Siemens 5SY6150-7CC Heavy Duty High Current Circuit Breaker 1P 50A

The Siemens 5SY6150-7CC is a robust, single-pole miniature circuit breaker designed for high-current applications, offering reliable protection and operational efficiency. Engineered for demanding industrial environments, this 50A breaker boasts superior tripping characteristics and exceptional breaking capacity, ensuring the safety of electrical installations and equipment. Its advanced thermal-magnetic trip unit provides precise overload and short-circuit protection, a critical feature for preventing damage and downtime in critical systems.

Product Specifications

| Feature              | Specification                                  |

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

| Product Type         | Miniature Circuit Breaker                      |

| Poles                | 1P (Single Pole)                               |

| Rated Current (In)   | 50A                                            |

| Breaking Capacity (Icn) | 6 kA (at 230/400V AC)                          |

| Tripping Characteristic| C                                              |

| Voltage Rating       | 230/400V AC                                    |

| Frequency            | 50/60 Hz                                       |

| Insulation Voltage   | 500V                                           |

| Overvoltage Category | III                                            |

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

| Terminal Type        | Screw Terminal                                 |

| Mounting Type        | DIN Rail (35mm)                                |

| Protection Class     | IP20                                           |

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

Core Features & Market Positioning

The Siemens 5SY6150-7CC distinguishes itself through its high breaking capacity of 6 kA, providing a significant safety margin for fault currents in industrial settings. Its Type C tripping characteristic ensures that it can handle moderate inrush currents associated with inductive loads without nuisance tripping, while still offering rapid protection against short circuits. This combination positions the 5SY6150-7CC as a dependable choice for applications requiring robust and reliable circuit protection, differentiating it from lower-capacity or less specialized breakers. Siemens' reputation for quality and durability in industrial electrical components further enhances its market appeal.

Key Application Scenarios

This heavy-duty circuit breaker is ideally suited for protecting individual circuits in industrial power distribution systems, particularly those feeding motors, transformers, or other equipment with high starting currents. Common applications include control panels, machinery power supplies, and sub-distribution boards in manufacturing plants, workshops, and commercial facilities. Its robust design makes it suitable for environments where dust, vibration, or fluctuating electrical loads are prevalent.

Practical System Integration Guidance

Installing the Siemens 5SY6150-7CC requires adherence to standard electrical safety practices. The breaker mounts directly onto a 35mm DIN rail, facilitating quick and secure installation within enclosures. Ensure the incoming power supply is de-energized before wiring. The line conductor should be connected to the upper terminal (marked with a circuit symbol) and the load conductor to the lower terminal. Proper torque should be applied to the screw terminals to ensure a secure connection and prevent overheating. For systems requiring multiple breakers, ensure adequate spacing for ventilation.

Operation and Risk Mitigation

The Siemens 5SY6150-7CC operates automatically, tripping to the "OFF" position when an overcurrent condition (overload or short circuit) is detected. To reset the breaker after a fault, first identify and rectify the cause of the overcurrent. Then, push the toggle lever firmly to the "ON" position. Never force the lever if it does not reset, as this may indicate an underlying issue requiring professional inspection. Avoid operating the breaker in environments exceeding its specified temperature range or with wet conditions to prevent premature failure or electrical shock hazards.

Scalability & Long-Term Value

The 5SY6150-7CC is part of Siemens' extensive range of modular circuit protection devices, allowing for straightforward expansion of electrical panels. It is compatible with other Siemens components within the same product series, ensuring seamless integration into existing or future electrical infrastructure. While not inherently an IIoT device, its reliable performance contributes to the overall stability of systems that can be monitored and controlled digitally. Its durable construction ensures a long service life, providing consistent protection and reducing the need for premature replacement.

Frequently Asked Questions (FAQs)

1. What is the breaking capacity of the Siemens 5SY6150-7CC?

The Siemens 5SY6150-7CC boasts a significant breaking capacity of 6 kA.

This high breaking capacity ensures it can safely interrupt fault currents up to 6,000 amps at rated voltage.

It provides essential protection against severe short circuits in industrial electrical systems.

2. What does the "C" in 5SY6150-7CC signify for tripping characteristics?

The "C" denotes a Type C tripping characteristic, suitable for inductive loads.

This allows for higher inrush currents during motor startups without tripping.

It offers a balance between overload protection and tolerance for transient surges.

3. Can this circuit breaker be used for DC applications?

No, the Siemens 5SY6150-7CC is designed and rated for AC applications only.

Using it on DC circuits can lead to unsafe operation and potential failure.

Always verify the voltage and current type requirements for any circuit protection device.

4. How do I reset the Siemens 5SY6150-7CC after it trips?

First, identify and eliminate the cause of the overload or short circuit.

Then, firmly push the breaker's toggle lever to the "ON" position.

If it trips again immediately, consult an electrician for diagnosis.

5. What is the maximum ambient temperature for operating this breaker?

The Siemens 5SY6150-7CC can operate within an ambient temperature range of -25°C to +55°C.

Operating outside this range can affect its performance and lifespan.

Ensure adequate ventilation in enclosures to maintain optimal operating temperatures.

6. Is the Siemens 5SY6150-7CC suitable for residential use?

While it meets IEC standards, its high current rating and industrial focus make it more common in industrial settings.

For standard residential circuits, lower amperage breakers are typically used.

Its application is best suited for heavy-duty loads in commercial or industrial environments.

7. What type of loads can this 50A breaker protect?

It is ideal for protecting loads with moderate inrush currents, such as motors, transformers, and fluorescent lighting.

The 50A rating is suitable for circuits with substantial power demands.

Ensure the load's continuous current draw does not exceed the breaker's 50A rating.

8. How do I ensure proper installation of the 5SY6150-7CC?

Mount it securely on a 35mm DIN rail within a suitable enclosure.

Connect the line conductor to the upper terminal and load to the lower terminal.

Always de-energize the circuit before performing any wiring.

9. What standards does the Siemens 5SY6150-7CC comply with?

It complies with international standards IEC/EN 60898-1 and IEC/EN 60947-2.

These standards ensure its safety, performance, and reliability.

Compliance signifies adherence to rigorous quality and testing protocols.

10. What is the warranty period for this Siemens circuit breaker?

Warranty information is typically provided by the distributor or seller at the time of purchase.

Siemens generally offers robust warranties on their industrial components.

Refer to your purchase documentation or contact the supplier for specific warranty details.