Gewiss Series 90 MTC 4P 20A C 6kA Circuit Breaker

The Gewiss MTC 4P 20A circuit breaker from the Series 90 MTC is designed to offer optimal protection against overloads and short circuits in residential, commercial, and industrial electrical installations. This high-quality compact device complies with the most demanding electrical safety standards, providing reliability and safety in any installation environment.

The GW90288 model from Gewiss is a 4-pole circuit breaker with a nominal current of 20 A and a C trip curve, making it ideal for applications requiring precise protection in circuits with moderate loads, such as motors and other inductive devices. The C curve ensures the breaker efficiently responds to moderate overloads, offering a balanced protection between response speed and tolerance to transient current peaks.

This breaker is designed to work with nominal voltages from 230 V to 400 V, operating in both single-phase and three-phase systems, with a breaking capacity of up to 6 kA according to the EN 60898 standard, ensuring its capability to interrupt short circuit currents under different operating conditions. In compliance with the EN 60947-2 standard, its breaking capacity is even higher, reaching up to 7.5 kA at 230 V, thus ensuring superior protection in demanding industrial environments.

The MTC 4P breaker comes in a 2-module format, facilitating its integration into electrical panels with limited space, without sacrificing the quality or performance of the device. Additionally, it is designed to withstand a wide range of operating temperatures, from -25°C to 60°C, making it a robust and durable solution even in environments with extreme conditions.

Key Technical Features:

• Nominal current: 20 A
• C trip curve: Ideal for applications with inductive loads and moderate current peaks.
• Nominal voltage: Operation between 230 V and 400 V, suitable for single-phase and three-phase systems.
• Breaking capacity: Up to 6 kA as per EN 60898, and 7.5 kA as per EN 60947-2, ensuring safe protection against short circuits.
• Number of poles: 4, allowing use in three-phase systems with neutral.
• Dimensions: 2 modules, optimising space in compact electrical panels.
• Nominal frequency: 50/60 Hz, compatible with standard electrical networks.
• Certification: Complies with EN 60898 and EN 60947-2 standards, ensuring its use in low and medium voltage applications.
• Switching capacity: Up to 10,000 electrical operations and 20,000 mechanical operations, ensuring a long service life for the device.

Regarding its connection capacity, the breaker supports a wide range of cable sections for both rigid and flexible cables. For rigid cable, it can connect up to 1x16 mm², while for flexible cable it supports up to 2x6 mm², ensuring versatile installation in various wiring configurations. Additionally, the breaker has a nominal tightening torque of 1.2 Nm, ensuring secure and durable connections.

Additional Specifications:

• Insulation voltage (Ui): 500 V, providing an additional barrier against potential electrical failures.
• Rated impulse withstand voltage (Uimp): 4 kV, giving it resistance against transient voltage peaks.
• Storage temperature: From -40°C to +70°C, ensuring its integrity even during long periods of inactivity in extreme conditions.
• Minimum operating voltage: 12 V AC/DC, allowing safe operation in low voltage systems.
• Maximum operating voltage: 440 V AC / 220 V DC, expanding its application possibilities in various electrical installations.

This circuit breaker also boasts remarkable mechanical and electrical resistance, withstanding up to 10,000 electrical operations and 20,000 mechanical operations, ensuring its durability and reliability over the long term.

The Gewiss Series 90 MTC circuit breaker is the perfect solution for those seeking comprehensive and reliable protection in demanding electrical applications. Its robustness, reliability, and adaptability to different environments make it an ideal choice for all types of installations, from the simplest to the most complex.