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Product Detailed Parameters
- Description：MOSFET N-CH 40V 24A 8SOIC
- Series：-
- Mfr：Alpha & Omega Semiconductor Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- FET Type：N-Channel
- Technology：MOSFET (Metal Oxide)
- Drain to Source Voltage (Vdss)：40 V
- Current - Continuous Drain (Id) @ 25°C：24A (Ta)
- Drive Voltage (Max Rds On, Min Rds On)：4.5V, 10V
- Rds On (Max) @ Id, Vgs：3.3mOhm @ 20A, 10V
- Vgs(th) (Max) @ Id：2.3V @ 250µA
- Gate Charge (Qg) (Max) @ Vgs：87 nC @ 10 V
- Vgs (Max)：±20V
- Input Capacitance (Ciss) (Max) @ Vds：4245 pF @ 20 V
- FET Feature：-
- Power Dissipation (Max)：3.1W (Ta)
- Operating Temperature：-55°C ~ 150°C (TJ)
- Grade：-
- Qualification：-
- Mounting Type：Surface Mount
- Supplier Device Package：8-SOIC
- Package / Case：8-SOIC (0.154", 3.90mm Width)
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Overview
The AO4240 is a single N-channel MOSFET from Alpha & Omega Semiconductor, housed in an 8-SOIC surface-mount package. It features a 40V drain-source voltage rating and supports a continuous drain current of 24A at 25°C ambient temperature. The device offers a maximum on-resistance of 3.3 milliohms when driven at 10V with a 20A load. Key electrical characteristics include a gate charge of 87nC at 10V and an input capacitance of 4245pF at 20V. It operates within a junction temperature range of -55°C to 150°C.
Feature Summary
- Single N-channel configuration for efficient switching applications
- Low on-resistance optimized for high-current power management
- Logic-level gate drive compatibility for direct microcontroller interfacing
- Robust thermal performance suitable for compact surface-mount designs
Applications
- DC-DC converter output stages
- Load switching circuits
- Power management modules
- Motor control interfaces
Procurement Notes
Verify the specific manufacturer part number against official Alpha & Omega Semiconductor documentation to confirm pinout and electrical specifications. Ensure the component meets RoHS3 compliance requirements if mandated by your design standards. Cross-reference datasheet revisions to validate any recent parameter updates or manufacturing changes before finalizing procurement orders.
Selection Notes
Select this component for applications requiring moderate voltage blocking with high current handling capabilities in a small footprint. Evaluate the thermal dissipation constraints carefully, as the 8-SOIC package has limited heat spreading compared to larger packages. Confirm that the gate drive voltage aligns with the specified thresholds to ensure optimal on-state resistance and switching efficiency.
Part Context
This device belongs to the AO42 series of N-channel MOSFETs designed for general-purpose power switching. It utilizes advanced MOS process technology to achieve low on-resistance and fast switching speeds. The 8-SOIC package provides a balance between current capacity and board space efficiency, making it suitable for dense consumer and industrial electronics layouts.
Replacement Considerations
The SI4122DY-T1-GE3 from Vishay Siliconix is documented as a similar alternative. Verify pin compatibility and electrical parameters against the original datasheet before substitution.
