Siemens offers a wide array of thermal-magnetic circuit breakers that are the key element for overload and short-circuit protection of your home™s electrical system. To provide additional protection Siemens offers circuit breakers to protect against severe electrical shock or electrocution, mitigate the risk of electrical fires and protect against damaging surges and Voltage spikes. Circuit breakers are intended for switching and protection of your homes wiring from high temperatures caused by excess current higher than the rating of the wire. While thermal-magnetic circuit breakers are the key element for overload and short-circuit protection of your electrical system, there are potentially dangerous conditions that do not involve over current. Also known as -2 Pole: Siemens Electrical Supplies 80 Amp 2-Pole Breaker Q280-Siemens 156170 Circuit Breaker80A2P240V-SIEMENS Q280 Ckt Breaker, Standard, 2P, 80A, 120/240VAC-CIRCUIT BREAKER,80A,2P,240V per EA-Siemens Q280 Circuit Breaker 80 Amp 120/240 Volt AC 2-Pole Plug-In Mount