GEN3 MCB6-320 20A Three Pole Miniature Circuit Breaker 6kA C-Curve

Description

Three-phase overload and short-circuit protection.

The GEN3 MCB6-320 is a three pole miniature circuit breaker rated 20A with a 6kA breaking capacity and a C-curve trip characteristic. It protects a three-phase circuit against overload and short-circuit faults, with all three poles tripping together to disconnect every phase if a fault occurs on any one. As a DIN-rail mounted device it installs quickly in a distribution board, and its C-curve characteristic suits general mixed loads with moderate inrush. Note that an MCB provides overcurrent protection only – it does not provide earth-leakage (residual current) protection.

Key Features

• 20A three pole miniature circuit breaker
• 6kA breaking capacity
• C-curve trip characteristic
• Protects three-phase circuits – all poles trip together
• Overload and short-circuit protection
• 35mm DIN-rail mount
• Three modules wide
• Australian/NZ approval or compliance certificates held
• Interchangeable with other major brands

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Built for Three-Phase Circuits

With three poles that trip together, the MCB6-320 is designed to protect three-phase circuits and equipment. If an overload or short-circuit occurs on any phase, all three poles open together, fully disconnecting the circuit. This makes it the appropriate choice for three-phase sub-circuits in commercial, industrial and agricultural distribution boards.

C-Curve and 6kA

The C-curve trip characteristic responds to short-circuit currents at roughly five to ten times the rated current, making it well suited to general circuits with a mix of resistive and inductive loads and moderate inrush. The 6kA breaking capacity is the prospective short-circuit current the breaker can safely interrupt, suiting typical sub-circuit positions in Australian installations.

Overcurrent Protection, Not Earth Leakage

The MCB6-320 is a miniature circuit breaker, providing overload and short-circuit protection. It does not provide earth-leakage or residual-current protection – where personal protection against earth leakage is required, an RCD or RCBO should be used in addition. The breaker carries Australian/NZ approval or compliance certificates and is interchangeable with other major brands.

Q: What is the difference between an MCB and an RCBO?
A: An MCB like the MCB6-320 protects against overload and short-circuit only. An RCBO adds earth-leakage (residual current) protection in the same device. Use an RCD or RCBO where protection against earth leakage is required.

Q: What does the C-curve mean on this breaker?
A: The C-curve trip characteristic trips on short-circuit currents of roughly five to ten times the rated current, suiting general mixed loads with moderate inrush. It is the most common characteristic for typical circuits.

Q: Is the MCB6-320 suitable for three-phase circuits?
A: Yes. It is a three pole breaker, so all three poles trip together to disconnect every phase, making it suitable for protecting three-phase circuits and equipment.