Siemens 5SN6310-7CN Miniature Circuit Breaker (MCB) 3P 10A

The Siemens 5SN6310-7CN Miniature Circuit Breaker (MCB) is a robust 3-pole, 10-ampere protection device engineered for demanding industrial and commercial electrical installations. This MCB offers superior circuit protection, enhanced safety, and reliable operational continuity, making it a cornerstone for safeguarding electrical systems against overcurrents and short circuits. Its core advantages lie in its high breaking capacity, thermal-magnetic tripping mechanism, and compliance with stringent international standards. Key technical parameters include a rated voltage of 400V AC, a tripping characteristic of type B, and a rated frequency of 50/60 Hz, ensuring dependable performance across diverse power environments.

Product Specifications

| Specification        | Value                                     |

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

| Product Type         | Miniature Circuit Breaker (MCB)           |

| Manufacturer         | Siemens                                   |

| Model Number         | 5SN6310-7CN                               |

| Number of Poles      | 3P (3-pole)                               |

| Rated Current (In)   | 10A                                       |

| Rated Voltage (Ue)   | 400V AC                                   |

| Rated Frequency      | 50/60 Hz                                  |

| Tripping Characteristic | Type B                                    |

| Breaking Capacity (Icn) | 6kA                                       |

| Degree of Protection | IP20                                      |

| Operating Temperature| -25°C to +45°C                            |

| Terminal Type        | Screw terminals                           |

| Mounting             | DIN rail (35mm)                           |

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

Core Features & Market Positioning

The Siemens 5SN6310-7CN distinguishes itself through its precision-engineered thermal-magnetic tripping mechanism, which ensures prompt and reliable disconnection under fault conditions. Its robust construction and high breaking capacity of 6kA provide a critical safety margin, protecting downstream equipment from severe damage during short circuits. Positioned as a high-value, dependable circuit protection solution, this MCB is favored in installations where consistent performance and adherence to safety regulations are paramount. Siemens' reputation for quality and innovation further solidifies its market standing as a trusted provider of industrial electrical components.

Key Application Scenarios

This 3-pole, 10A MCB is ideally suited for protecting electrical circuits in industrial machinery, control panels, power distribution boards, and commercial buildings. Its Type B tripping curve makes it suitable for circuits with low inrush currents, such as lighting and socket outlets, as well as for general-purpose power distribution. The 3-pole configuration is essential for safeguarding three-phase loads, including motors and pumps, ensuring complete disconnection from the power supply in the event of an overload or short circuit on any phase. It is a staple in factory automation, building services, and utility distribution networks.

Practical System Integration Guidance

Installation of the Siemens 5SN6310-7CN MCB is straightforward, designed for quick mounting onto a standard 35mm DIN rail. Ensure that the incoming power supply is safely disconnected before commencing any wiring. Connect the line conductors to the upper terminals and the load conductors to the lower terminals. For 3-pole applications, ensure all three poles are utilized for complete circuit protection. Terminals are designed for screw connections; verify that conductors are properly stripped and secured to prevent loose connections, which can cause overheating and potential hazards. Always adhere to local electrical codes and standards during installation.

Operation and Risk Mitigation

The Siemens 5SN6310-7CN operates automatically, interrupting the circuit when the current exceeds predetermined safe levels due to overloads or short circuits. The thermal element responds to sustained overloads, while the magnetic element reacts instantaneously to high fault currents. To mitigate risks, regularly inspect the MCB for any signs of damage or overheating. Avoid overloading circuits beyond the MCB's 10A rating. In case of frequent tripping, investigate the cause of the overload or fault, rather than simply resetting the breaker. Ensure proper ventilation around the MCB to prevent overheating.

Scalability & Long-Term Value

The 5SN6310-7CN MCB is part of Siemens' extensive electrical protection portfolio, offering excellent compatibility with other Siemens circuit protection devices, busbars, and enclosures. This ensures seamless integration into existing or future electrical infrastructure, facilitating system upgrades and expansions. While this specific model is designed for direct protection, its robust design and adherence to international standards mean it provides long-term reliable service, reducing the need for premature replacement. Its compatibility within the Siemens ecosystem supports planned scalability for evolving industrial needs.

Frequently Asked Questions

What is the tripping characteristic of the Siemens 5SN6310-7CN MCB?

The Siemens 5SN6310-7CN MCB features a Type B tripping characteristic.

This means it is designed to trip at 3 to 5 times its rated current.

Type B is typically used for circuits with low inrush currents like lighting.

What is the breaking capacity of the 5SN6310-7CN MCB?

This MCB has a breaking capacity of 6kA.

This is the maximum fault current it can safely interrupt.

A 6kA rating is suitable for many standard industrial applications.

Can the Siemens 5SN6310-7CN be used for single-phase applications?

Yes, although it is a 3-pole device, it can protect single-phase circuits.

You would use two poles for a single-phase application needing neutral interruption.

However, its primary design is for 3-phase load protection.

What are the physical dimensions of this MCB?

Specific dimensions can vary slightly by exact model revision.

It is designed to fit standard 35mm DIN rail mountings.

The width is typically around 52.5 mm for a 3-pole unit.

Is the Siemens 5SN6310-7CN suitable for DC circuits?

This MCB is primarily designed for AC circuits.

DC circuit protection requires different characteristics and ratings.

Always consult the manufacturer's datasheet for DC application suitability.

How do I install the Siemens 5SN6310-7CN MCB?

Mount it securely onto a 35mm DIN rail.

Connect line conductors to the top and load to the bottom terminals.

Ensure all connections are tight and comply with local codes.

What is the operating temperature range for this MCB?

The operating temperature range is from -25°C to +45°C.

Environmental factors can affect breaker performance.

Avoid exposing it to temperatures outside this range for optimal function.

What does 3P 10A mean in the product name?

3P signifies that it is a 3-pole circuit breaker.

10A indicates its rated current capacity is 10 amperes.

This configuration is ideal for protecting three-phase equipment.

Where is this MCB commonly used in industrial settings?

It's used in control panels and distribution boards.

Applications include protecting motors and power circuits.

It's a standard component in factory automation systems.

How does the thermal-magnetic tripping work?

The thermal element protects against overloads.

The magnetic element protects against short circuits.

Together, they offer comprehensive overcurrent protection.