Hager MBN432 Interruttore automatico 4 poli 32A curva B 6kA

In a commercial distribution board, the Hager MBN432 protects three-phase circuits against overload and short-circuit. This 4-pole miniature circuit breaker trips magnetically on B-curve, making it suitable for circuits with low inrush currents such as lighting and socket outlets in office or residential buildings.

Key specifications

• Number of poles: 4
• Rated current: 32 A
• Tripping characteristic: B
• Breaking capacity: 6 kA
• Rated voltage: 230/400 V AC
• Frequency: 50/60 Hz
• Energy limitation class: 3
• Mounting: DIN rail
• Terminal capacity: 1–25 mm² rigid, 1–16 mm² flexible
• Module width: 4 modules

Why choose it

The MBN432 provides reliable protection for three-phase circuits with a 32 A load. Its B-curve ensures fast tripping on short circuits while avoiding nuisance trips on normal switching. The 6 kA breaking capacity suits most residential and commercial applications.

Ideal use cases

• Protection of three-phase socket outlets
• Lighting circuits in commercial buildings
• Distribution boards in residential installations

Good to know

The breaker mounts on a standard DIN rail and occupies 4 modules (72 mm). Screw terminals accept conductors up to 25 mm². Operating temperature range is -25°C to +70°C.