IRF840 N-Channel Power Mosfet Transistor 8A 500V 0.85Ω TO-220

Description

IRF840 N-Channel Power Mosfet Transistor 8A 500V 0.85Ω TO-220 The IRF840 is an N-Channel Power MOSFET which can switch loads upto 500V. The Mosfet could switch loads that consume upto 8A, it can turned on by providing a gate threshold voltage of 10V across the Gate and Source pin. Pin Configuration Pin Number Pin Name Description 1 Source Current flows out through Source (maximum 8A) 2 Gate Controls the biasing of the MOSFET (Threshold voltage 10V) 3 Drain Current flows in through Drain Features · N-Channel Power MOSFET · Continuous Drain Current (ID): 8A · Gate threshold voltage (VGS-th) is 10V (limit = ±20V) · Drain to Source Breakdown Voltage: 500V · Drain Source Resistance (RDS) is 0.85 Ohms · Rise time and fall time is 23nS and 20nS · Available in To-220 package Note: Complete technical details can be found at the IRF840 datasheet linked at the bottom of the page Alternatives for IRF840 8N50, FTK480, KF12N50 Other N-channel MOSFETS IRF740 , BSS138, IRF520, 2N7002, BS170, BSS123, IRF3205, IRF1010E About IRF840 The IRF840 is an N-Channel Power MOSFET which can switch loads upto 500V. The Mosfet could switch loads that consume upto 8A, it can turned on by providing a gate threshold voltage of 10V across the Gate and Source pin. Since the mosfet is for switching high current high voltage loads it has a relatively high gate voltage, hence cannot be used directly with a I/O pin of a CPU. If you prefer a mosfet with low gate voltage then try IRF540N or 2N7002 etc. One considerable disadvantage of the IRF840 Mosfet is its high on-resistance (RDS) value which is about 0.85 ohms. Hence this mosfet cannot be used in applications where high switching efficiency is required. The Mosfet requires a driver circuit to provide 10V to the gate pin of this Mosfet the simplest driver circuit can be build using a transistor. It is relatively cheap and has very low thermal resistance, added to this the mosfet also has good switching speeds and hence can be used in DC-DC converter circuits. Applications Switching high power devices Inverter Circuits DC-DC Converters Control speed of motors LED dimmers or flashers High Speed switching applications 2D model of the component If you are designing a PCB or Perf board with this component then the following picture from the IRF840 Datasheet will be useful to know its package type and dimensions. Component Datasheet IRF840 Datasheet

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