MCBs

MCBs

MCBs

Product catalog summary
Overview: The document provides a comprehensive overview of Siemens' miniature circuit breakers (MCBs) designed for residential buildings and infrastructure applications. It covers various models, their specifications, approvals, and application areas.
Specifications: The MCBs are compliant with standards such as IEC/EN 60898-1, IEC/EN 60947-2, and UL489. They offer different switching capacities, operational voltages, and are suitable for various environmental conditions, including harsh ambient conditions.
Approvals: The products have received approvals from multiple international bodies, including VDE (Germany), CEBEC (Belgium), LCIE (France), IMQ (Italy), GOST (Russia), and CCC (China). Some models are also approved for marine classifications by GL (Germany), BV (France), LRS (UK), RINA (Italy), and DNV (Norway).
Switching Capacity: The document details the switching capacities for AC and DC currents according to different standards, with capacities ranging from 6 kA to 70 kA depending on the model and application.
Operational Voltage: The MCBs support a maximum operational voltage of up to 480/277 V AC for certain models, with specific ratings for DC applications.
Environmental Conditions: The MCBs are designed to withstand shocks and vibrations as per IEC standards and are suitable for temperatures ranging from -40°C to +70°C.
Application Areas: The MCBs are categorized based on their characteristics for different applications, such as semiconductor protection, residential building installations, and equipment with higher starting currents.
Additional Features: The MCBs offer easy handling with integrated touch protection, visible conductor connections, and tool-free device replacement. They also include auxiliary contacts and shunt releases for enhanced functionality.
Conclusion: Siemens' MCBs provide reliable protection and easy installation for various electrical systems, with a focus on safety and compliance with international standards.
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Catalog excerpts

MCBs-1

Miniature Circuit Breakers Overview | Clarity right along the line Residential buildings and infrastructure applications Miniature Circuit Breakers Univ. current Mechanical engineering and industrial requirements Approvals Product standard VDE Germany, Europe United Kingdom Switching capacity Icn acc. to IEC/EN 60898-1 (kA AC) Operational voltage max. V DC/pole, acc. to EN 60898-1/-2 and EN 60947-2 max. V AC, acc. to EN 60898-1/-2 and EN 60947-2 max. V AC acc. to UL 1077 and CSA C22.2 No.235 – supplementary protection Rated voltage V AC acc. to to UL 489 – branch circuit protection Harsh ambient conditions Fire protection values acc. to EN 45545-2 (fire protection in rail vehicles) Resistant to vibrations and shocks acc. EN 61373 and EN 50155 “1B” (railway technology) Pollution degree for overvoltage category Application areas Char. A – Semiconductor protection Char. B – Mainly in residential building installations Char. C – Higher starting currents (e.g. lamps, motors) Char. D – Pulse-generating equipment (e.g. transformers, solenoid valves) Char. E – Selective main miniature circuit breakers Plug-in terminals Selective main miniature circuit breakers Additional components Auxiliary contacts, fault signal contacts Shunt releases, undervoltage releases AFDD For switching capacity: Detailed information is avai

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MCBs-2

Miniature Circuit Breakers Overview | Clarity right along the line Easy handling with high security Clarity right along the line -for- Ufz. Highlights • Busbar at the back for easy, continuous bus mounting and wiring • Touch protection when grasping the device -exceeds VBG4/BGV A3 requirements • Busbar assembly devices are replaced faster and with less effort The order number is systematically configured and provides information on the key features of the miniature circuit breakers: Series, rated switching capacity, number of poles, rated current and characteristics. The table provides an overview...

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