All Alternatives

Alternatives to ALPHA & OMEGA SEMICONDUCTOR AO3401

ALPHA & OMEGA SEMICONDUCTOR AO3401 and its qualified second sources, compared on form, fit and function, stock, lifecycle and price — the same checks Parter runs inside a BOM.

AO3401 compared against its qualified second sources
AO3401ALPHA & OMEGA SEMICONDUCTORAO3401AAlpha & Omega Semiconductor Inc.AOSS21311CAlpha & Omega Semiconductor Inc.+3more
FFF CompatibilityMatches the exact same package footprint and the standard SOT-23 pin layout (1: Gate, 2: Source, 3: Drain).Identical standard SOT-23-3 physical package dimension and surface mount mounting style.Meets or exceeds all performance specifications, including 30V Vdss, 4A continuous current, and low 1.3V max Vgs(th).Pin-compatible standard SOT-23 pin assignment (1: G, 2: S, 3: D).Standard SOT-23-3 physical package shape and mounting style.Lacks the 2.5V low-voltage gate drive rating, requiring at least 4.5V for maximum conduction, with a higher Vgs(th) of 2.2V max.
AI Summary

AO3401 by ALPHA & OMEGA SEMICONDUCTOR: Transistor: P-MOSFET; unipolar.

The AO3401A is the direct, active generation upgrade from Alpha & Omega Semiconductor. It is a 100% drop-in replacement that retains low-voltage drive compatibility while offering slightly improved RDS(on).

  • Direct upgraded part from the original manufacturer (Alpha & Omega)
  • Fully drop-in pinout compatible (1: Gate, 2: Source, 3: Drain)
  • Slightly lower RDS(on) of 44mOhm vs 50mOhm for improved efficiency

The AOSS21311C is the official manufacturer-recommended alternative. It features enhanced current handling and gate voltage limits, but requires a higher gate drive voltage, making it unsuitable for 2.5V logic circuits.

  • Official manufacturer recommended substitute part
  • Higher continuous current rating of 4.3A vs 4A for better thermal margin
  • Higher gate voltage rating of ±20V max compared to ±12V on the original
  • Requires higher minimum gate drive of 4.5V (does not support 2.5V drive)
  • Higher threshold voltage Vgs(th) max of 2.2V vs 1.3V on the original
Lifecycle StatusUnknownActiveActive
Market AvailabilityNon-stockIn stockIn stock
REACHUnknownREACHREACH
RoHSRoHSRoHSRoHS
DescriptionTransistor: P-MOSFET; unipolarP-Channel 30 V 4A (Ta) 1.4W (Ta) Surface Mount SOT-23-3P-Channel 30 V 4.3A (Ta) 1.3W (Ta) Surface Mount SOT-23-3
ManufacturerALPHA & OMEGA SEMICONDUCTORAlpha & Omega Semiconductor Inc.Alpha & Omega Semiconductor Inc.
TypeSMD P channel transistorsTransistorsTransistors
DatasheetN/AOpenOpen
Lead Time10 weeks16 weeks16 weeks
Country of Origin---
Export Control Class NumberEAR99EAR99EAR99
HTSUS Code-8541.29.00558541.29.0055
Moisture Sensitivity Level-1 (Unlimited)1 (Unlimited)
Drain-Source Breakdown Voltage--30V-30V
Gate-Source Voltage--12 to 12V20V
Continuous Drain Current--4A @ 25°C; -3.2A @ 70°C-4.3A @ 25°C; -3.3A @ 70°C
Pulsed Drain Current--27A-17A
Power Dissipation-1.4W @ 25°C; 0.9W @ 70°C1.3W @ 25°C; 0.8W @ 70°C
Junction and Storage Temperature Range--55 to 150°C150°C
Thermal Resistance Junction-to-Ambient-100 to 125°C/W125°C/W
Thermal Resistance Junction-to-Lead-63 to 80°C/W80°C/W
Gate Threshold Voltage--1.3 to -0.5V-2.2V
Static Drain-Source On-Resistance-50mΩ @ -10V; 60mΩ @ -4.5V; 85mΩ @ -2.5V45mΩ @ -10V; 65mΩ @ -4.5V
Input Capacitance-645pF720pF
Output Capacitance-80pF80pF
Reverse Transfer Capacitance-55pF70pF
Total Gate Charge-14nC23nC @ 10V; 12nC @ 4.5V
Polarity-P-ChannelP-Channel
Package / Case-SOT-23SOT-23-3

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