Power MOSFETs control the flow of electrical power in converters, motor drives, power supplies, inverters, chargers, and many other electronic systems. However, MOSFETs with similar current or voltage ratings can perform very differently because of their on-resistance, gate requirements, switching speed, package, thermal limits, and semiconductor technology. This article examines ten common power MOSFETs, ranging from low-voltage silicon devices to high-voltage superjunction and silicon-carbide models.

Catalog

IRF3205

The IRLZ44N is an N-channel, logic-level power MOSFET originally developed by International Rectifier and now supplied by Infineon Technologies. It uses fifth-generation HEXFET technology to provide low on-state resistance, fast switching, dynamic dv/dtcapability, and strong avalanche performance.

The device has a maximum drain-to-source voltage of 55 V and a continuous drain-current rating of up to 47 A at a controlled case temperature. Its maximum on-resistance is 22 mΩ with a 10 V gate signal and 35 mΩ at 4.5 V.

The IRLZ44N comes in a three-pin TO-220 package with gate, drain, and source terminals. Its logic-level gate allows effective control from approximately 4.5–5 V signals. However, reliable operation directly from 3.3 V is not guaranteed. The maximum junction temperature is 175°C.

Specifications

IRF540N

The IRF540N is an N-channel power MOSFET designed for controlling medium-voltage and high-current loads. It has a 100 V drain-to-source rating, a continuous drain-current rating of up to 33 A, and an on-resistance of approximately 40–44 mΩ, depending on the manufacturer.

This MOSFET provides fast switching, low on-resistance, avalanche capability, and a maximum junction temperature of 175°C. The device comes in a TO-220AB package, which allows straightforward heatsink mounting. It requires approximately 10 V at the gate for low-resistance operation and is not a logic-level MOSFET.

The STP55NF06 is a 60 V N-channel power MOSFET manufactured by STMicroelectronics using STripFET II technology. It supports a continuous drain current of up to 50 A and has a maximum on-state resistance of approximately 15 mΩ under the specified test conditions.

Its main features include fast switching, exceptional dv/dt capability, low gate charge, low input capacitance, and 100% avalanche testing. The device comes in a three-pin TO-220 package with gate, drain, and source terminals. Its metal tab is electrically connected to the drain.

The STP55NF06 offers low conduction loss, strong switching performance, and good thermal transfer when attached to a suitable heatsink. It is commonly used in DC–DC converters, switching power supplies, motor-control circuits, battery-powered systems, and other general power-switching stages. A suitable gate driver and proper cooling are required to achieve reliable performance at high current.

Specifications

CSD19536KCS

The NTMFS5C628NL is a single N-channel power MOSFET manufactured by onsemi. It has a 60 V drain-to-source rating, a continuous drain-current rating of up to 150 A under specified thermal conditions, and a maximum on-state resistance of 2.4 mΩ.

The device comes in a compact 5 × 6 mm surface-mount package. Its low on-resistance reduces conduction losses, while its low gate charge and capacitance help reduce gate-driver losses during switching. It supports a maximum junction temperature of 175°C and is lead-free and RoHS compliant.

The NTMFS5C628NL provides high current capability, efficient switching, and reduced PCB-space requirements. It is suitable for high-performance DC–DC converters, synchronous rectifiers, motor drives, point-of-load power modules, server power systems, and power tools. Practical current capability depends on the PCB copper area, switching conditions, airflow, and thermal management.

Specifications

IPW60R041P6

The  STW40N65M2 is a 650 V N-channel power MOSFET manufactured by STMicroelectronics. It uses MDmesh M2 technology with an improved vertical structure and strip layout. The device supports a continuous drain current of 32 A and has a typical on-resistance of 87 mΩ, with a maximum of 99 mΩ.

Its main features include extremely low gate charge, an optimized output-capacitance profile, built-in Zener gate protection, and 100% avalanche testing. It comes in a three-pin TO-247 package that provides good heat transfer when properly attached to a heatsink.

The STW40N65M2 offers low conduction loss, efficient switching, strong voltage capability, and reliable operation under demanding switching conditions. It is suitable for high-efficiency converters, switching power supplies, power-factor-correction stages, inverters, and other high-voltage switching circuits.

Specifications

IMW120R045M1

The C3M0075120D is a 1,200 V N-channel silicon-carbide power MOSFET manufactured by Wolfspeed. It uses third-generation C3M SiC technology and provides an on-state resistance of approximately 75 mΩ. The device comes in a three-pin TO-247 package and operates across a −55°C to +150°C junction-temperature range.

Its main features include high blocking voltage, low on-resistance, low capacitance, fast switching, and a high-speed intrinsic body diode with low reverse-recovery charge. It is also halogen-free and RoHS compliant.

The C3M0075120D can increase conversion efficiency, support higher switching frequencies, improve power density, and reduce cooling requirements. It is commonly used in renewable-energy systems, EV battery chargers, high-voltage DC–DC converters, switched-mode power supplies, industrial motor drives, and energy-storage equipment. A suitable SiC gate driver, low-inductance PCB layout, and effective thermal management are required for reliable operation.

Specifications