Siemens 3RT6916-1DG00 DC Coil Suppressor Protection

The Siemens 3RT6916-1DG00 DC Coil Suppressor Protection module offers essential safeguarding for contactor coils, preventing detrimental voltage spikes during de-energization. This crucial accessory extends the operational lifespan of Siemens contactors and associated control circuitry by effectively clamping transient overvoltages. Its compact design and straightforward integration make it a vital component for enhancing the reliability of industrial automation systems. Key technical parameters include suitability for DC coil voltages up to 220V, a response time of less than 25 ms, and a compact module size.

| Feature                        | Specification              |

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

| Product Type                   | Coil Protection Module     |

| Intended Use                   | DC Coil Suppression        |

| Max DC Coil Voltage            | 220V                       |

| Response Time                  | < 25 ms                    |

| Protection Mechanism           | varistor                   |

| Mounting Type                  | Direct mounting on contactor |

| Dimensions (H x W x D)         | Varies by contactor size   |

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

| Protection Against             | Voltage Transients         |

The 3RT6916-1DG00 differentiates itself through its inherent Siemens quality and seamless compatibility with their 3RT contactor series. This integrated approach ensures robust protection without compromising control circuit performance. Its varistor-based technology provides rapid and effective suppression of inductive voltage spikes generated when a DC coil is switched off. This reliability positions it as a preferred choice for engineers seeking to minimize downtime and protect sensitive control components in demanding industrial environments.

Key application scenarios for the Siemens 3RT6916-1DG00 DC Coil Suppressor Protection include its use in manufacturing plants, process control systems, and building automation, wherever Siemens 3RT contactors are employed for motor control, lighting, or general switching duties. It is particularly critical in applications with frequent switching cycles where the cumulative effect of voltage transients can degrade coil insulation and reduce contactor lifespan. Typical uses involve protecting control circuits in material handling equipment, HVAC systems, and conveyor belts.

Practical system integration is exceptionally straightforward. The 3RT6916-1DG00 is designed for direct attachment to compatible Siemens 3RT contactors, often clipping onto the front or side of the contactor body. No complex wiring or programming is typically required; it connects directly across the coil terminals. This plug-and-play functionality minimizes installation time and reduces the potential for wiring errors, ensuring a rapid and reliable setup.

Operation of the 3RT6916-1DG00 is passive, activated only during coil de-energization. The varistor within the module presents a high impedance under normal operating conditions, thus having no impact on the coil's function. When a rapid voltage surge occurs due to the collapse of the magnetic field in the de-energized coil, the varistor's impedance drops significantly, diverting the transient energy and clamping the voltage to a safe level. This proactive suppression prevents damage to solid-state control devices and extends the life of the contactor coil itself.

Scalability and long-term value are inherent in the Siemens ecosystem. The 3RT6916-1DG00 is compatible with a wide range of Siemens 3RT contactors, allowing for easy retrofitting and standardization across different control panels. Its robust design contributes to the overall longevity of the control system, reducing maintenance requirements and associated costs. Integration with broader Siemens automation platforms, such as SIMATIC PLCs, further enhances the system's diagnostic capabilities and potential for future digital enhancements.

FAQs

What is the primary function of the Siemens 3RT6916-1DG00?

It acts as a voltage surge suppressor for DC contactor coils.

It protects sensitive control circuits from damaging voltage spikes.

This device extends the lifespan of contactors by mitigating transients.

How is the 3RT6916-1DG00 installed on a Siemens contactor?

Installation is typically a simple clip-on or direct mounting process.

It connects directly across the terminals of the DC contactor coil.

No complex wiring or programming is usually required for setup.

What types of voltage transients does this module protect against?

It specifically suppresses transients generated by inductive DC coil de-energization.

These are caused by the rapid collapse of the magnetic field when power is removed.

The varistor technology effectively clamps these harmful voltage spikes.

What is the maximum DC coil voltage this suppressor can handle?

The 3RT6916-1DG00 is designed for DC coil voltages up to 220V.

It is crucial to ensure the contactor coil voltage does not exceed this limit.

Using it with higher voltages can lead to module failure or inadequate protection.

What is the response time of the 3RT6916-1DG00?

The module features a rapid response time of less than 25 milliseconds.

This quick reaction is essential for effective transient voltage suppression.

Fast response minimizes the duration of potentially damaging voltage spikes.

Can this coil suppressor be used with AC contactor coils?

No, the 3RT6916-1DG00 is specifically designed for DC coils only.

Using it on AC coils will not provide proper protection and may cause damage.

Always verify the coil type before selecting and installing a suppressor.

What are the benefits of using a coil suppressor like the 3RT6916-1DG00?

It significantly reduces wear and tear on the contactor coil and its insulation.

It protects downstream electronic components, such as PLC outputs, from overvoltage.

Overall system reliability and operational uptime are greatly improved.

Is the 3RT6916-1DG00 compatible with all Siemens 3RT contactors?

It is designed for compatibility with specific Siemens 3RT contactor series.

Always check the product datasheet for exact compatibility listings.

Proper selection ensures optimal performance and protection.

What technology does the Siemens 3RT6916-1DG00 use for suppression?

This module utilizes varistor technology for voltage transient clamping.

Varistors offer a fast response and effective suppression of voltage spikes.

They are a common and reliable component for this type of protection.

Where are these coil suppressor modules typically used in industrial settings?

They are commonly found in motor control circuits and automated machinery.

Applications include manufacturing, material handling, and process automation.

Anywhere frequent switching of DC coils occurs is a prime use case.