AO4294

Overview

The AO4294 is an N-channel power MOSFET manufactured by Alpha & Omega Semiconductor Inc. It features a drain-source voltage (Vdss) of 100 V and a continuous drain current (Id) of 11.5 A at ambient temperature. The device utilizes an 8-SOIC surface-mount package. Key electrical parameters include a maximum on-resistance (Rds(on)) of 12 mΩ at 10 V gate drive, a threshold voltage (Vgs(th)) of 2.4 V max at 250 µA, and a maximum gate charge (Qg) of 50 nC at 10 V. Input capacitance is specified as 2420 pF at 50 V. The component operates within a junction temperature range of -55°C to 150°C and has a maximum power dissipation of 3.1 W at ambient conditions.

Feature Summary

• N-channel enhancement mode metal-oxide semiconductor field-effect transistor
• Logic-level compatible gate drive with low threshold voltage for efficient control
• Low on-resistance characteristic to minimize conduction losses in high-current applications
• Surface-mount construction in an 8-pin small outline integrated circuit package

Applications

• DC motor driver circuits
• Power switching applications requiring medium voltage isolation
• Load switch implementations in consumer electronics
• General-purpose power management systems

Procurement Notes

Verify the specific ordering suffix to confirm packaging type, such as tape and reel quantities versus cut tape options. Confirm RoHS compliance status and lead times directly with authorized distributors or the manufacturer. Ensure the procurement channel provides valid traceability documentation. Check for any recent product change notices that may affect pinout or material composition before finalizing supply agreements.

Selection Notes

Select this component for designs requiring a 100 V breakdown voltage with moderate current handling capabilities. The low gate charge facilitates higher switching frequencies while maintaining manageable drive requirements. Evaluate thermal performance carefully as the power dissipation rating is limited in free-air conditions without adequate PCB copper area. Ensure the operating voltage and current stresses remain within the safe operating area defined in the official datasheet.

Part Context

This part belongs to the Alpha & Omega Semiconductor discrete semiconductor portfolio, specifically within the single FET MOSFET category. It is designed for general-purpose power switching tasks where efficiency and compact footprint are priorities. The 8-SOIC package allows for automated assembly processes. The device represents a standard solution for mid-range voltage applications in industrial and consumer markets.

Replacement Considerations

Check for direct pin-compatible alternatives from other manufacturers offering similar 100 V N-channel specifications. Verify that substitute parts meet or exceed the required Rds(on), Qg, and thermal performance metrics. Ensure the replacement package matches the 8-SOIC footprint dimensions exactly to avoid board redesign.