When a gate voltage is applied these pins gets closed. IRFZ44N is an N-channel MOSFET, so the Drain and Source pins will be left open when there is no voltage applied to the gate pin.

Meaning, they can be turned on or turned off by supplying the required Gate threshold voltage (VGS). Unlike transistors MOSFET’s are voltage controlled devices. However it does turn on partially with direct 5V form a I/O pin, but the output drain current will be limited. The IRFZ44N on the other hand requires a gate driver circuit if the MOSFET has to be turned on completely using a microcontroller like Arduino. The IRLZ44N is a Logic level Mosfet with a very low gate threshold voltage of 5V, meaning the MOSFET can be fully turned on with just 5V on its gate pin which avoids the need for a driver circuit. The IRLZ44N and IRFZ44N MOSFETs are often confused among each other and used incorrectly. If the mosfet has to be driven directly from a microcontroller like Arduino then try the logic level version IRLZ44N mosfet.ĭifference between IRLZ44N and IRFZ44N Mosfet The MOSFET will start turning on with a small gate voltage of 4V, but the drain current will be maximum only when a gate voltage of 10V is applied. Adding to that it also has a low Rds value which will help in increasing the efficiency of switching circuits. The IRFZ44N is known for its high drain current and fast switching speed. Note: Complete Technical Details can be found in the IRFZ44N datasheet given at the end of this page. It is commonly used with Arduino, due to its low threshold current.Rise time and fall time is about 60ns and 45ns respectively.Maximum Drain-Source Voltage (VDS) is 55V.Gate-Source Voltage is (VGS) is ☒0V (max).Maximum Gate threshold voltage (VGS-th) is 4V.Minimum Gate threshold voltage (VGS-th) is 2V.Continuous Drain Current (ID) is 49A at 25☌.However a driver circuit is needed if the MOSFET has to be switched in completely. Hence it is commonly used with microcontrollers to drive with 5V. It also has a low threshold voltage of 4V at which the MOSFET will start conducting. The IRFZ44N is a N-channel MOSFET with a high drain current of 49A and low Rds value of 17.5 mΩ.

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