HA210N06 - 210A 60V N-Channel MOSFET - datasheet
MB6S - Bridge Rectifier - it corrects reverse polarity to MOSFET gate - so you don't burn it. With this on the board you can connect the wire without worrying about polarity. - datasheet
EL 817 C915 - PHOTOCOUPLER - datasheet
The way it should be used it is like this:
Voltage limits of the circuit
On the drive signal - the limiting factor is the optocoupler max forward current of 60ma. We have a 10k resistor so a maximum of 600v - that also coresponds to the bridge rectifier max voltage. So we have no maximum real limit but we have a problem with the minimum voltage.
The optocoupler support maximum 35v on the output side collector-emitter. The MOSFET takes 25v on the gate-source side, and it has a voltage divider of 50% so it takes a max of 50v DC IN but we have the 35v limit on the optocoupler. So 35v is maximum DC IN.
optocoupler input is connected through a 103 resistor - 10k - after it passes through the bridge rectifier first.
If you are using a microcontroller with 3.3v logic voltage it will not open. You need to replace the 10k with 1k 102 resistor.
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