Which MOSFET is best for a sstc in the circuit given? If the input voltage is 140-220v. And is the diode(MUR1560) near the MOSFET(D4 & D5) necessary? Is there any way to exclude that?, By using any other MOSFET?Any MOSFETs with in build diode, so that i wouldn't have to put an external diode? or could a simple in4007 work in place of it? Any other diodes which are more easy to obtain?