Miniature Circuit Breakers

Sigma Miniature Circuit Breakers (MCB) are manufactured in Türkiye with short-circuit breaking capacities of 4.5kA, 6kA, 10kA, and 15kA, in compliance with TS 5018-1 EN 60898-1 and IEC 60947-2 standards as well as CE norms.

Thanks to a wide range of accessories based on demand, motor operating mechanisms, shunt trips, auxiliary contacts, and undervoltage releases can be added to Sigma Miniature Circuit Breakers when needed.

3 Main Functions of Miniature Circuit Breakers:

Protection against overload currents
Protection against short-circuit currents
Opening and closing the circuit / Circuit switching

Available in 1, 2, 3 and 4-pole configurations

Manufactured in compliance with TS 5018-1, EN 60898-1, and IEC 60947-2 standards, as well as CE directives, featuring short-circuit breaking capacities of 4.5 kA, 6 kA, 10 kA, and 15 kA

Wide product range offering rated currents from 1 A to 125 A

Product variety featuring B, C, and D tripping curve options tailored to the protected load characteristics

Design optimized for high electrical and mechanical endurance

Housing and cover material resistant up to 960 °C