Circuit breaker noark Ex9BN 1P B10 — miniature single-pole B10 characteristic

Miniature circuit breaker noark Ex9BN 1P B10 is a single-pole protective device with a B10 tripping characteristic designed to detect and interrupt overcurrents and short circuits in low-voltage electrical installations. The Ex9BN series focuses on compact size and reliable thermal-magnetic tripping behaviour, making the device suitable for protecting lighting circuits, socket outlets and small branch circuits in residential, commercial and light industrial environments. The product is intended for DIN‑rail mounting and provides clear circuit isolation and manual switching capability.

Advantages

The Ex9BN 1P B10 features a compact housing that saves distribution board space while maintaining accessible manual control. Its B10 characteristic offers sensitivity to moderate inrush currents, reducing nuisance trips on common household and lighting loads. The thermal-magnetic mechanism provides consistent overload protection and fast response to short-circuit conditions, and the design supports standard DIN-rail installation for straightforward integration into existing consumer units.

Suitable for

• Protection of lighting circuits in homes and offices
• Protection of socket outlets and small appliance circuits
• Branch-circuit protection in small commercial and light industrial panels
• Retrofit or new installations using DIN-rail distribution boards

Key specifications

• Poles: single-pole (1P)
• Tripping characteristic: type B with 10 A rated current
• Function: thermal-magnetic overcurrent and short-circuit protection
• Mounting: standard DIN‑rail (EN/IEC compatible)
• Application class: residential, commercial, light industrial circuits
• Form factor: miniature size suitable for compact distribution boards

How to use

Install the miniature circuit breaker onto the DIN‑rail in the consumer unit or distribution board according to local electrical codes and manufacturer mounting instructions. Connect the line conductor to the breaker’s incoming terminal and the load conductor to the outgoing terminal, ensuring secure torque on terminal screws. Use the manual toggle to switch the circuit on or off and rely on the breaker to trip automatically under overload or short-circuit conditions. Periodically inspect terminal tightness and visual condition as part of routine electrical maintenance.

Usage recommendations

For correct selection, match the B10 rated current to the expected continuous load and consider upstream coordination with residual current devices and main overcurrent protection. Avoid exceeding the rated current and follow applicable wiring regulations and installation standards when fitting the device.