Curve C can tolerate short-term overcurrents of up to five to ten times the rated current and is widely used in domestic systems.

A circuit breaker is a safety device that can automatically (i.e., without external intervention) interrupt the flow of electric current in an electrical circuit in the event of an overcurrent.

The MCB Series 90 meets any requirement for overload and short-circuit protection, for all civil, tertiary and industrial applications. The range consists of MTC, compact circuit breakers (2 to 32A, curves B and C up to 10kA) MT traditional circuit breakers (1 to 63A, curves B, C and D up to 25kA) MTHP high performance circuit breakers (20 to 125A, curves C and D up to 25kA).

Features:

• Rated frequency: 50/60 Hz
• Interrupting capacity (Ics): 0.75 x Icn
• Interrupting capacity 230V (Icu): 20 kA
• Interrupting capacity 400V (Icu): 16 kA
• Interrupting capacity (Ics): 50% Icu
• Insulation voltage: 500V
• Rated impulse withstand voltage: 6 kV
• Minimum operating voltage: 12 V ac/dc
• Maximum operating voltage: 440 V ac / 220 V dc
• Number of electrical maneuvers: 10,000
• Number of mechanical maneuvers: 20,000
• Rigid cable section: <=1x70 - <=2x25 - <=2x25+1x10 mm²
• Flexible cable section: <=1x50 - <=2x25 - 3x16 mm²
• Nominal tightening torque: 3.5 Nm / 3 Nm (lug)
• Operating temperature: -25/+60 degrees
• Storage temperature: -40/+70 degrees