UMW AO3401A P-MOSFET, 30V 4.2A, SOT23

Product detailed description

The UMW AO3401A P-channel MOSFET in a SOT-23 package is a universal switching transistor for voltages up to 30 V and currents up to 4.2 A. It is typically used as a high-side switch – for disconnecting power to modules, sensors, or LEDs, as reverse polarity protection, or for switching between battery and USB power. Thanks to its low threshold voltage (max. −1.3 V), it switches reliably at a gate voltage of −2.5 V, making it compatible with 3.3V logic. If you are switching a higher voltage than the microcontroller supply, drive the gate via an NPN transistor or N-MOSFET (e.g. AO3400A). The AO3401A is one of the most common small P-MOSFETs in an SOT-23 SMD package and is interchangeable with AO3401/AO3401A types from other manufacturers.

Specifications:

• Type: P-channel MOSFET (enhancement mode, trench technology)
• Package: SOT-23 (SMD)
• Pinout: 1 – G (gate), 2 – S (source), 3 – D (drain)
• Drain-source voltage VDS: max. −30 V
• Gate–source voltage VGS: max. ±12 V
• Drain current ID:
  • Continuous: −4.2 A (TA = 25 °C), −3.5 A (TA = 70 °C)
  • Pulsed IDM: −30 A
• Threshold voltage VGS(th): −0.4 to −1.3 V
• On-state resistance RDS(on):
  • VGS = −10 V: max. 50 mΩ
  • VGS = −4.5 V: max. 65 mΩ
  • VGS = −2.5 V: max. 120 mΩ
• Gate capacitance and charge:
  • Input capacitance Ciss: typ. 954 pF
  • Total gate charge Qg: typ. 9.4 nC (VGS = −4.5 V)
• Power dissipation PD: max. 1.4 W (TA = 25 °C), 1 W (TA = 70 °C)
• Thermal resistance junction-to-ambient RθJA: 125 °C/W
• Operating junction temperature: −55 °C to +150 °C
• Manufacturer: UMW (Youtai Semiconductor)
• Complementary N-channel type:
  • UMW AO3400A N-MOSFET, 30V 5.8A, SOT23

Package contents:

• 1× P-MOSFET UMW AO3401A, SOT-23

Note:

• When switching inductive loads (motors, relays, solenoids), connect a protective (flyback) diode in parallel with the load.
• This product is not a standalone functional unit and may require professional installation.
• Product images are for illustrative purposes only and may sometimes differ from the actual appearance of the item. However, this does not change their basic properties.