MOS tube can fill the gap for power required by some hot beds over the top of what a standard RAMPS can provide. It can work with open 3D printer like Anet A8.
The high current of the hotbed brings multiple problems to your mainboard. Removing the hot bed current from the mainboard by this MOS tube, significantly reduces stress on your mainboard (connectors), which will prolong life of mainboard.
Another benefit, it will allow you to use a second PSU for bed power (12 or 24 volts).
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