Siemens 3RT6016-1BB41 Motor Control Contactor with Auxiliary Contact 24VDC 9A 3NO

The Siemens 3RT6016-1BB41 is a compact and reliable 3-pole motor control contactor, featuring a 24VDC coil and a 9A AC-3 rating. This industrial component is designed for demanding applications, offering a robust solution for switching electric motors and other electrical loads. Its integrated auxiliary contact simplifies control circuits, while its S00 size ensures a minimal footprint in control panels. The Siemens 3RT6016-1BB41 provides a dependable and efficient method for motor control and power switching in various industrial settings.

Product Specifications

| Specification                  | Value                                        |

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

| Article Number                 | 3RT6016-1BB41                                |

| Product Brand Name             | SIRIUS                                       |

| Product Designation            | Power Contactor                              |

| Product Type Designation       | 3RT60                                        |

| Size of Contactor              | S00                                          |

| Number of Poles                | 3-Pole                                       |

| Rated Operational Current (AC-3) | 9 A                                          |

| Rated Operational Power (AC-3) | 4 kW (at 400 V)                              |

| Coil Voltage                   | 24V DC                                       |

| Auxiliary Contacts             | 1 NO (Normally Open)                         |

| Electrical Connection          | Screw Terminals                              |

| Mounting Type                  | DIN-35 Rail                                  |

| Operating Temperature          | -25°C to +60°C                               |

| Mechanical Service Life        | 30,000,000 operating cycles (typical)        |

| IP Rating                      | IP20                                         |

| Net Weight                     | 0.280 kg                                     |

| Packaging Dimensions           | 78.00 x 61.50 x 50.00 mm                     |

| Country of Origin              | China                              |

| ETIM Classification            | EC000066                           |

| eClass Classification          | 27-37-10-03                        |

Core Features & Market Positioning

The Siemens 3RT6016-1BB41 distinguishes itself through its robust construction and integration into the comprehensive SIRIUS modular system. This system approach ensures excellent compatibility with other Siemens components, offering a streamlined path for building complete motor feeder solutions. The contactor is designed for high reliability and a long mechanical service life, rated for up to 30 million operating cycles. Its compact S00 size makes it ideal for applications where space is at a premium, a critical factor in modern control panel design. Furthermore, it is built to meet stringent industrial standards, including IEC and UL/CSA approvals, making it suitable for global applications. The inclusion of a pre-integrated auxiliary contact simplifies wiring and reduces the need for additional components, enhancing cost-effectiveness and assembly speed.

Key Application Scenarios

The Siemens 3RT6016-1BB41 finds its primary application in the control of three-phase motors up to 4 kW at 400V (9A AC-3 rating). This makes it exceptionally well-suited for a wide array of industrial machinery, including pumps, fans, compressors, conveyor systems, and general-purpose motor control circuits. Its 24V DC coil voltage is commonly used in control systems for safety and ease of integration with PLC outputs and low-voltage control power supplies. The contactor's reliability and compact size also lend themselves to use in building automation systems, HVAC equipment, and other applications requiring dependable, space-saving motor switching. For applications requiring overload protection, it can be seamlessly integrated with Siemens 3RU21 or 3RB30 overload relays.

Practical System Integration Guidance

Integrating the Siemens 3RT6016-1BB41 into existing or new control systems is straightforward due to its standard mounting and connection options. The contactor is designed for DIN-35 rail mounting, allowing for quick and secure installation within standard electrical enclosures. Its screw terminals provide a reliable connection point for power and control wiring. For applications that necessitate additional control or signaling functions, the integrated normally open (NO) auxiliary contact can be utilized for feedback to PLCs, status indication, or interlocking circuits. The modular nature of the SIRIUS system allows for easy expansion; while this model comes with one NO auxiliary contact, additional auxiliary switches can be retrofitted if needed, enhancing its versatility. When powering the 24V DC coil, ensure the supply is stable and within the specified tolerance to guarantee consistent operation and longevity of the contactor.

Operation and Risk Mitigation

Proper operation of the Siemens 3RT6016-1BB41 is essential for both system performance and safety. Contactors act as the primary switching element, safely disconnecting power to machinery, thus forming a crucial part of safety-related applications. Users should always adhere to wiring diagrams and ensure that the correct voltage is supplied to the coil. Overloading the contactor beyond its AC-3 rating of 9A can lead to premature failure or hazardous conditions. For protection against overloads and short circuits, it is imperative to combine the contactor with appropriate overload relays and circuit breakers, as recommended by Siemens and industry standards. Although specific fault codes are not typically associated with basic contactors, failure to operate usually points to coil issues, contact wear, or improper wiring. In such cases, a thorough inspection and adherence to troubleshooting guides for the SIRIUS system are recommended.

Scalability & Long-Term Value

The Siemens 3RT6016-1BB41 is part of the extensively developed SIRIUS system, which offers significant scalability and long-term value. Its modular design allows for easy expansion of auxiliary contacts and integration with communication modules for advanced diagnostics and IIoT connectivity. This ensures that control systems can evolve to meet future demands without requiring a complete overhaul of the primary switching components. Compatibility with other SIRIUS components, such as overload relays and circuit breakers, provides a unified and efficient approach to motor control solutions. As a standard product, it benefits from Siemens' commitment to backward and forward compatibility within the SIRIUS ecosystem, ensuring that investments in Siemens control gear retain their value over time. This makes the 3RT6016-1BB41 a future-proof component for many industrial automation projects.

Frequently Asked Questions

Q1: What is the primary function of the Siemens 3RT6016-1BB41 contactor?

The Siemens 3RT6016-1BB41 is primarily used to switch electric motors and other inductive loads on and off. It acts as an electrically operated switch, allowing for remote control and automation of industrial processes by safely connecting or disconnecting power circuits. This makes it a fundamental component in motor control systems.

This device is rated for 9A AC-3 duty, suitable for motors up to 4kW at 400V. Its 24VDC coil voltage ensures compatibility with low-voltage control systems and PLCs, enhancing safety and integration flexibility within automated setups.

Its role extends beyond simple on/off switching; it is a critical part of safety interlocks and emergency stop circuits, ensuring machinery can be safely de-energized when needed, thus protecting personnel and equipment.

Q2: What is the coil voltage for the Siemens 3RT6016-1BB41, and why is it important?

The Siemens 3RT6016-1BB41 features a 24V DC coil voltage. This specification is crucial as it dictates the voltage required to energize the contactor's coil, thereby closing the main power contacts.

Using a 24V DC coil is common in industrial automation for safety reasons and compatibility with Programmable Logic Controllers (PLCs). It allows for safe isolation between the high-power motor circuit and the low-voltage control circuit.

Ensuring the correct 24V DC supply is provided to the coil is vital for the contactor's reliable operation. Incorrect voltage can lead to malfunction, premature wear, or complete failure of the contactor.

Q3: What does the "9A" rating mean for the Siemens 3RT6016-1BB41?

The "9A" rating refers to the contactor's capacity to handle a specific current under defined operating conditions, specifically AC-3 motor duty. AC-3 duty is typically associated with starting squirrel-cage motors, where the current is higher and lasts longer than in resistive loads.

This 9A AC-3 rating means the Siemens 3RT6016-1BB41 can reliably switch and maintain contact for motors requiring up to 9 amps during normal operation. It also corresponds to a maximum motor power of 4 kW at 400V.

It is imperative to match the motor's full load amperage (FLA) and starting current requirements to the contactor's rating. Operating the contactor beyond its rated capacity can lead to overheating, contact welding, or premature failure.

Q4: Can the Siemens 3RT6016-1BB41 be used for AC or DC motor control?

The Siemens 3RT6016-1BB41 is primarily designed for AC motor control, specifically rated for AC-3 duty. Its main contacts are intended for switching AC loads.

While the main contacts are for AC applications, the coil operates on 24V DC. This type of contactor is not designed for direct DC motor switching of significant loads, which typically requires contactors with different arc-quenching capabilities.

For AC motor control, ensure the motor's voltage and power requirements align with the contactor's specifications (e.g., 4 kW at 400V). Always consult the product datasheet for precise application guidelines.

Q5: How do I wire the auxiliary contact on the Siemens 3RT6016-1BB41?

The Siemens 3RT6016-1BB41 comes with one integrated normally open (NO) auxiliary contact. This contact is wired into the control circuit, not the main power circuit.

The auxiliary NO contact closes when the main contactor coil is energized, providing a signal for control functions like motor-running indication or interlocks. It's typically wired to a PLC input or a pilot light.

Consult the wiring diagram provided with the contactor or in the product manual for precise terminal designations and connection methods. Incorrect wiring can lead to system malfunctions or safety hazards.

Q6: What is the significance of the "S00" size for this contactor?

The "S00" designation refers to the physical size and power rating category of the Siemens SIRIUS contactor. Size S00 is the smallest standard size within the SIRIUS 3RT2 series.

This compact size makes the 3RT6016-1BB41 ideal for control panels with limited space. It allows for higher component density, reducing the overall footprint of electrical control assemblies.

Despite its small size, the S00 frame size is robust and meets industrial standards for switching motors within its specified power and current ratings. It ensures reliable operation without compromising on space constraints.

Q7: What accessories are compatible with the Siemens 3RT6016-1BB41?

The Siemens 3RT6016-1BB41, being part of the SIRIUS modular system, supports a range of compatible accessories. These can include overload relays for motor protection and additional auxiliary switch blocks.

Siemens offers specific overload relays like the 3RU21 and 3RB30 series that are designed to mount directly onto the 3RT6016-1BB41, providing integrated motor protection. Additional auxiliary switches can be added to expand signaling capabilities.

While this model comes with a built-in NO auxiliary contact, further expansion is possible. Refer to Siemens' SIRIUS catalog or datasheets for the exact compatibility of accessory part numbers with the 3RT6016-1BB41.

Q8: How does the 3RT6016-1BB41 differ from other Siemens contactors like the 3RT1016-1BB41?

The 3RT6016-1BB41 is part of the newer SIRIUS 3RT2 series, representing an evolution from the older 3RT1 series, which includes models like the 3RT1016-1BB41. The 3RT2 series generally offers improvements in design, performance, and integration capabilities.

Successor models like the 3RT2016-1BB41 often feature enhanced reliability, updated compliance with the latest industrial standards, and potentially improved energy efficiency compared to their predecessors. Some accessories might also be redesigned.

When replacing an older model, such as the 3RT1016-1BB41, it's crucial to verify accessory compatibility. While some accessories may be interchangeable, others might require updates due to design changes between the 3RT1 and 3RT2 series.

Q9: What is the typical lifespan or duty cycle of the Siemens 3RT6016-1BB41?

The Siemens 3RT6016-1BB41 is rated for a significant mechanical service life, typically around 30 million operating cycles. This metric refers to the number of times the contactor can open and close its contacts without mechanical failure.

Electrical service life depends heavily on the application's load type and switching frequency. For AC-3 motor duty, the electrical endurance is significantly lower than the mechanical rating, often in the range of 1 to 2 million cycles, depending on the specific operating conditions.

To maximize lifespan, it's crucial to operate the contactor within its specified ratings (9A AC-3) and to use appropriate motor protection devices to prevent overloads and short circuits, which can drastically reduce electrical endurance.

Q10: Where can I find the datasheet or technical documentation for the Siemens 3RT6016-1BB41?

The most comprehensive technical documentation, including detailed specifications, wiring diagrams, and application notes for the Siemens 3RT6016-1BB41, can be found on the Siemens official website, often through their SiePortal platform.

Many authorized distributors and electrical component suppliers also provide downloadable datasheets on their product pages. Websites like Electrical.com, RS Components, and IMC-Direct often list these resources for the 3RT6016-1BB41.

You can also find links to datasheets on various industrial automation and component marketplaces. Searching for "Siemens 3RT6016-1BB41 datasheet PDF" will usually yield direct links to these official documents.