INFINEON IRLB8743PBF N-Channel Power MOSFET 30V 40A TO-220AB

The INFINEON IRLB8743PBF is a high-performance, N-Channel HEXFET® Power MOSFET designed for demanding power management applications. It utilises advanced Trench MOSFET technology to deliver an extremely low on-resistance per silicon area, ensuring high efficiency and minimal power loss in operation. This device is engineered for fast switching performance, making it an excellent choice for modern, high-frequency power conversion circuits.

A key specification is its very low drain-source on-state resistance (RDS(ON)) at a gate-source voltage of 4.5V, paired with an ultra-low gate impedance for efficient drive control. The MOSFET's electrical characteristics, including capacitance and avalanche ratings, are fully characterised, providing reliable performance data for robust system design. With a continuous drain current rating of 40A and a power dissipation capability of 140W, it is built to handle significant power loads.

Primary Applications

This MOSFET is optimised for a range of critical applications. It is particularly suitable for high-frequency synchronous buck converters used in computer processor power supplies, as well as for uninterruptible power supply (UPS) and inverter systems. Its performance also makes it ideal for high-frequency, isolated DC-DC converters with synchronous rectification in telecommunications and industrial equipment, where reliability and efficiency are paramount.

Housed in a standard TO-220AB package with through-hole mounting, it offers a familiar and robust physical form factor for easy integration into a wide array of circuit boards and heatsink assemblies. The device is rated for operation at temperatures up to 175°C, ensuring stability in demanding thermal environments.

Key Specifications

• Channel Type: N-Channel
• Drain-Source Voltage (Vds): 30 V
• Continuous Drain Current (Id): 40 A
• **Drain-Source On-State Resist.