Circuit breaker noark Ex9BN 3-pole B32 3P B32 MPN 100056

Miniature circuit breaker noark Ex9BN 3P B32 is a three-pole overcurrent protection device with a B characteristic and a rated current of 32 A. Intended for DIN-rail mounting in low-voltage distribution boards, this compact breaker interrupts overloads and short circuits across three phases, providing coordinated protection for residential, commercial and light-industrial electrical installations.

Advantages

The device combines a compact housing with stable thermal-magnetic tripping characteristics suitable for general-purpose circuits with moderate inrush currents. Its B trip curve ensures fast response to short-circuit conditions while allowing normal operation of most lighting and small-motor loads. The modular design supports straightforward installation on standard 35 mm DIN rails and reliable mechanical operation for regular switching and protection tasks.

Suitable for

• Three-phase branch circuit protection in residential distribution panels
• Protecting lighting circuits and socket outlets with low to moderate inrush
• Small commercial installations and light industrial circuits requiring coordinated protection

Key specifications

• Poles: 3 (three-pole)
• Tripping characteristic: Type B (thermal-magnetic)
• Rated current: 32 A
• Mounting: 35 mm DIN-rail compatible
• Function: Overload and short-circuit protection
• Application: Low-voltage distribution boards

How to use

Install the circuit breaker on a standard 35 mm DIN rail inside the distribution board following local electrical codes and safety procedures. Connect line and load conductors to the designated terminals, ensuring correct tightening torques and polarity for three-phase wiring. After wiring, test the breaker by switching it on and verifying correct operation under normal load; perform a trip test if appropriate for commissioning procedures. Ensure the breaker is accessible for inspection and switching, and label circuits clearly.

Usage recommendations

Use this breaker where a B-type trip curve is appropriate—typical for lighting and general-purpose circuits with low to moderate inrush currents. Coordinate with upstream and downstream protection devices to ensure selective tripping. Periodically inspect connections for tightness and signs of overheating; replace if mechanical damage or degraded performance is observed.