Circuit breaker FAZ-B6/1, 15kA series (1-pole) 278529

Short-circuit and overload protection in single-phase installations

The FAZ-B6/1 circuit breaker provides effective protection for 230 V single-phase circuits in both residential and industrial installations. It functions as a protective device against the effects of short circuits and overloads—its characteristic B allows tripping at currents 3 to 5 times the rated current, making it well-suited to withstand short-term current peaks typical of household devices, such as LED lighting, chargers, or small motors.

15 kA breaking capacity—safe disconnection even under high short-circuit currents

In the event of short circuits, where current may reach values close to 15 kA (according to IEC 60947-2), the circuit breaker not only trips but also safely disconnects the circuit—without risk of contact welding or explosion. This capability is crucial in installations with short cables or transformers located nearby, where short-circuit currents are high. It is worth noting that at 400 V (e.g., in three-phase systems), its breaking capacity also remains 15 kA—meaning it can be used in distribution systems without the need to change the device type.

DIN rail mounting and flexible connection

Mounted on a 35 mm DIN rail, it occupies only one module (17.5 mm width), enabling compact organization of distribution boards. The terminals are crimped and accept single-core and multi-core cables with a cross-section from 1 to 25 mm²—covering most typical cables used in residential and distribution installations. The possibility of connecting the supply from either the top or the bottom facilitates installation in existing systems without the need to modify the rail.

Status indicator and environmental resistance

The red-green contact position indicator allows quick assessment of the circuit breaker's status—whether it is ON or tripped—without opening the enclosure. The IP20 degree of protection provides basic protection against finger contact and the presence of dust—sufficient for indoor distribution boards. The device operates over a wide temperature range: from -25°C to +75°C, ensuring functionality even in unheated rooms or under high heating conditions within distribution boards.

Energy limiting class 3—reduced stress on the installation

Energy limiting class 3 means that the circuit breaker limits the amount of energy flowing through the circuit during a short circuit—reducing the risk of damage to cables and other installation components. This is particularly important for long lines or when using cables with smaller cross-sections. Additionally, overvoltage category III and pollution degree 2 confirm its suitability for use in typical construction environments.

Compatibility and expandability

The possibility of additional accessories (e.g., mechanical locks, auxiliary contacts) enables integration with control or signaling systems. The circuit breaker complies with standards IEC/EN 60947-2 and EN 60898-1—guaranteeing conformity with European safety requirements for protective devices.