![IRF 640](https://abouelzahab.com/710-large_default/irf-640.jpg)
![IRF 640](https://abouelzahab.com/710-large_default/irf-640.jpg)
The IRF640 is an N Channel MOSFET designed for high-speed switching purposes.
This high-speed switching capability can be very useful in applications where switching speed is crucial, for example in a UPS circuit or in any other application where the user wants to change the load input power from one source to another