Clipsal MX9MC263 MAX9 MCB 2P 63A C Curve 6kA 415V Miniature Circuit Breaker

Description

Double-pole 63A protection for main incomer and heavy sub-mains duty.

The Clipsal MX9MC263 is a 2-pole, 63A Type C miniature circuit breaker from the MAX9 range, delivering 6kA short-circuit breaking capacity at 415V. At the top of the 2P MCB range, it suits sub-mains, main-incomer positions and boards feeding heavy downstream loads across Australian residential, commercial and light-industrial installations.

Key Features

• Rated current: 63A at 30°C
• Poles: 2P (2 protected poles)
• Trip curve: Type C (magnetic tripping 5–10 x In)
• Breaking capacity: 6000A (6kA) Icn at 415V AC, conforming to AS/NZS 60898
• Rated voltage: 415V AC 50/60Hz
• Module width: 2 modules (36mm)
• Terminals: Tunnel-type, top or bottom entry, up to 35mm² rigid
• Top and bottom line connection for installation flexibility
• Through-hole for sealing by wire (40A and above)
• Contact position indicator and ON/OFF toggle signalling
• Padlockable in the OFF position
• 7-year warranty

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Why it Matters

Built for Australian conditions

The MX9MC263 is designed to operate across a wide ambient range of −25°C to +70°C (with derating), making it suitable for switchboards in hot roof spaces, sheds and exposed plant rooms. It carries the RCM mark and is built to AS/NZS 60898, meeting the compliance expectations of licensed electricians working to the Wiring Rules.

Sized for the heaviest 2P sub-mains

At 63A the MX9MC263 sits at the top of the 2-pole MCB range and is well matched to main-switch or main-incomer duty, workshop and machinery sub-mains, and boards where multiple downstream RCBOs sit behind a single upstream breaker. Tunnel-type terminals accept up to 35mm² rigid conductors with a 3.5 N.m tightening torque for a solid, gas-tight connection on heavy cables.

Tamper-resistant switchboards

From 40A upwards, MAX9 MCBs include a through-hole for sealing by wire — useful where switchboard access needs to be verifiable, such as landlord, tenanted or asset-management boards. The device is also compatible with the A9A26970 padlocking accessory.

Fast, flexible installation

Line connection can be taken from either the top or bottom, and the breaker is compatible with the MAX9 18mm pitch pin-type busbar system. A double locking clip speeds mounting and removal on the DIN rail. Endurance is rated at 20,000 mechanical and 10,000 electrical cycles.

Is the MX9MC263 a single or double pole breaker?
It is a 2-pole (double pole) MCB, switching and protecting two poles simultaneously.

Can the MX9MC263 be used as a main switch?
Yes — at 63A it is commonly used as a main-incomer or upstream sub-mains breaker in MAX9 distribution boards, feeding downstream MCBs or RCBOs via the MAX9 pin-type busbar.

What is the breaking capacity of the MX9MC263?
It has a 6000A (6kA) short-circuit breaking capacity at 415V AC, conforming to AS/NZS 60898.