 µA VDS=-20V, VGS=0V, TJ=55°C 2
Gate-Body leakage current IGSS 100 nA VDS=0V, VGS=±8V 2
Gate Threshold Voltage VGS(th) -0.5 -0.65 -1 V VDS=VGS, ID=-250µA 2
On state drain current ID(ON) -25 A VGS=-4.5V, VDS=-5V 2
Static Drain-Source On-Resistance RDS(ON) 56 70 mΩ VGS=-4.5V, ID=-3.5A 2
Static Drain-Source On-Resistance RDS(ON) 80 100 mΩ VGS=-4.5V, ID=-3.5A, TJ=125°C 2
Static Drain-Source On-Resistance RDS(ON) 70 90 mΩ VGS=-2.5V, ID=-3.0A 2
Static Drain-Source On-Resistance RDS(ON) 85 110 mΩ VGS=-1.8V, ID=-2.0A 2
Static Drain-Source On-Resistance RDS(ON) 100 130 mΩ VGS=-1.5V, ID=-0.5A 2
Diode Forward Voltage VSD -0.7 -1 V IS=-1A, VGS=0V 2
Maximum Body-Diode Continuous Current IS -1.4 A 2
Input Capacitance Ciss 510 745 pF VGS=0V, VDS=-10V, f=1MHz 2
Gate resistance Rg 18 23 Ω VGS=0V, VDS=0V, f=1MHz 2
Total Gate Charge Qg 5.6 11 nC VGS=-4.5V, VDS=-10V, ID=-3.5A 2
Body Diode Reverse Recovery Time trr 17 49 ns IF=-3.5A, dI/dt=100A/µs 2
Forward Transconductance gFS 15 S VDS=-5V, ID=-3.5A 2
Output Capacitance Coss 70 pF VGS=0V, VDS=-10V, f=1MHz 2
Reverse Transfer Capacitance Crss 52 pF VGS=0V, VDS=-10V, f=1MHz 2
Gate Source Charge Qgs 0.6 nC VGS=-4.5V, VDS=-10V, ID=-3.5A 2
Gate Drain Charge Qgd 1.8 nC VGS=-4.5V, VDS=-10V, ID=-3.5A 2
Turn-On Delay Time tD(on) 11 ns VGS=-4.5V, VDS=-10V, RL=3Ω, RGEN=6Ω 2
Turn-On Rise Time tr 10 ns VGS=-4.5V, VDS=-10V, RL=3Ω, RGEN=6Ω 2
Turn-Off Delay Time tD(off) 60 ns VGS=-4.5V, VDS=-10V, RL=3Ω, RGEN=6Ω 2
Turn-Off Fall Time tf 30 ns VGS=-4.5V, VDS=-10V, RL=3Ω, RGEN=6Ω 2
Body Diode Reverse Recovery Charge Qrr 4 nC IF=-3.5A, dI/dt=100A/µs 2
Drain-Source Voltage VDS -20 V TA=25°C 1
Gate-Source Voltage VGS -8 8 V TA=25°C 1
Continuous Drain Current, 10 s ID -3.5 A TA=25°C, 10 Sec 1
Continuous Drain Current, Steady State ID -2.9 A TA=25°C, Steady State 1
Continuous Drain Current, 10 s ID -2.7 A TA=70°C, 10 Sec 1
Continuous Drain Current, Steady State ID -2.3 A TA=70°C, Steady State 1
Pulsed Drain Current IDM -25 A 1
Power Dissipation, 10 s PD 1.4 W TA=25°C, 10 Sec 1
Power Dissipation, Steady State PD 1 W TA=25°C, Steady State 1
Power Dissipation, 10 s PD 0.9 W TA=70°C, 10 Sec 1
Power Dissipation, Steady State PD 0.6 W TA=70°C, Steady State 1
Junction and Storage Temperature Range TJ, TSTG -55 150 °C 1
Maximum Junction-to-Ambient RθJA 70 90 °C/W t ≤ 10s 1
Maximum Junction-to-Ambient RθJA 100 125 °C/W Steady-State 1
Maximum Junction-to-Lead RθJL 63 80 °C/W Steady-State 1

Materials and finish

As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).

Part Material Colour / plating Datasheet says Page
contacts silver Lead Frame Bare Cu Die Attach Ag Epoxy 10

CAD (KiCad official)

  • Symbol: AO3435
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)
  • 3D model files: ao3435-etched.step / ao3435-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ao3435.step / ao3435.glb are the bare package body.

Provenance

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

  • Datasheet: Alpha & Omega Semicon datasheet (11 pp, sha256 bd4f309c4a8ae37d, retrieved 2026-10-26, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-opus-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