What is a MOSFET?

A MOSFET is a voltage-controlled power semiconductor device that regulates current flow through an electric field established by an insulated gate structure. Conduction occurs when the applied gate–source voltage induces a conductive channel between the drain and source terminals, allowing precise control of current with minimal steady-state gate drive power.

MOSFETs are fundamental components in power conversion, motor control, and switching applications due to their fast switching capability and scalable current handling. Device performance is determined by channel structure, breakdown capability, and on-state resistance, all of which directly influence efficiency, switching losses, and thermal behavior in power electronic systems.

Key Specifications

• Type: Defines the functional classification of the MOSFET, indicating its intended operating mode and switching characteristics.
• Technology: Identifies the semiconductor process and structural implementation, which affects switching speed, efficiency, and robustness.
• Polarity: Indicates whether the device is n-channel or p-channel, determining current flow direction and gate drive requirements.
• Number of Channels: Specifies how many conductive channels are integrated within the device, influencing current capability and integration level.
• Continuous Drain Current: Represents the maximum drain current the device can conduct continuously under defined thermal conditions.
• Drain Source Breakdown Voltage: Defines the maximum voltage the MOSFET can block between drain and source when in the off-state.
• Drain Source Resistance: Represents the on-state resistance of the device, directly impacting conduction losses and heat generation.
• Gate Source Voltage: Specifies the allowable voltage applied between the gate and source terminals, which is critical for safe operation and gate drive design.

The Largest Database of MOSFET

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