Circuit breaker noark Ex9BN 3P C16 miniature three-pole 16 A C-characteristic

Miniature circuit breaker noark Ex9BN 3P C16 is a three-pole protection device rated at 16 A with a C tripping characteristic, designed to provide reliable overcurrent and short-circuit protection in three-phase electrical installations. Intended for installation in distribution boards, this device isolates faulty circuits and helps maintain safe operation of residential, commercial and light industrial power systems. The breaker fits standard DIN-rail panels and is suitable for protecting cable runs, motor feeders and lighting circuits where a moderate inrush current may occur.

Advantages

The Ex9BN 3P C16 offers repeatable and stable thermal-magnetic tripping behaviour with a C characteristic that balances sensitivity to overloads and tolerance for short-term inrush currents. Its compact miniature design saves panel space while providing clear manual disconnection and reliable automatic fault clearing. Built with standard connection points and compatible with common accessories, the breaker supports straightforward installation and maintenance in typical power distribution applications.

Suitable for

• Overcurrent and short-circuit protection in three-phase branch circuits
• Residential distribution boards and apartment electrical panels
• Commercial and light industrial distribution for lighting, outlets and small motors
• Cable protection where moderate motor or transformer inrush currents are expected

Key specifications

• Poles: three-pole configuration for three-phase systems
• Rated current: 16 A
• Tripping characteristic: C-type (thermal-magnetic)
• Function: overcurrent and short-circuit protection with manual ON/OFF operation
• Mounting: DIN-rail compatible miniature form factor
• Connection: screw terminals for line and load conductors

How to use

Install the breaker on a standard DIN-rail inside a suitably rated distribution board, ensuring the unit is mounted in accordance with local electrical codes and the panel manufacturer's instructions. Connect the three incoming phase conductors to the line side terminals and the outgoing phase conductors to the load side, tightening terminals to the recommended torque. Use the manual toggle to switch the circuit on or off; in the event of an overload or short circuit the breaker will trip automatically to isolate the faulty circuit. After resolving the fault, restore power by moving the toggle to the OFF position and then back to ON as required.

Usage recommendations

Select this C16 three-pole breaker where coordinated protection is required for three-phase branch circuits with moderate inrush currents, and verify compatibility with conductor cross-sections and upstream protection devices. Adhere to applicable installation standards and perform periodic visual inspections and functional tests to ensure continued reliable operation.