Our best selling Siemens Betagard 5SL416 A MCB available online at Eleczo, More different poles Siemens 16 amp MCB is typically used to protect electrical circuits and devices with a maximum current requirement of up to 16 amps, Siemens 16A MCBs are commonly used to protect lighting circuits in residential and protect small power circuits in homes and offices, including socket outlets and appliances with lower current requirements, such as computers, printers, and televisions.