Upgrade the safety and reliability of your electrical system with the Square D 40 Amp Single-Pole Circuit Breaker. Engineered for both residential and commercial applications, this robust breaker features a durable black casing and a compact design to fit easily into most electrical panels. With its impressive 10 KA interrupting rating and compatibility with 120/240V systems, you can trust it to deliver consistent circuit protection against overloads and short circuits. Ideal for new installations or replacements, it offers peace of mind and trusted performance from a top brand. Dimensions and technical specifications are available upon request. Square D Plug In Circuit Breaker, QO, Number of Poles 2, 40 Amps, 120/240VAC, Standard - QO240.