Clipsal MAX9 Miniature Circuit-Breaker (MCB) 3-Pole 20A C-Curve 6kA 415V Distribution

SKU: climcbmx9mc320

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$39.56 (ex-GST)

$43.52 (inc-GST)

$43.52

$39.56

(inc-GST)

(ex-GST)

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Clipsal MAX9 MX9MC320 three-pole miniature circuit-breaker: 20A C-curve, 6000A breaking capacity at 415V AC, 3-module DIN rail. Padlockable, MAXBAR busbar compatible. RCM approved to AS/NZS 60898. 7-year warranty.

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Three-pole 20A distribution protection built for tough Aussie switchboards.

The Clipsal MX9MC320 is a 3-pole 20A miniature circuit-breaker from the MAX9 range, delivering a C-curve trip characteristic and 6kA breaking capacity for reliable overload and short-circuit protection on three-phase final sub-circuits. Rated 415V AC 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 20A at 30°C, three pole (3P)
C-curve tripping (5–10 x In) — suits general mixed lighting and power circuits
Breaking capacity 6000A (Icn) to AS/NZS 60898
Rated 415V AC, 50/60Hz
Compatible with MAX9 18mm-pitch pin busbar for fast connection
MAXBAR compatible when used as main incomer
Line connection from top or bottom for install flexibility
Tunnel-type terminals — 1–16 mm² flexible or 1–25 mm² rigid
Padlockable in the OFF position with positive contact indicator on the toggle
Endurance rated to 20,000 mechanical and 10,000 electrical cycles
Three modules wide (54mm) — 6 x 9mm pitches
Backed by a 7-year Clipsal warranty

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Why it Matters

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

Fast Fit-Off with MAXBAR or Pin Busbar
The MX9MC320 is compatible with the MAX9 18mm-pitch pin busbar for direct interconnection across the row, and picks up feed from the MAXBAR system when used as a main incomer — Clipsal reports installation up to 15 times faster than cable-fed circuits. Top or bottom cable entry with combination-head screws keeps every fit-off quick and consistent.

Built Tough and Built to Last
Rated to 20,000 mechanical and 10,000 electrical operations, with an operating range of -25°C to 70°C (derating applies), the MX9MC320 is made for the temperature swings of real Australian switchboards. Limitation class 3 keeps let-through energy down during a fault, protecting downstream cabling.

Is the MX9MC320 a three-pole breaker?
Yes. It is a 3-pole (3P) MCB occupying three 18mm modules (54mm total) on the DIN rail, protecting all three active conductors of a three-phase circuit with a common trip bar.

What does the C curve mean on this MCB?
C-curve means the breaker trips magnetically at 5 to 10 times its 20A rating, making it suitable for general three-phase circuits with moderate inrush such as motors, lighting banks and mixed power outlets.

What is the breaking capacity of the MX9MC320?
It has a rated short-circuit breaking capacity of 6000A (6kA) Icn at 415V AC, tested to AS/NZS 60898 for use in residential and commercial switchboards.

(climcbmx9mc320)

Design
Range	MAX9
Product type	Miniature Circuit-Breaker (MCB)
Device application	Distribution
Warranty	7 years
Electrical
Rated current (In)	20A at 30°C
Rated operational voltage (Ue)	415V AC 50/60 Hz
Rated insulation voltage (Ui)	500V
Rated impulse withstand voltage (Uimp)	4 kV
Curve code	C
Magnetic tripping limit	5–10 x In
Breaking capacity	6000A Icn at 415V AC 50/60 Hz to AS/NZS 60898
Rated service breaking capacity (Ics)	6000A (100%) at 415V AC 50/60 Hz
Limitation class	3
Poles	3P
Number of protected poles	3
Network type	AC
Network frequency	50/60 Hz
Heat dissipation	2.2 W
Mechanical & Connections
Control type	Toggle
Local signalling	ON/OFF indication
Contact position indicator	Yes
Suitability for isolation	Yes
Provision for padlocking	Padlockable
Connections – terminals	Tunnel type (top or bottom): 1–16 mm² flexible / 1–25 mm² rigid
Wire stripping length	14 mm (top or bottom connection)
Tightening torque	2 N·m
Mechanical durability	20,000 cycles
Electrical durability	10,000 cycles at 240V
Physical
Module width	3 modules (18mm pitch)
Height	85 mm
Width	54 mm
Depth	75 mm
Embedding depth	44 mm
Grid distance	45 mm
Net weight	375 g
Environmental
IP degree of protection	IP20
Ambient temperature for operation	−25 to +70°C (derating applies)
Ambient temperature for storage	−40 to +85°C
Relative humidity	95% at 55°C
Pollution degree	2
Overvoltage category	III
Tropicalisation	Severity B to IEC 60068-2-30
Operating altitude	0 to 2000 m
Temperature derating (In at ambient)	20.7A @ 20°C / 20A @ 30°C / 19.3A @ 40°C / 18.6A @ 50°C / 17.8A @ 60°C / 17A @ 70°C
Standards & Compliance
Standards	AS/NZS 60898
Quality labels	RCM
Mercury free	Yes
Environmental disclosure	ENVPEP2205015EN
Packaging
Unit type of package	PCE (1 piece)
Package height	7.4 cm
Package width	8.5 cm
Package length	5.3 cm
Package weight	319 g