Circuit breaker GACIA SB6L B 3P 50A, 6 kA short-circuit, B curve, 3-pole, 50 A

GACIA SB6L B 3P 50A is a three-pole miniature circuit breaker designed to provide overcurrent and short-circuit protection for three-phase installations. With a rated current of 50 A and a B trip characteristic, this device responds quickly to moderate overcurrents while allowing temporary inrush currents typical for lighting and motor startup. The breaker offers a breaking capacity of 6 kA and is intended for panel mounting in residential and light-commercial electrical distribution boards to protect wiring, loads and connected equipment from overloads and faults.

Advantages

The device combines a compact three-pole design with a B curve tripping characteristic, making it suitable for circuits with predominantly resistive or low-inrush loads. The 6 kA breaking capacity ensures reliable interruption of short-circuit currents within its rated limits. Its construction allows standardized DIN-rail or panel installation, simplifying integration into common distribution boards. The breaker provides consistent thermal-magnetic protection and clear manual switching for maintenance and circuit isolation.

Suitable for

• Protection of three-phase circuits in homes, flats and small commercial premises
• Overload and short-circuit protection for lighting circuits and resistive loads
• Distribution board installations where space-efficient three-pole protection is required

Key specifications

• Poles: 3-pole
• Rated current: 50 A
• Tripping curve: B (thermal-magnetic)
• Breaking capacity: 6 kA
• Mounting: panel / DIN-rail compatible distribution board installation
• Application: three-phase circuit protection for residential and light-commercial use

How to use

Install the circuit breaker in a suitable distribution board following local electrical codes and the panel manufacturer's instructions. Ensure the device is mounted on the appropriate rail or panel space and that incoming and outgoing conductors are correctly connected to the corresponding terminals for each phase. Verify the tightness of terminal connections and that the rated current and tripping characteristic match the circuit requirements. After installation, energize the circuit and confirm the breaker operates correctly by observing the manual switch position and testing under controlled conditions if required.

Usage recommendations

Choose this B curve, 50 A three-pole breaker when protecting three-phase circuits with predominantly resistive or low-inrush loads. For circuits with motors, large inductive loads or where higher fault currents are possible, review coordination with upstream protection and consider alternative tripping characteristics or higher breaking capacity as appropriate. Regularly inspect connections and confirm correct operation during scheduled maintenance.