Siemens 5SY6220-8CC Motor Protection Circuit Breaker 2P 20A

The Siemens 5SY6220-8CC is a robust 2-pole, 20A motor protection circuit breaker designed for reliable electrical circuit protection in industrial and commercial applications. This miniature circuit breaker (MCB) offers essential safety features, including overcurrent and short-circuit protection, ensuring the longevity of connected equipment and personnel safety. With a rated voltage of 400V and a breaking capacity of 6kA, the 5SY6220-8CC is engineered to withstand demanding electrical conditions. Its D-type tripping characteristic ensures it can handle motor inrush currents without nuisance tripping, making it a suitable choice for motor control circuits.

Siemens 5SY6220-8CC: Product Specifications

| Feature                 | Specification                          |

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

| Product Number          | 5SY6220-8CC                            |

| Manufacturer            | Siemens                                |

| Type                    | Miniature Circuit Breaker (MCB)        |

| Poles                   | 2P                                     |

| Rated Current           | 20A                                    |

| Rated Voltage           | 400V AC                                |

| Breaking Capacity       | 6kA (IEC/EN 60898)                     |

| Tripping Characteristic | D                                      |

| Installation Type       | DIN rail mounting                      |

| Protection Type         | Overcurrent and Short-Circuit          |

| Terminal Type           | Screw terminals                        |

| Dimensions (H x W x D)  | 90 mm x 36 mm x 76 mm (approx.)        |

| Installation Depth      | 70 mm                                  |

| Degree of Pollution     | 3                                      |

| Overvoltage Category    | III                                    |

Core Features & Market Positioning

The Siemens 5SY6220-8CC distinguishes itself through its reliable "D" type tripping characteristic, a critical feature for motor protection applications. This characteristic allows for higher inrush currents associated with motor startups, preventing false trips while still providing robust protection against sustained overloads and short circuits. As part of Siemens' SENTRON product line, the 5SY6220-8CC benefits from the brand's established reputation for quality, durability, and advanced electrical engineering. Its market positioning centers on providing a dependable, cost-effective solution for safeguarding motors and associated electrical circuits in environments where precise and reliable protection is paramount. This MCB is designed for integrators and electricians seeking a tried-and-tested component for critical power distribution systems.

Key Application Scenarios

The Siemens 5SY6220-8CC is ideally suited for protecting individual motors, pumps, fans, and other inductive loads in various industrial sectors. Its D-curve characteristic makes it particularly effective in applications where high starting currents are expected, such as in manufacturing plants, HVAC systems, and automated production lines. It serves as a vital component in distribution boards and motor control centers (MCCs) for machinery requiring reliable circuit interruption and overload protection. The 2-pole design ensures complete isolation of the circuit, enhancing safety during maintenance. This breaker is a staple in scenarios demanding robust protection against electrical faults that could damage expensive equipment or lead to downtime.

Practical System Integration Guidance

Installation of the Siemens 5SY6220-8CC is facilitated by its standard DIN rail mounting capability, ensuring quick and secure integration into control cabinets and electrical panels. The unit features screw terminals for reliable conductor connections, with recommended tightening torques typically ranging from 2.5 to 3.5 N·m for stranded conductors up to 35 mm². Ensure that the power supply is completely isolated and locked out before commencing installation. Qualified personnel should always follow local electrical codes and best practices during wiring. For optimal performance, verify that the ambient temperature remains within the operational range of -25°C to 55°C. Comprehensive installation details are available in Siemens' official product documentation and installation guides.

Operation and Risk Mitigation

Operating the Siemens 5SY6220-8CC involves straightforward activation and deactivation via its toggle lever. In the event of an overload or short circuit, the breaker will automatically trip, interrupting the power flow. To reset, identify and rectify the fault condition, then manually reset the lever. Risk mitigation is inherent in its design; the tripping mechanism protects against electrical fires and equipment damage. For safety, always ensure the breaker is rated for the circuit's load and fault current. Regular visual inspections for damage or contamination are recommended. While specific fault codes are not applicable to MCBs, a tripped breaker typically indicates an overcurrent or short-circuit event requiring investigation.

Scalability & Long-Term Value

While the Siemens 5SY6220-8CC is a standalone protective device, its value extends through its compatibility with the broader Siemens SENTRON system and other modular low-voltage components. This ensures seamless integration into expanding electrical installations and compatibility with auxiliary devices like remote signaling or monitoring modules, should future needs dictate an upgrade in system intelligence or control. The inherent reliability and durability of Siemens products contribute to long-term operational value by minimizing the need for premature replacements. Its presence in a robust electrical infrastructure supports potential future integrations with smart grid technologies or Industrial IoT (IIoT) platforms, although direct digital communication capabilities are not a feature of this specific model.

Frequently Asked Questions

What is the tripping characteristic of the Siemens 5SY6220-8CC?

The Siemens 5SY6220-8CC features a Type D tripping characteristic. This is crucial for motor applications due to its ability to tolerate high inrush currents. It ensures the breaker doesn't trip during the brief, high current draw when a motor starts.

What is the breaking capacity of the Siemens 5SY6220-8CC?

This circuit breaker has a breaking capacity of 6kA according to EN 60898 standards. This rating indicates the maximum fault current it can safely interrupt. It's important that this capacity exceeds the potential short-circuit current at the installation point.

What are the typical applications for the Siemens 5SY6220-8CC?

It is commonly used for motor protection and in industrial applications. Its Type D curve is ideal for circuits with high inductive loads and motor starting currents. This makes it suitable for machinery and equipment found in manufacturing and automation.

Can the Siemens 5SY6220-8CC be used for AC and DC applications?

The Siemens 5SY6220-8CC is primarily designed for AC applications with a rated voltage of 400V AC. While it has a DC rated value of 60V, its primary function and testing are for AC circuits. Using it in DC circuits requires careful consideration of specific DC protection principles.

How is the Siemens 5SY6220-8CC installed?

Installation involves mounting it on a standard DIN rail within an electrical panel or enclosure. Ensure power is disconnected before installation. The breaker uses screw terminals for connecting load and line wires. Torque specifications for terminals should be followed as per manufacturer guidelines.

What is the maximum conductor size that can be connected to the Siemens 5SY6220-8CC?

The breaker can accommodate solid conductors up to 35 mm² and finely stranded conductors up to 25 mm². Using appropriate ferrules for stranded conductors is recommended. Ensure proper torque is applied to the screw terminals to maintain secure connections.

Does the Siemens 5SY6220-8CC have any built-in communication capabilities?

No, the Siemens 5SY6220-8CC is a standard miniature circuit breaker and does not feature built-in communication protocols for direct digital integration. It functions as a protective device, interrupting circuits under fault conditions.

What is the environmental operating temperature range for this breaker?

The 5SY6220-8CC operates within an ambient temperature range of -25°C to 55°C. It can withstand up to 95% relative humidity at 55°C. Extreme temperatures can affect its performance and tripping characteristics.

Is the Siemens 5SY6220-8CC compliant with RoHS directive?

Yes, this Siemens circuit breaker complies with the substance restrictions according to the RoHS directive. This ensures that hazardous substances are limited in its manufacturing. It also has an EPD (Environmental Product Declaration) available.

What does "2P" signify for the Siemens 5SY6220-8CC?

"2P" indicates that the circuit breaker has two poles. This means it switches and protects two conductors simultaneously, commonly used for single-phase circuits that require complete disconnection of both the live and neutral lines.