ONSEMI FDD4243 P-Channel MOSFET 40V 14A 0.044Ω DPAK

The ONSEMI FDD4243 is a high-performance P-channel power MOSFET, engineered using advanced PowerTrench® technology. This design delivers a very low drain-source on-state resistance (RDS(ON)) and optimised breakdown voltage capability, resulting in superior efficiency and thermal performance for demanding power management applications. It is ideal for use in switching power supplies, motor control circuits, and battery protection systems where minimal power loss and high reliability are critical.

This surface-mount component features a robust TO-252 (DPAK) package, offering an excellent balance of power handling and board space efficiency. The extremely low RDS(ON) of just 0.044 ohms significantly reduces conduction losses, improving overall system efficiency and allowing for cooler operation. With a continuous drain current rating of 14A and a drain-source voltage of 40V, it provides ample headroom for a wide range of medium-power applications.

Key Specifications & Features

• Technology: Advanced PowerTrench® process for high performance.
• Channel Type: P-Channel enhancement mode.
• Drain-Source Voltage (Vds): 40 Volts.
• Continuous Drain Current (Id): 14 Amps.
• Drain-Source On-State Resistance (RDS(ON)): 0.044 Ohms (tested at Vgs=20V).
• Gate-Source Threshold Voltage (Max): 1.6 Volts.
• Maximum Power Dissipation: 42 Watts.
• Package: TO-252 (DPAK), 3-pin, surface mount.
• Maximum Operating Temperature: +150°C.
• Moisture Sensitivity Level (MSL): MSL 1 - Unlimited, offering excellent shelf life and ease of handling.

The combination of low threshold voltage and high current capability makes the FDD4243 an excellent choice for load switching, power distribution, and DC-DC converter designs. Its industry-standard DPAK footprint ensures compatibility with existing PCB layouts and automated assembly processes, suIt