Siemens 3RT6026-1AG20 SIRIUS High Voltage Application Contactor 110VAC 25A 3NO

The Siemens 3RT6026-1AG20 SIRIUS high-voltage application contactor is engineered for robust performance in demanding industrial environments. This 110VAC, 25A, 3 normally open (NO) pole contactor offers exceptional reliability and efficiency for critical switching applications. Its core advantages lie in its superior contact material, advanced arc suppression technology, and robust construction, ensuring extended service life and minimal maintenance. Key technical parameters include a rated operational voltage of up to 690V, a control circuit voltage of 110VAC, and a rated operational current of 25A, making it suitable for a wide range of medium to high-power loads.

Siemens 3RT6026-1AG20 Product Specifications

| Feature                  | Specification                                     |

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

| Product Type             | Contactor                                         |

| Series                   | SIRIUS 3RT                                        |

| Rated Operational Voltage | Up to 690 V                                       |

| Rated Operational Current | 25 A                                              |

| Number of NO Poles       | 3                                                 |

| Control Circuit Voltage  | 110 VAC                                           |

| Auxiliary Contacts       | 1 NO                                              |

| Mounting Type            | Rail or Screw Mount                               |

| Protection Class         | IP20                                              |

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

| Standards                | IEC 60947-4-1, IEC 60947-5-1, VDE 0660, EN 60947-4-1 |

Core Features & Market Positioning

The Siemens 3RT6026-1AG20 stands out in the industrial control market due to its sophisticated design, which prioritizes operational safety and energy efficiency. Its SIRIUS line positioning emphasizes durability and plug-and-play integration capabilities, reducing engineering time and costs for system integrators. The contactor's advanced arc quenching system, a hallmark of Siemens' electrical engineering expertise, effectively manages electrical arcs, thereby extending contact life and ensuring safe operation even under frequent switching cycles. This focus on reliability and longevity makes the 3RT6026-1AG20 a preferred choice for applications where downtime is not an option and operational continuity is paramount.

Key Application Scenarios

This Siemens 3RT6026-1AG20 contactor is ideally suited for motor control applications in various industries, including manufacturing, material handling, and building automation. It excels in switching inductive loads, such as motors, transformers, and lighting systems, where reliable power interruption and connection are critical. Common scenarios include starting and stopping three-phase motors, controlling conveyor belts, managing pump systems, and acting as a main switching element in power distribution panels. Its robust design ensures consistent performance across a broad temperature range, making it a versatile solution for diverse operational environments.

Practical System Integration Guidance

Integrating the Siemens 3RT6026-1AG20 into existing control systems is straightforward, leveraging its standardized mounting and connection options. For rail mounting, a standard DIN rail (35mm) is sufficient. Wiring should adhere to local electrical codes and the specific requirements of the controlled load. The 110VAC control coil simplifies integration with common control voltages found in many industrial settings. When connecting to a PLC or other control logic, ensure the output's current and voltage ratings are compatible with the contactor's coil specifications to prevent damage. Proper grounding of the enclosure and associated equipment is essential for safety and system integrity.

Operation and Risk Mitigation

Safe operation of the Siemens 3RT6026-1AG20 relies on adherence to installation guidelines and proper load management. The contactor is designed with inherent safety features, including finger-safe terminals, minimizing the risk of electrical shock during maintenance. Users should ensure the control circuit voltage precisely matches the 110VAC rating to prevent coil damage or erratic operation. Overloading beyond the 25A rating can lead to premature contact wear or failure. In the event of unexpected behavior, such as chattering or failure to energize/de-energize, a thorough inspection of the control circuit wiring, power supply, and the physical condition of the contacts is recommended before re-energizing the system.

Scalability & Long-Term Value

The SIRIUS 3RT contactor platform offers excellent scalability and long-term value, thanks to its compatibility with a wide ecosystem of Siemens industrial components. The 3RT6026-1AG20 can be easily integrated into larger automation systems, including those utilizing Siemens' SIMATIC PLCs and industrial communication networks. Its modular design allows for the addition of auxiliary contact blocks or other accessories to adapt to evolving system requirements. This future-proofing capability, combined with the inherent durability of Siemens products, ensures that investments in this contactor will provide reliable service and support for many years, even as industrial processes become more digitized and interconnected.

Frequently Asked Questions

What is the primary function of the Siemens 3RT6026-1AG20?

The Siemens 3RT6026-1AG20 acts as an electrically operated switch. It is used to control high-power electrical loads, most commonly motors, by making or breaking the power circuit.

This device allows for remote or automated control of machinery. Its 110VAC coil is energized to close the main contacts, allowing current to flow to the load.

The contactor provides a safe and reliable means of switching, preventing direct manual intervention with high-voltage circuits.

How do I wire the Siemens 3RT6026-1AG20 contactor?

Wiring involves connecting the control circuit to the coil terminals (A1 and A2) with the 110VAC supply. Power circuit terminals (typically L1, L2, L3 for input and T1, T2, T3 for output) are connected to the main power lines and the load.

Ensure that incoming power is connected to the top terminals and the load is connected to the bottom terminals for standard operation. Auxiliary contacts, if used, are wired to the control system for signaling purposes.

Always disconnect power before performing any wiring. Consult the product manual for precise terminal identification and recommended wiring practices for your specific application.

What is the maximum load current this Siemens 3RT6026-1AG20 can handle?

The Siemens 3RT6026-1AG20 has a rated operational current of 25A. This rating specifies the maximum continuous current it can safely switch under normal operating conditions.

It's crucial not to exceed this 25A limit to prevent overheating, premature wear, or failure of the contactor's internal components. Factors like ambient temperature and duty cycle can influence the effective current handling capability.

Always verify the actual current draw of your load and consider safety margins when selecting a contactor to ensure reliable and safe operation.

Can the Siemens 3RT6026-1AG20 be used with PLC control?

Yes, the Siemens 3RT6026-1AG20 is designed for integration with PLC (Programmable Logic Controller) systems. The 110VAC control coil is readily compatible with standard PLC output modules or relays.

A PLC output can energize or de-energize the contactor's coil based on programmed logic. This enables automated control of equipment connected to the contactor.

Ensure the PLC output current capability is sufficient to energize the contactor coil and that appropriate isolation or interfacing is used if necessary.

What are the advantages of using a Siemens SIRIUS contactor like the 3RT6026-1AG20?

Siemens SIRIUS contactors are known for their high reliability, long service life, and robust construction. They incorporate advanced features like effective arc suppression for increased safety and component longevity.

The SIRIUS line offers modularity and excellent system integration capabilities. This facilitates easier installation, expansion, and compatibility with other Siemens automation components.

These contactors meet stringent international standards, providing assurance of performance and safety in demanding industrial environments.

What type of auxiliary contacts does the 3RT6026-1AG20 have?

The Siemens 3RT6026-1AG20 contactor typically comes with integrated auxiliary contacts, often one normally open (NO) contact. These are used for control circuit functions, not for switching the main load.

Auxiliary contacts can signal the status of the main contacts to a control system (e.g., PLC). They are valuable for interlocking, feedback, and monitoring purposes within an automation setup.

Additional auxiliary contact blocks can often be added to the front or side of the contactor to increase the number of signaling contacts available.

What is the operational voltage for the coil of the 3RT6026-1AG20?

The coil of the Siemens 3RT6026-1AG20 operates on a control voltage of 110VAC. This is the voltage required to energize the coil and activate the contactor's switching mechanism.

It is critical to supply the correct voltage to the coil terminals (A1 and A2). Using a different voltage can lead to malfunction or permanent damage to the coil.

Always verify the specified coil voltage before connecting power to the control circuit to ensure proper operation.

What is the ambient temperature range for operating the 3RT6026-1AG20?

The Siemens 3RT6026-1AG20 is designed to operate reliably within an ambient temperature range of -25°C to +60°C. This wide range makes it suitable for many industrial environments, including those with extreme temperature fluctuations.

Operating outside this specified temperature range can affect the performance and lifespan of the contactor. Extreme heat can cause components to degrade faster, while extreme cold can impact mechanical operation.

Ensure adequate ventilation around the contactor, especially in enclosed cabinets, to maintain temperatures within the specified operational limits.

What are the main applications for this specific Siemens contactor?

This Siemens 3RT6026-1AG20 contactor is primarily used for switching inductive loads, such as starting and stopping electric motors. It's common in manufacturing, material handling, and HVAC systems.

It serves as a key component in motor control centers (MCCs) and distribution boards. Applications include controlling pumps, fans, compressors, and conveyor systems where robust switching is needed.

Its 25A rating and 3NO pole configuration make it suitable for medium-power applications requiring reliable circuit control.

How does the arc suppression technology in this contactor work?

Siemens SIRIUS contactors, including the 3RT6026-1AG20, utilize various arc suppression methods. These typically involve arc chutes or barriers designed to cool and deionize the arc.

When contacts open under load, an electrical arc forms. The suppression system quickly extinguishes this arc by elongating it and transferring it to a cooler region.

This rapid arc quenching prevents damage to the contact surfaces, extends the contactor's lifespan, and ensures safer operation by minimizing the risk of flashovers.