Eaton 211811 AZ-3-C125 MCB 3P 125 A C Curve 6kA DIN Rail

The Eaton AZ-3-C125 is a 3-pole type C miniature circuit breaker (MCB) from the Moeller series xEffect range, delivering reliable overcurrent and short-circuit protection in industrial and advanced commercial switchgear. Rated at 125 A on 230/400 V AC systems, it achieves selectivity class 3 and current limiting class 3, certified to IEC/EN 60947-2.

Technical specifications:

• Model code: AZ-3-C125
• Catalog number: 211811
• Manufacturer: Eaton
• EAN: 4015082118112
• Poles: 3-pole
• Tripping characteristic: C
• Rated current: 125 A
• Voltage rating: 230 V AC / 400 V AC
• DC voltage rating: 60 V DC per pole
• Frequency: 50-60 Hz
• Rated impulse withstand voltage (Uimp): 4 kV
• Overvoltage category: III
• Current limiting class: 3
• Selectivity class: 3
• Admissible back-up fuse: max. 200 A gL/gG
• Pollution degree: 2
• Degree of protection: IP20 / IP40 (when fitted)
• Ambient operating temperature: -25 °C to +55 °C
• Mounting: Top-hat rail IEC/EN 60715
• Mounting width: 27 mm / 4.5 modular spacings
• Frame: 45 mm
• Dimensions (W x H x D): 81 x 75 x 90 mm
• Weight: 0.658 kg
• Connectable conductor cross-section: 2.5-50 mm² (solid-core and multi-wired)
• Terminals: Lift terminals, finger and touch-safe (DGUV VS3, EN 50274)
• Equipment heat dissipation (current-dependent): 35.7 W
• Heat dissipation per pole (current-dependent): 11.9 W
• Direction of incoming supply: as required
• Electrical lifespan: 10,000 operations
• Certifications: IEC/EN 60947-2, EN 45545-2, IEC 61373, RoHS

Features and benefits:

• Wide temperature range (-25 °C to +55 °C) with 0.5% linear current capacity reduction per 1 °C rise, enabling accurate thermal planning
• Lift terminals accept 2.5-50 mm² solid-core and multi-wire conductors for flexible wiring options
• Finger and touch-safe terminal protection to DGUV VS3 and EN 50274 for improved panel builder safety
• Direction of incoming supply unrestricted - top or bottom cable entry supported without derating
• Compatible with additional accessories for extended functionality in complex industrial switchgear

Applications:

• Main and sub-distribution boards in industrial control panels at 400 V AC
• Advanced commercial switchgear assemblies requiring high-current branch protection
• Railway rolling stock electrical systems (EN 45545-2 fire protection and IEC 61373 shock/vibration certified)
• Motor feeder and group circuit protection at 125 A in manufacturing and process plant environments
• Industrial machinery power distribution requiring selectivity class 3 coordination

Compliant with IEC/EN 60947-2. Part of the Eaton Moeller series xEffect AZ range for industrial miniature circuit protection.

Also known as: Eaton AZ-3-C125, Eaton 211811, Eaton catalog 211811, Eaton model AZ-3-C125, Eaton xEffect AZ 125 A 3-pole C-curve MCB.