Circuit breaker noark Ex9BN 1P B16 — miniature single-pole B characteristic 16 A

Miniature circuit breaker noark Ex9BN 1P B16 is a single-pole protective device with a B tripping characteristic and a rated current of 16 A. It is intended for overcurrent and short-circuit protection in residential and light commercial electrical installations. The compact design fits standard DIN-rail distribution boards and provides reliable circuit isolation for lighting and small appliance circuits while meeting common installation and safety practices.

Advantages

The Ex9BN 1P B16 combines a compact footprint with a defined B-type magnetic trip curve, providing sensitive protection against moderate inrush currents and fast disconnection under short-circuit conditions. Its standardized DIN-rail mounting and clear rating marking simplify installation and maintenance. The device offers thermal-magnetic protection that responds to both overloads and instantaneous faults, helping to reduce wiring and equipment damage while allowing straightforward replacement in modular distribution systems.

Suitable for

• Residential lighting and socket circuits
• Small commercial and office electrical circuits with low motor inrush
• Protection of sub-circuits in domestic distribution boards
• Retrofit installations where DIN-rail modular breakers are used

Key specifications

• Poles: single-pole (1P)
• Tripping characteristic: B-type (suitable for circuits with low inrush current)
• Rated current: 16 A
• Function: thermal-magnetic overcurrent and short-circuit protection
• Mounting: standard DIN-rail compatible
• Application environment: indoor electrical distribution panels for residential and light commercial use

How to use

Install the breaker in a compatible DIN-rail distribution board following local electrical codes and manufacturer installation guidelines. Ensure all power is disconnected before wiring. Connect the phase conductor to the breaker input terminal and the outgoing circuit conductor to the output terminal, tightening terminals to the torque specified by the panel or wiring instructions. After wiring, switch the breaker on to restore the circuit and verify correct operation by observing that the device remains closed under normal load and trips when a fault condition is simulated or occurs.

Usage recommendations

Use the Ex9BN 1P B16 in circuits where a B-characteristic response is appropriate—typically lighting and general-purpose socket circuits without significant motor startup currents. Coordinate with upstream and downstream protective devices to ensure selectivity. Periodically inspect terminal tightness and the breaker’s mechanical operation during routine maintenance and replace the device if it shows signs of damage or erratic tripping.