Hager LNH3400M 4-Pole 40A C-Curve MCB 6kA

Protecting circuits from overload and short-circuit is critical in any electrical installation. The Hager LNH3400M is a 4-pole miniature circuit breaker (MCB) with a rated current of 40 A and C tripping curve, ensuring reliable protection for cables and equipment in residential, commercial, and industrial settings. Its 6 kA breaking capacity handles high fault currents safely.

Who is it for

Electricians and panel builders needing a robust, DIN-rail mountable MCB for three-phase circuits. Suitable for distribution boards in buildings, industrial control panels, and wherever 4-pole protection is required.

Main features

• 4-pole (4P) design for three-phase and neutral protection
• Rated current: 40 A
• Tripping curve: C (for general applications with moderate inrush currents)
• Breaking capacity: 6 kA according to EN 60898-1
• Rated voltage: 230/400 V AC, 50/60 Hz
• Mounting: DIN rail (EN 60715)
• Width: 4 modules (approx. 66 mm)
• Screw terminals for rigid (1-35 mm²) and flexible (1-25 mm²) conductors
• Degree of protection: IP20 (terminals), IP40 (device in enclosure)
• Operating temperature: -25 to 70 °C

Specifications

• Number of poles: 4P
• Rated current: 40 A
• Tripping curve: C
• Rated breaking capacity: 6 kA (EN 60898-1)
• Rated voltage: 230/400 V AC
• Frequency: 50/60 Hz
• Mounting type: DIN rail (EN 60715)
• Module width: 4 modules
• Terminal capacity rigid: 1-35 mm²
• Terminal capacity flexible: 1-25 mm²
• Degree of protection: IP20 (terminals), IP40 (device in enclosure)
• Electrical endurance: 10000 cycles
• Mechanical endurance: 20000 cycles
• Operating temperature: -25 to 70 °C
• Connection type: screw terminals
• Standard compliance: EN 60898-1, IEC 60898-1

Tips

Ensure the MCB's rated current matches the circuit's load and cable cross-section. For motor circuits with high inrush, consider a D-curve breaker. Always install in a suitable enclosure to maintain IP40 protection.