Siemens Breaker 30A 2P 120/240V 10K QP Circuit breakers are intended for switching and protection of your home's 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 overcurrent. This is a genuine Siemens OEM product and is not a refurbished or counterfeit unit. Don't compromise your safety by installing an inexpensive counterfeit product. 3.00 L. 2.88 W. 1.88 H.