The 5SY6406-6 is a four-pole, DIN-rail mounted, differential circuit breaker from Siemens, rated for 230/400VAC, with a rated current of 6A and a breaking capacity of 6kA. It has a B characteristic, which provides short circuit protection with overcurrent, overload, and short circuit protection. The circuit breaker has a modular design, allowing for easy installation and future maintenance, and has protective insulation and insulation protection. It is suitable for most applications, including domestic, commercial, and industrial installations.