Siemens 3RT2017-1AP01 High Current AC Contactor 230VAC 12A 3NO

The Siemens 3RT2017-1AP01 is a high-performance AC contactor engineered for demanding industrial applications. This robust device, operating at 230VAC with a 12A rating and featuring 3 normally open (NO) contacts, offers exceptional reliability and efficiency in power switching scenarios. Its compact design, advanced switching technology, and adherence to stringent safety standards make it a cornerstone for control systems across various sectors.

Product Specifications

| Feature               | Specification                               |

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

| Product Type          | Power Contactor                             |

| Manufacturer          | Siemens                                     |

| Series                | SIRIUS 3RT2                                 |

| Model Number          | 3RT2017-1AP01                               |

| Coil Voltage          | 230 VAC                                     |

| Conventional Thermal Current (Ith) | 40 A (AC-1)                                 |

| Rated Operational Current (Ie) | 12 A (AC-3 at 400V)                         |

| Number of NO Contacts | 3                                           |

| Number of NC Contacts | 0                                           |

| Control Circuit Type  | AC                                          |

| Auxiliary Contacts    | None standard (can be added)                |

| Mounting Type         | DIN rail or screw mounting                  |

| Degree of Protection  | IP20                                        |

| Terminal Type         | Spring-loaded terminals (for control)       |

| Dimensions (H x W x D) | Approx. 57.5 mm x 45 mm x 84 mm             |

| Standard             | IEC 60947, EN 60947                      |

Core Features & Market Positioning

The Siemens 3RT2017-1AP01 distinguishes itself through its high switching capacity and compact footprint, ideal for control cabinets with limited space. Its SIRIUS 3RT2 series designation signifies integration into a broader, interoperable range of industrial control and protection devices, allowing for streamlined system design. The contactor's robust construction ensures a long operational lifespan, minimizing downtime and maintenance costs, a critical factor for industrial operations. Its reliable performance in switching motor loads up to AC-3 category further cements its position as a trusted component in automation solutions.

Key Application Scenarios

This 12A AC contactor is extensively utilized in motor control applications, including starting, stopping, and reversing three-phase motors in machinery, pumps, fans, and conveyors. It serves as a primary switching element in building automation systems for HVAC controls and lighting circuits requiring higher current handling. In industrial manufacturing, it's deployed in power distribution boards and control panels for various production line equipment. The 3RT2017-1AP01 is particularly well-suited for applications where precise and reliable switching of electrical loads up to its rated capacity is paramount.

Practical System Integration Guidance

Integrating the Siemens 3RT2017-1AP01 typically involves direct wiring to the motor circuit and connection of the 230VAC coil to the control signal. For motor control, it's essential to pair the contactor with appropriate overload relays (e.g., Siemens 3RU or 3RB series) for motor protection, wired in series with the power circuit and connected to the auxiliary contacts of the contactor. Installation on a standard 35mm DIN rail is straightforward, or it can be mounted using screws. Ensure the coil voltage (230VAC) matches the control power supply. Proper cable sizing and termination within the spring-loaded terminals are critical for safe and reliable operation.

Operation and Risk Mitigation

The Siemens 3RT2017-1AP01 operates by using the 230VAC coil energization to create a magnetic field that closes the main contacts, thereby switching the load circuit. De-energizing the coil deactivates the magnetic field, and a spring mechanism opens the contacts. To mitigate risks, always ensure the power supply is de-energized before performing any wiring or maintenance. Use appropriate personal protective equipment (PPE) and follow local electrical codes. Overload protection, essential for motor applications, must be correctly sized and integrated to prevent thermal damage and potential fire hazards. Regular inspection of contacts for wear and proper connection tightness is also recommended.

Scalability & Long-Term Value

The SIRIUS 3RT2 series, including the 3RT2017-1AP01, offers excellent scalability and long-term value. These contactors are designed to be part of the broader Siemens SIRIUS modular system, allowing for easy expansion with auxiliary contact blocks, surge suppressors, and other accessories. This compatibility ensures that control systems can be adapted to evolving requirements without needing a complete overhaul. Furthermore, the robust design and high-quality components contribute to a prolonged service life, reducing the total cost of ownership. Integration into modern digital industrial environments is facilitated by Siemens' broader automation portfolio, enabling connectivity and data exchange for IIoT applications when combined with appropriate gateways and software solutions.

Frequently Asked Questions

Q1: What is the maximum load capacity of the Siemens 3RT2017-1AP01?

The Siemens 3RT2017-1AP01 is rated for 12 Amps under AC-3 utilization category at 400V. This rating is crucial for switching motor loads, indicating its capability to handle starting currents. For non-inductive loads (AC-1 category), its conventional thermal current is rated at 40 Amps. This broader capacity allows for flexibility in certain industrial switching tasks.

Q2: Can I use the Siemens 3RT2017-1AP01 for DC loads?

This contactor is specifically designed for AC circuits, with a 230VAC coil. It is not intended or rated for switching direct current (DC) loads. Using it for DC applications can lead to contact welding and failure due to arc characteristics. Always use contactors designed for the specific voltage type of the load.

Q3: What type of overload protection should I use with the 3RT2017-1AP01?

Siemens recommends pairing this contactor with compatible overload relays from their SIRIUS range, such as the 3RU or 3RB series. These relays connect in series with the power circuit and communicate with the contactor via its auxiliary contacts. Proper sizing of the overload relay to match the motor's full load current is essential for effective protection.

Q4: How do I wire the coil for the Siemens 3RT2017-1AP01?

The coil operates on 230VAC. Connect one wire of the 230VAC control supply to one terminal of the coil (typically A1) and the other wire to the other coil terminal (typically A2). Ensure the control voltage precisely matches the coil's rating to prevent damage or malfunction. Verify the control circuit is de-energized before wiring.

Q5: What are the dimensions of the Siemens 3RT2017-1AP01?

The contactor has a compact design, measuring approximately 57.5 mm in height, 45 mm in width, and 84 mm in depth. This compact form factor is advantageous for installations in control cabinets with limited space. It allows for high power density within control panel designs.

Q6: Does the Siemens 3RT2017-1AP01 come with auxiliary contacts?

The base Siemens 3RT2017-1AP01 model typically does not include pre-installed auxiliary contacts. However, auxiliary contact blocks (both NO and NC) can be easily attached to the front or side of the contactor. This modularity allows for flexible integration into control logic and signaling circuits.

Q7: What is the IP rating of this contactor?

The Siemens 3RT2017-1AP01 has an IP20 degree of protection. This rating signifies that it is protected against solid objects greater than 12.5 mm, such as fingers, but is not protected against water ingress. It is suitable for indoor use within control cabinets or enclosures.

Q8: Can this contactor be used for frequent switching cycles?

Yes, the SIRIUS 3RT2 series contactors are designed for high electrical endurance and are suitable for applications with frequent switching cycles. Their robust construction and high-quality materials ensure reliability over a long operational life. Proper application sizing is key to maximizing service life.

Q9: How do I mount the Siemens 3RT2017-1AP01?

The contactor can be mounted on a standard 35mm DIN rail for quick and secure installation. Alternatively, it can be mounted using screws directly onto a panel or enclosure surface. Ensure the mounting surface is flat and provides adequate support for the device.

Q10: What is the significance of the "3NO" in the product name?

The "3NO" indicates that the contactor features three normally open (NO) main contacts. These contacts are closed when the coil is energized and open when the coil is de-energized. This configuration is standard for basic motor control (starting/stopping) and switching loads.