Siemens 3RT5064-6AP36 Motor Control AC Contactor 220-240VAC/DC 225A 3NO

The Siemens 3RT5064-6AP36 is a robust AC contactor engineered for demanding industrial applications, offering reliable motor control and exceptional performance. This IEC-compliant device boasts a high switching capacity of 225A, a versatile 220-240VAC/DC coil voltage, and three normally open (NO) poles, making it a cornerstone for managing critical power circuits. Its advanced design prioritizes operational efficiency, safety, and seamless integration into complex automation systems, solidifying its position as a preferred choice for engineers and system integrators seeking dependable motor control solutions.

Product Specifications

| Feature             | Specification                                   |

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

| Product Type        | Motor Control Contactor                         |

| Manufacturer        | Siemens                                         |

| Model Number        | 3RT5064-6AP36                                   |

| Rated Operational Current (AC-3, 400V) | 225 A                                           |

| Number of NO Poles  | 3                                               |

| Coil Voltage (AC/DC) | 220-240 VAC/DC                                  |

| Control Circuit Type | AC/DC                                           |

| Auxiliary Contacts  | 2 NO + 2 NC (Standard Configuration)            |

| Mounting Type       | Screw Terminal, DIN Rail                        |

| Protection Class    | IP20                                            |

| Standards Compliance | IEC 60947-4-1, IEC 60947-5-1, UL, CSA            |

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

| Dimensions (H x W x D) | 145 mm x 90 mm x 148 mm                         |

Core Features & Market Positioning

The Siemens 3RT5064-6AP36 distinguishes itself through its superior thermal current rating and robust construction, designed for extended operational life even under severe industrial conditions. Its broad coil voltage range (220-240VAC/DC) offers significant flexibility in global installations and allows for simplified inventory management by accommodating various supply types. This contactor is positioned as a high-reliability component within Siemens' comprehensive SIRIUS modular system, ensuring excellent compatibility and integration with other Siemens protection and control devices. This modularity and inherent reliability make it a competitive offering against other industrial contactors, particularly in applications demanding high uptime and reduced maintenance.

Key Application Scenarios

This contactor finds extensive use in direct-on-line (DOL) starting of medium to large three-phase induction motors across various industries, including manufacturing, water treatment, and material handling. It is ideal for controlling pumps, fans, compressors, and conveyors where consistent and powerful motor switching is paramount. The 3RT5064-6AP36 is also well-suited for main switch applications, power distribution, and capacitor bank switching, demonstrating its versatility beyond standard motor control. Its ability to handle high currents efficiently makes it a vital component in safeguarding and managing electrical loads in demanding environments.

Practical System Integration Guidance

Integrating the Siemens 3RT5064-6AP36 into existing control panels is streamlined due to its standard DIN rail mounting and screw terminal connections, facilitating quick installation and wiring. When connecting the main power circuits, ensure appropriate cable cross-sections are used according to the 225A rating and local electrical codes to prevent overheating. For the control circuit, the 220-240VAC/DC coil can be powered from a stable DC or AC supply. Accurate wiring of the auxiliary contacts is crucial for interlocking, signaling, and integration with PLC systems for status monitoring and advanced control logic. Proper grounding of the contactor and connected equipment is essential for electrical safety.

Operation and Risk Mitigation

Safe operation of the Siemens 3RT5064-6AP36 requires adherence to electrical safety standards. Always de-energize the power circuit and control circuit before performing any maintenance, inspection, or wiring. Ensure the contactor is correctly sized for the motor load and operating conditions to prevent premature wear or failure. Overheating is a primary risk; monitor for signs of excessive heat during operation, which could indicate undersizing, voltage issues, or internal contact problems. Regular visual inspection of contacts and terminals for signs of arcing, corrosion, or looseness is recommended. Implementing appropriate overcurrent protection, such as fuses or circuit breakers, in conjunction with the contactor is critical for mitigating electrical faults and protecting both the equipment and personnel.

Scalability & Long-Term Value

The Siemens 3RT5064-6AP36 is part of the extensive SIRIUS innovation line, designed for scalability and future-proofing. Its compatibility with a wide range of SIRIUS accessories, including overload relays, surge suppressors, and communication modules, allows for system expansion and enhanced functionality. This enables easy upgrades for advanced diagnostics, remote monitoring, and integration into Industry 4.0 environments via communication gateways. The inherent durability and Siemens' commitment to product longevity ensure that this contactor provides a stable and reliable foundation for evolving automation strategies, offering significant long-term value and minimizing the need for frequent replacements.

Frequently Asked Questions (FAQs)

1. What is the primary function of the Siemens 3RT5064-6AP36?

It serves as a high-capacity AC contactor for robust motor control applications.

Its main role is to switch high electrical loads, primarily three-phase motors, on and off safely and reliably.

This device is essential for automating and protecting industrial machinery in various sectors.

2. Can the Siemens 3RT5064-6AP36 be used with both AC and DC power supplies for its coil?

Yes, the 3RT5064-6AP36 features a versatile 220-240VAC/DC coil.

This dual-voltage capability simplifies installation in systems with different control voltage sources.

It allows for flexible integration into existing infrastructure or new designs without requiring voltage converters for the coil.

3. What is the rated operational current for this Siemens contactor?

The contactor is rated for 225 Amperes under AC-3 load conditions.

This high current rating makes it suitable for direct switching of medium to large industrial motors.

Ensuring the motor's operating current does not exceed this rating is crucial for longevity.

4. How do I correctly wire the Siemens 3RT5064-6AP36 for motor control?

Connect the main power lines (L1, L2, L3) to the power terminals of the contactor.

Wire the motor leads to the load terminals (T1, T2, T3) on the contactor.

Control the coil voltage (A1, A2) with a separate circuit to energize and de-energize the contactor for switching.

5. What are the advantages of using the Siemens 3RT5064-6AP36 over other contactors?

It offers a high thermal current rating and robust construction for extended lifespan.

Its SIRIUS modularity ensures excellent compatibility with other Siemens control and protection components.

The 220-240VAC/DC coil provides significant application flexibility and inventory simplification.

6. What safety precautions should be taken when installing and operating this contactor?

Always de-energize all power sources before installation or maintenance.

Ensure proper grounding of the contactor and associated equipment for electrical safety.

Use correctly sized conductors and adequate overcurrent protection (fuses/breakers) for the application.

7. What type of applications is the Siemens 3RT5064-6AP36 best suited for?

It is ideal for DOL starting of medium to large three-phase induction motors.

Common uses include controlling pumps, fans, compressors, and conveyor systems.

It can also function as a main switch or for capacitor bank switching in industrial settings.

8. Does this contactor have auxiliary contacts for control circuits?

Yes, the standard configuration typically includes 2 normally open (NO) and 2 normally closed (NC) auxiliary contacts.

These auxiliary contacts are vital for interlocking, signaling motor status, and integration with PLC systems.

They allow for external monitoring and control logic based on the contactor's operational state.

9. What are the mounting options for the Siemens 3RT5064-6AP36?

This contactor can be mounted using screw terminals directly onto a mounting plate.

It also supports standard 35mm DIN rail mounting for quick and secure installation in control cabinets.

Both methods offer reliable and secure physical integration into control panel designs.

10. How does the 3RT5064-6AP36 integrate with Industry 4.0 or IIoT initiatives?

It can be paired with Siemens communication modules or gateways for digital connectivity.

This integration enables remote monitoring, diagnostics, and data acquisition for predictive maintenance.

Its robust design and modularity make it a foundational component for smart manufacturing systems.