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AOD508

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Alpha Omega Semicon MOSFETs, TO-252. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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AOD508

Alpha Omega Semicon · MOSFETs · TO-252

AOD508 from Alpha Omega Semicon, in a TO-252. 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 terminal of the N-channel MOSFET; gate-source voltage is rated ±20 V.
2 D passive Drain terminal; rated 30 V drain-source with ID of 70 A at VGS=10 V, and also electrically connected to the tab.
3 S passive Source terminal; reference for gate drive and body diode (maximum body-diode continuous current 58 A, package limited).

Key specifications

Parameter Value
Manufacturer Alpha Omega Semicon
Package TO-252
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 Voltage VDS 30 V 1
Gate-Source Voltage VGS -20 20 V 1
VDS Spike VSPIKE 36 V 100ns 1
Junction and Storage Temperature Range TJ, TSTG -55 175 °C 1
Continuous Drain Current ID 70 A TC=25°C 1
Continuous Drain Current ID 55 A TC=100°C 1
Continuous Drain Current IDSM 22 A TA=25°C 1
Continuous Drain Current IDSM 18 A TA=70°C 1
Pulsed Drain Current IDM 159 A 1
Avalanche Current IAS 37 A 1
Avalanche energy EAS 68 mJ L=0.1mH 1
Power Dissipation PDSM 2.5 W TA=25°C 1
Power Dissipation PDSM 1.6 W TA=70°C 1
Power Dissipation PD 50 W TC=25°C 1
Power Dissipation PD 25 W TC=100°C 1
Drain-Source Breakdown Voltage BVDSS 30 V ID=250µA, VGS=0V 2
Zero Gate Voltage Drain Current IDSS 1 µA VDS=30V, VGS=0V 2
Zero Gate Voltage Drain Current IDSS 5 µA VDS=30V, VGS=0V, TJ=55°C 2
Gate-Body leakage current IGSS 100 nA VDS=0V, VGS=±20V 2
Gate Threshold Voltage VGS(th) 1.2 1.8 2.2 V VDS=VGS, ID=250µA 2
Static Drain-Source On-Resistance RDS(ON) 2.4 3 mΩ VGS=10V, ID=20A 2
Static Drain-Source On-Resistance RDS(ON) 3.5 4.4 mΩ TJ=125°C 2
Static Drain-Source On-Resistance RDS(ON) 3.3 4.5 mΩ VGS=4.5V, ID=20A 2
Diode Forward Voltage VSD 0.7 1 V IS=1A, VGS=0V 2
Maximum Body-Diode Continuous Current IS 58 A 2
Gate resistance Rg 0.9 1.8 2.7 Ω VGS=0V, VDS=0V, f=1MHz 2
Thermal Resistance Junction-to-Case, Steady-State RθJC 3 °C/W 1
Maximum Junction-to-Ambient RθJA 16 °C/W t ≤ 10s 1
Maximum Junction-to-Ambient RθJA 50 °C/W Steady-State 1
Forward Transconductance gFS 105 S VDS=5V, ID=20A 2
Input Capacitance Ciss 2010 pF VGS=0V, VDS=15V, f=1MHz 2
Output Capacitance Coss 898 pF VGS=0V, VDS=15V, f=1MHz 2
Reverse Transfer Capacitance Crss 124 pF VGS=0V, VDS=15V, f=1MHz 2
Total Gate Charge (10V) Qg 36 49 nC VGS=10V, VDS=15V, ID=20A 2
Total Gate Charge (4.5V) Qg 17 23 nC VGS=4.5V, VDS=15V, ID=20A 2
Gate Source Charge Qgs 6 nC VGS=10V, VDS=15V, ID=20A 2
Gate Drain Charge Qgd 8 nC VGS=10V, VDS=15V, ID=20A 2
Turn-On DelayTime tD(on) 7.5 ns VGS=10V, VDS=15V, RL=0.75Ω, RGEN=3Ω 2
Turn-On Rise Time tr 4 ns VGS=10V, VDS=15V, RL=0.75Ω, RGEN=3Ω 2
Turn-Off DelayTime tD(off) 37 ns VGS=10V, VDS=15V, RL=0.75Ω, RGEN=3Ω 2
Turn-Off Fall Time tf 7.5 ns VGS=10V, VDS=15V, RL=0.75Ω, RGEN=3Ω 2
Body Diode Reverse Recovery Time trr 14 ns IF=20A, dI/dt=500A/µs 2
Body Diode Reverse Recovery Charge Qrr 20.3 nC IF=20A, dI/dt=500A/µs 2

CAD (KiCad official)

  • Symbol: AOD508
  • Footprint: Package_TO_SOT_SMD:TO-252-2
  • 3D model: TO-252 (KiCad packages3D, STEP)
  • 3D model files: aod508-etched.step / aod508-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); aod508.step / aod508.glb are the bare package body.

Provenance

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

  • Datasheet: Alpha Omega Semicon datasheet (6 pp, sha256 4a384784a615239f, 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