EI35 220V to 10.5V 150mA 50Hz Low Frequency Step Down Isolation Power Transformer This EI35 low-frequency step-down isolation power transformer converts 220V 50Hz mains AC input into stable 10.5V AC output at 150mA. Built with classic EI laminated silicon-steel core and fully separated primary-secondary windings, it delivers complete galvanic isolation for enhanced circuit safety. Compact open-frame PCB pin-mount structure saves cabinet space, perfectly suited for control