onsemi PowerTrench N-Channel MOSFET, 70 A, 40 V, Enhancement Mode, 3-Pin TO-252 Package FDD8445

The onsemi FDD8445 is a PowerTrench N-Channel MOSFET designed for high-performance applications requiring efficient power switching and durability. It supports a maximum continuous drain current of 70 A and a maximum drain-source voltage of 40 V, suitable for demanding electronic circuits in industrial, automotive, and consumer electronics.

Operating in enhancement mode, this MOSFET delivers low drain-source resistance at 16 milliohms, contributing to reduced conduction losses and improved overall system efficiency. It is packaged in a 3-pin TO-252 form factor, allowing for compact and reliable surface mount assembly.

The device accommodates a thermal power dissipation of 79 W and withstands temperatures from -55°C to 175°C, making it ideal for operation in harsh environments. Its typical gate charge of 45 nC at the gate-source voltage ensures swift switching response, while the gate voltage rating of ±20 V protects the device from voltage transients.

Physical dimensions of 6.73 mm length, 6.22 mm width, and 2.39 mm height enable space-saving layout designs. The PowerTrench series is known for its superior heat sinking capabilities, which further extends device reliability under high load conditions.

This MOSFET is widely used in power management circuits, DC-DC converters, motor drives, and other applications requiring efficient and durable semiconductor switches. Compatible with standard surface mount processes, it simplifies integration into various electronic designs.

Enhancement mode operation ensures reliable switching performance. Low maximum drain-source resistance of 16 milliohms improves efficiency. Supports continuous power dissipation of up to 79 W for robust thermal handling.

Wide operating temperature range from -55°C to 175°C for industrial applications. Typical gate charge of 45 nC at Vgs enhances fast switching capabilities. Maximum gate-source voltage tolerance of ±20 V protects against voltage spikes.

Compact physical size optimizes PCB space usage. Surface mount TO-252 package facilitates assembly.

Available within the onsemi PowerTrench MOSFET product family, the FDD8445 offers a balanced combination of current handling, voltage rating, and low resistance for a wide range of electrical and electronic engineering applications. Browse our Electronics & Electricals section for more onsemi semiconductor components and related products.