Clipsal MX9MC163 MAX9 Miniature Circuit-Breaker MCB 1P 63A C Curve 6kA 240/415V

Description

Single-pole 63A protection built for tough Aussie switchboards.

The Clipsal MX9MC163 is a 1-pole 63A miniature circuit-breaker from the MAX9 range and the highest current rating in the 1P C-curve line-up, delivering a C-curve trip characteristic and 6kA breaking capacity for reliable overload and short-circuit protection on heavy final sub-circuits. Rated 240/415V and built to AS/NZS 60898, it's a dependable distribution-board workhorse for electricians fitting out homes, commercial fit-outs and light industrial boards.

Key Features

• Rated current 63A at 30°C, single pole (1P) — top of the 1P range
• C-curve tripping (5–10 x In) — suits general mixed lighting and power circuits
• Breaking capacity 6000A (Icn) to AS/NZS 60898
• Rated 240/415V AC, 50/60Hz
• Compatible with MAX9 18mm-pitch pin busbar for fast connection
• Line connection from top or bottom for install flexibility
• Through-hole for sealing by wire (40A and above) plus padlockable in the OFF position
• Positive contact indicator on the toggle
• Endurance rated to 20,000 mechanical and 10,000 electrical cycles
• Single module wide (18mm) — 2 x 9mm pitches
• Backed by a 7-year Clipsal warranty

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Why it Matters

C-Curve for General Circuits
The C-curve trips between 5 and 10 times rated current, giving it the headroom to ride out normal inrush from mixed lighting and small-motor loads without nuisance tripping, while still clearing genuine faults quickly. It's the go-to characteristic for general-purpose final sub-circuits in Australian distribution boards.

Wire Sealing for Secured Circuits
At 40A and above, this MCB includes a through-hole for sealing by wire, letting you lock the device against unauthorised removal — useful where a circuit needs to stay verifiably in place. It's also compatible with the A9A26970 padlocking device for OFF-position locking.

The Top of the 1P Range
At 63A this is the largest single-pole rating in the MAX9 1P MCB family. Its higher current handling makes it the choice for the heaviest single-phase final sub-circuits where a full 63A of capacity is needed within a single 18mm module.

Is the MX9MC163 a single-pole breaker?
Yes. It is a 1-pole (1P) MCB occupying a single 18mm module on the DIN rail, protecting one active conductor.

What does the C curve mean on this MCB?
C-curve means the breaker trips magnetically at 5 to 10 times its 63A rating, making it suitable for general circuits with moderate inrush such as lighting and power outlets.

What is the breaking capacity of the MX9MC163?
It has a rated short-circuit breaking capacity of 6000A (6kA), tested to AS/NZS 60898 for use in residential and commercial switchboards.