Rcbo (mcb/rcd)

RCBOs (Residual Current Circuit Breakers with Overcurrent Protection) provide dual protection by combining MCB overcurrent protection and RCD earth leakage detection in a single compact module. Essential for modern Australian electrical installations, RCBOs protect individual circuits against both overload faults and dangerous earth leakage currents.

For licensed electricians and contractors working on residential, commercial, and industrial projects, our RCBO range delivers space-saving circuit protection solutions that comply with AS/NZS 3000 wiring standards. Single-module RCBOs maximize switchboard capacity while providing comprehensive safety protection for lighting, power, and appliance circuits.

We stock RCBOs in various current ratings (6A–63A), breaking capacities (6kA–10kA), and sensitivity levels (30mA standard, 10mA for high-risk areas) from trusted brands. Whether you’re wiring new townhouse developments, upgrading older installations, or specifying commercial fit-outs, our wholesale RCBO selection covers standard and Type A configurations for modern electronic loads.

Trade customers benefit from competitive wholesale pricing on both single units and bulk orders. Order online for fast delivery across Australia, or collect same-day from our Fairfield East location to keep your projects on schedule.

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FAQs

What is the difference between an RCBO and a standard MCB?

An RCBO combines both MCB (overload/short circuit protection) and RCD (earth leakage protection) in one device, while a standard MCB only protects against overcurrent. RCBOs eliminate the need for separate RCD protection on individual circuits.

Do I need RCBOs for every circuit in a residential installation?

Australian wiring standards (AS/NZS 3000) require RCD protection for socket outlets, lighting circuits, and specific appliances. RCBOs provide an efficient way to meet these requirements while allowing independent circuit isolation without nuisance tripping.

What RCBO sensitivity rating should I use for standard residential circuits?

30mA sensitivity is standard for most residential circuits including power outlets and lighting. Use 10mA RCBOs for bathrooms, medical locations, or areas requiring enhanced protection against electric shock.

Can I mix RCBOs with standard MCBs in the same switchboard?

Yes, RCBOs work alongside standard MCBs and can replace individual MCB positions in your switchboard. This provides targeted circuit protection for circuits requiring RCD safety without protecting the entire board with a single RCD.

What breaking capacity RCBO do I need for typical residential installations?

6kA breaking capacity suits most residential installations. Specify 10kA RCBOs for commercial properties or locations with higher fault current levels near transformers or main distribution points.

Are Type A RCBOs necessary for modern appliances?

Type A RCBOs detect both AC and pulsating DC residual currents, making them essential for circuits supplying appliances with electronic controls (heat pumps, EV chargers, variable speed drives, cooking appliances) that produce DC leakage currents.