Shop miniature circuit breakers (MCB) for reliable overload and short-circuit protection on final sub-circuits, in single and multi-pole configurations. Trusted by electrical contractors across Australia.
N.A.W. Controls’ Miniature Circuit Breakers protect final sub-circuits from overload and short-circuit damage, tripping quickly to isolate a fault before it can cause harm to wiring, equipment or people. Available in 1, 2, 3 and 4-pole configurations across a range of current ratings, MCBs suit everything from lighting and power circuits to small motor loads.
Selecting the right MCB means matching the current rating and breaking capacity (kA) to the circuit’s load and fault level, and choosing a curve type (B, C or D) suited to the connected equipment. Our range is selected for compliance with AS/NZS wiring standards, making it a reliable first choice for switchboard builders and electrical contractors specifying new or replacement protection.
Curve B suits general lighting and resistive loads, Curve C is common for motors and other inductive loads with higher inrush current, and Curve D suits equipment with very high inrush, such as transformers.
Single-pole MCBs protect single-phase circuits, while 2, 3 and 4-pole versions cover split-phase and three-phase circuits. Match the number of poles to the phases being protected.
In most cases yes, provided the new MCB matches the current rating, curve type and breaking capacity of the original, and fits your existing enclosure and busbar system.
Are these MCBs compliant with Australian standards?
Yes, our MCB range is selected to meet relevant AS/NZS wiring and protection standards for use in Australian switchboards.
Do you stock MCB accessories like auxiliary contacts?
Yes, a range of MCB accessories is available to add auxiliary and alarm contacts, shunt trips and other functions – ask our team for compatibility with your specific range.
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