Transistor Selection Assistance

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Here are the top matches for a ≥2 A switching transistor from the Flux library:

Table

ComponentTypeVBRIC/DPackageDatasheet
2SA1020RLRAGPNP BJT50 V2 ATO-92Datasheet
AO3401AP-Channel MOSFET30 V4.2 ASOT-23Datasheet
RUR020N02TLN-Channel MOSFET20 V2 ATSMT3Datasheet
Recommendations:
  • [RUR020N02TL] is a logic-level N-channel MOSFET in a tiny surface-mount TSMT3 package, ideal for low-side switching of up to 2 A.
  • [AO3401A] offers extra current margin (4.2 A) but is P-channel, suitable for high-side switching in 3.3 V/5 V systems.
  • [2SA1020RLRAG] is a PNP BJT in TO-92, good for simple low-side switching if you don’t need MOSFET-level RDS(on).
Which topology fits your design—low-side (NPN/MOSFET) or high-side (PNP/P-MOSFET)? Or do you have a preference for BJT vs. MOSFET? Let me know, and I can add the chosen component to your schematic.
Select low-side MOSFET
Select high-side MOSFET
Select PNP BJT
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