ABB S202M-C4 4A High Performance MCB 2P C Curve

The ABB S202M-C4 4A High Performance MCB 2P C Curve is a vital component in modern electrical protection systems, offering robust safety and reliability for a wide range of industrial and commercial applications. This Miniature Circuit Breaker (MCB) boasts a C-curve tripping characteristic, specifically designed for circuits with moderate inductive loads where inrush currents are common, such as motor control centers and fluorescent lighting systems. Its key advantages lie in its high breaking capacity, ensuring safe interruption of fault currents, and its precise tripping mechanism that protects sensitive equipment from damage. With a 2-pole configuration, it provides simultaneous disconnection of both live and neutral conductors, enhancing safety during maintenance. The S202M series represents ABB's commitment to delivering high-performance, dependable circuit protection solutions engineered for demanding environments.

Product Specifications

| Feature             | Specification                               |

| :------------------ | :------------------------------------------ |

| Product Type        | Miniature Circuit Breaker (MCB)             |

| Series              | S200M                                       |

| Poles               | 2                                           |

| Rated Current       | 4A                                          |

| Tripping Curve      | C                                           |

| Breading Capacity | 10 (IEC/EN 60947-2)                   “               2222         222        2  222         2  22         S22)                22)            22)           22)           2  222   222        2  22         S2 2

| Rated Voltage       | 230/400V AC                                 |

| Frequency           | 50/60 Hz                                    |

| Protection          | Overcurrent and Short Circuit Protection    |

| Terminal Type       | Screw Terminals                             |

| Mounting            | DIN Rail (35mm)                             |

| Environmental Class | IP20                                        |

| Operating Temperature | -25°C to +55°C                              |

| Compliance          | IEC/EN 60898-1, IEC/EN 60947-2              |

Core Features & Market Positioning

The ABB S202M-C4 4A distinguishes itself through its superior performance characteristics and robust construction, positioning it as a premium choice for critical electrical infrastructure. Its high breaking capacity of 10 kA ensures it can safely handle significant fault currents, a crucial factor in industrial settings where equipment failure can lead to severe consequences. The C-curve tripping characteristic is meticulously engineered to accommodate the typical inrush currents associated with inductive loads like motors and transformers, preventing nuisance tripping while still providing rapid protection against short circuits. This makes the S202M-C4 particularly well-suited for applications demanding high reliability and precise protection, setting it apart from standard MCBs in terms of performance and longevity. ABB's reputation for quality and innovation further solidifies the S202M-C4's market standing as a dependable and advanced circuit protection solution.

Key Application Scenarios

This high-performance MCB is ideally suited for protecting circuits in industrial control panels, motor starter assemblies, and distribution boards where inductive loads are prevalent. Its 4A rating and C-curve characteristic make it an excellent choice for safeguarding smaller motors, pumps, fans, and lighting circuits with ballast or electronic drivers, common in manufacturing plants and commercial buildings. Furthermore, the 2-pole configuration ensures complete isolation of both live and neutral conductors, crucial for safety compliance in machinery and automation systems. The robustness and reliability of the S202M-C4 ensure uninterrupted operation in environments requiring stringent protection against overloads and short circuits.

Practical System Integration Guidance

Integrating the ABB S202M-C4 4A into existing electrical systems is straightforward due to its standard DIN rail mounting and screw terminal connections. Installers must ensure the MCB is securely attached to a 35mm DIN rail within the enclosure. Wiring should be performed according to local electrical codes and standards, ensuring proper conductor termination to prevent overheating and ensure a reliable connection. For the 2-pole configuration, both the line and neutral conductors of the protected circuit must be connected to the respective terminals of the MCB. It is essential to verify the incoming voltage and frequency match the MCB's specifications (230/400V AC, 50/60 Hz) before energizing the circuit. Over-tightening terminals can damage the busbar, while under-tightening can lead to poor contact and potential arcing.

Operation and Risk Mitigation

The ABB S202M-C4 4A operates by detecting overcurrents (overloads and short circuits) and automatically interrupting the circuit to prevent damage to connected equipment and mitigate fire hazards. The C-curve allows for inrush currents up to 5-10 times the rated current before tripping, while still providing sensitive protection against short circuits. To mitigate risks, ensure the MCB is correctly rated for the load and environment, and that the breaking capacity (10 kA) exceeds the maximum prospective fault current at the point of installation. Regular visual inspections for signs of overheating or physical damage are recommended. In the event of repeated tripping, it is crucial to investigate the cause, which could range from an overloaded circuit to a faulty appliance, rather than simply replacing the MCB.

Scalability & Long-Term Value

The S200M series, to which the S202M-C4 belongs, is part of ABB's extensive range of modular devices, offering significant scalability and long-term value. Its compatibility with other ABB System pro M compact devices and accessories, such as auxiliary contacts and surge protective devices, allows for flexible system expansion and enhancement. This modularity enables users to adapt their electrical protection infrastructure as needs evolve, integrating advanced monitoring or signaling capabilities without requiring a complete overhaul. The inherent durability and high performance of the S202M-C4 ensure a long operational lifespan, reducing the total cost of ownership through minimized maintenance and replacement cycles, aligning with modern industrial demands for robust and future-proof electrical solutions.

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Frequently Asked Questions

What is the breaking capacity of the ABB S202M-C4 4A?

The ABB S202M-C4 4A features a substantial breaking capacity of 10 kA according to IEC/EN 60947-2 standards. This high rating ensures it can safely interrupt severe short-circuit currents, protecting the electrical installation. It is designed for applications where higher fault levels are anticipated.

This breaking capacity is crucial for preventing damage to downstream equipment and mitigating fire risks in industrial settings. It signifies the MCB's ability to safely de-energize a circuit during a fault. Proper system design requires this value to exceed the maximum prospective fault current at the point of installation.

Ensuring the MCB's breaking capacity is adequate is a critical safety measure. It provides a reliable safeguard against catastrophic electrical events, contributing to overall system integrity and operational continuity.

What type of loads is the ABB S202M-C4 4A MCB suitable for?

This MCB is specifically designed for circuits with moderate inductive loads, such as motors, transformers, and fluorescent lighting with ballasts. The 'C' curve characteristic allows for inrush currents of 5 to 10 times the rated current before tripping.

This feature prevents nuisance tripping during the initial power-up of inductive devices. It ensures that the MCB only trips on genuine overloads or short circuits, maintaining system reliability. The 4A rating makes it ideal for smaller motor applications.

Therefore, for applications involving equipment that draws a temporary surge of current upon activation, the S202M-C4 provides an optimal balance of protection and operational stability. It safeguards against faults without unnecessarily interrupting normal operation.

Can the ABB S202M-C4 4A be used in residential applications?

While technically capable, the S202M-C4 is primarily engineered for industrial and commercial applications requiring its specific C-curve characteristics and higher breaking capacity. Residential applications typically utilize MCBs with B or C curves and often lower breaking capacities.

Residential circuits usually have lower inrush currents and fault levels compared to industrial settings. Using an industrial-grade MCB in a residential context may be over-specified for standard loads like lighting and small appliances.

However, if a specific residential circuit has inductive loads with significant inrush currents, or if local regulations mandate a higher breaking capacity, the S202M-C4 could be considered. It's always best to consult with a qualified electrician for specific application requirements.