NOARK Ex9BN 3P B25 Miniature Circuit Breaker MCB 25A 6kA B-Curve 3-Pole

The NOARK Ex9BN 3P B25 is a high-quality miniature circuit breaker (MCB) designed for reliable overcurrent protection in residential, commercial, and industrial electrical installations. With a rated current of 25 A and a B-curve tripping characteristic, it provides fast response to short circuits and overloads, ensuring safety and equipment longevity. This 3-pole MCB complies with IEC/EN 60898-1 standards and offers a breaking capacity of 6 kA, making it suitable for a wide range of applications.

Advantages

• Reliable protection against overloads and short circuits
• B-curve characteristic for general-purpose use with resistive and light inductive loads
• Compact 3-module design (52.5 mm) for space-saving DIN rail mounting
• High breaking capacity of 6 kA ensures safety under fault conditions
• Durable construction with 10,000 electrical and 20,000 mechanical cycles
• Wide operating temperature range from -35°C to +70°C

Suitable for

• Distribution boards in residential and commercial buildings
• Protection of lighting circuits, sockets, and small appliances
• Industrial control panels and machinery
• Upgrading existing electrical systems to meet modern safety standards

Key specifications

• Product Type: Miniature Circuit Breaker (MCB)
• Series: Ex9BN
• Number of Poles: 3-Pole (3P)
• Rated Current (In): 25 A
• Tripping Curve: B-Curve
• Rated Short-circuit Breaking Capacity (Icn): 6 kA
• Rated Voltage (Ue): 230/400 V AC
• Rated Frequency: 50/60 Hz
• Mounting Type: DIN Rail (EN 60715)
• Terminal Capacity: 1-25 mm²
• Tightening Torque: 2.5 Nm
• Protection Degree: IP20 (Terminals), IP40 (Enclosed)
• Electrical Endurance: 10,000 cycles
• Mechanical Endurance: 20,000 cycles
• Standard: IEC/EN 60898-1
• Energy Limiting Class: 3
• Ambient Operating Temperature: -35 to +70 °C
• Connection Type: Screw Terminals
• Module Width: 3 Modules (52.5 mm)

Recommendations

For optimal protection, pair the NOARK Ex9BN 3P B25 with appropriate residual current devices (RCDs) and ensure correct sizing according to the load. Always follow local electrical codes and regulations during installation.