Under no condition, the gate to source voltage should be more than 18 V and the no-input drain to source voltage should be more than 60V. The table above shows the absolute maximum ratings for 2N7000 (TO-92 package) and 2N7002 (SOT23-3L), respectively.
Otherwise, the device may fail due to overheating or may get permanently damaged. Make sure to operate the device within its absolute maximum limit. Current flows from drain to source and electrons flow in the opposite direction. Make sure to connect Source and Gate to the negative terminal and positive terminal of the battery respectively.
With the flat part facing up, you will find the source to the left, the gate to the middle and the drain to the right. In case of logic level MOSFETs, this value typically stays in milliohms. The 2N7000 offers lowest resistance path when the gate to source voltage is 10 V, and offers a typical 2 resistance at the minimum threshold voltage of 4.5 V.Īs this is a power MOSFET, the resistance value is high in order to handle large loads. If we take a look at the ON characteristics of the 2N7000 MOSFET, we get the following information.Īs we can see, R DS(ON) is given for different voltage sources. The output current is the multiplier of the input. But as we increase the V GS, the output resistance starts to drop very quickly. Thus, initially, when V GS =0, the MOSFET acts as an open switch. In short, MOSFETs are variable resistors controlled by voltage. If the voltage is low, the resistance is high and vice versa. Depending on the voltage applied between the gate and source (V GS), the resistance between the drain and source (R DS(ON)) will vary. When voltage is applied between the drain and source, current flows from the drain to source. As the name suggests, a field effect transistor works by voltage. It’s an N-channel enhancement MOSFET (metal oxide field effect transistor). Understanding Basic Operation of 2N7000 MOSFET Before we look at 2N7000 circuit applications, let’s learn some of the essentials for this component. The 2N7000 is an N-channel enhancement MOSFET.
The former type is, by far, the most common transistor used today. It further comes in N-channel and P-channel types. The depletion type acts as a normally closed switch, whereas the enhancement type acts as a variable resistor controlled by voltage. The MOSFET has two types: enhancement type and depletion type. Usually, BJT transistors are used for small current applications, whereas MOSFETs are reliable for high current applications.
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