Clipsal MX9MC306 MAX9 Miniature Circuit Breaker MCB 3P 6A C Curve 6kA 415V Distribution RCM

Description

Three-phase circuit protection for the distribution board.

The Clipsal MX9MC306 is a 3-pole 6A C-Curve MCB from the MAX9 range, designed for downstream distribution circuits requiring simultaneous protection across all three phases. Rated 415V AC with 6000A breaking capacity to AS/NZS 60898.

Key Features

• 3-pole configuration, 6A rated current at 30°C
• C-Curve tripping characteristic (magnetic 5-10 x In)
• 6000A breaking capacity to AS/NZS 60898
• 415V AC 50/60 Hz rated operational voltage
• 54 mm width (3 modules), DIN-rail mount
• Compatible with MAX9 18 mm pitch pin-type busbar and MAXBAR
• Top or bottom line connection flexibility
• Combination-head screws for multiple screwdriver types
• Padlockable, compatible with A9A26970 padlocking device
• Positive contact indicator on toggle
• 7-year Clipsal warranty

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Why it Matters

Built for Australian switchboards
The MX9MC306 is designed and type-tested for Australian conditions, conforming to AS/NZS 60898 for circuit-breakers used in household and similar installations. RCM-marked and rated for -25°C to +70°C ambient operation (with derating), it handles the full range of Aussie site environments from cool southern winters to hot northern summers.

Simultaneous three-phase protection
As a 3-pole device, all three phases are switched together by a single toggle. If a fault trips the breaker on any pole, all three isolate at once — the correct behaviour for protecting three-phase distribution circuits and keeping downstream equipment safe from single-phasing damage.

Fast, clean installation
The 54 mm three-module footprint drops straight onto standard DIN rail, while compatibility with MAX9 pin-type busbar and MAXBAR distribution shortens the wiring time on final sub-circuits. Combination-head screws accept multiple screwdriver types and the double locking clip makes removal from a busbar straightforward when reconfiguring the board.

Q: What is the MX9MC306 used for?
It is a 3-pole 6A C-Curve miniature circuit-breaker designed for distribution circuit protection in a MAX9 switchboard, providing simultaneous overcurrent and short-circuit protection across all three phases of a downstream 3-phase sub-circuit.

Q: What is the difference between a distribution MCB and an incomer MCB?
A distribution MCB protects a downstream final sub-circuit and typically has a black toggle. An incomer MCB sits at the head of the switchboard as the main switch and, in the 63A Clipsal MAX9 variant, has a dedicated red toggle for visual identification.

Q: What breaking capacity does the MX9MC306 offer?
It provides 6000A breaking capacity at 415V AC 50/60 Hz, tested to AS/NZS 60898, with a rated service breaking capacity (Ics) of 6000A at 100%.