The Square D PowerPacT BDA36040 is a high-quality 40 amp, 3 pole, 480V circuit breaker suitable for interior use. With an I-Line mounting style and an on/off operation method, this main breaker from Square D offers instantaneous break time and is designed for AC current type. Featuring a switch control style and compatibility with HomePlug smart home protocol, this circuit breaker provides reliable protection for electrical circuits in both residential and industrial settings. With its durable construction and trusted brand reputation, the Square D PowerPacT BDA36040 is a top choice for circuit breaker solutions.