Mornsun k78 2000 2a sip switching regulators mornsun k78x2 2000 this dc regulator from mornsun has high efficiency and is an ideal substitute of 78 series three terminal linear regulators equipped with low loss low radiation and no heat sink requirement the regulator is widely used in industrial control instrumentation and electric power applications mornsun k78x2 2000 2a sip switching regulator 18v dc