Mornsun k78 500r2 500ma sip switching regulators mornsun k7809 500r2 this dc regulator from mornsun has high efficiency and is an ideal substitute of 78xx series linear regulators while pin compatible equipped with low ripple and noise short circuit protection and an operating temperature range of 40degc to 85degc the regulator is widely used in industrial control instrumentation and electric power applications mornsun k7809 500r2 500ma sip switching regulator 9v dc