Siemens a beamy array of thermal-magnetic circuit breakers that are the fundamental element for overload and short-circuit protection of your home 's physical phenomenon system. To further protection Siemens offers circuit breakers to protect against terrible physical phenomenon shock or electrocution, mitigate the risk of physical phenomenon fires and protect against detrimental surges and Voltage spikes. Circuit breakers are for switching and protection of your home 's wiring from exalted temperatures caused by redundant actual higher than the rating of the wire. While thermal-magnetic circuit breakers are the fundamental element for overload and short-circuit protection of your physical phenomenon system, there potentially unsafe conditions that do not involve over actual. To ensure the warranty on a Siemens panel is not voided, the use of Siemens breakers is. Siemens strongly against the use of `` used '' breakers. The installation of used breakers in a Siemens panel will the warranty on the panel. Siemens does not used breakers and has not approved any third party sellers to do so.