MTL SD32R series Surge Protection Device SPD

The MTL SD32R series Surge Protection Device (SPD) is a high-performance device designed to safeguard electronic equipment and systems from voltage surges.

Here is a detailed introduction to this series of products:

General Characteristics

Wide Voltage Range: The SD32R series is available in multiple voltage ratings, including 7V, 16V, 32V, and 55V, to suit diverse process I/O applications such as thermocouples, 4-20mA instrument loops, shutdown systems, and fire and gas detectors.

High Surge Current Capacity: With a maximum surge current capacity of up to 20KA, it can endure high-energy surges, making it suitable for areas prone to frequent and intense lightning activity.

Low Impedance Design: The low impedance circuit design not only minimizes loop leakage current but also ensures the efficient dissipation of surge currents, thereby enhancing the protection performance.

Compact and Space-Saving: Its ultra-slim design allows for easy installation on a standard DIN rail, facilitating convenient integration into various control cabinets and systems while occupying minimal space.

Multistage Hybrid Protection Circuitry: It uses multistage hybrid protection circuitry to provide more comprehensive surge protection.

Optional 'Loop Disconnect' Facility: This feature allows for commissioning and maintenance to be carried out without the need to remove the surge protection device, which is convenient for operation and reduces downtime.

Technical Parameters

Response Time: The response time is less than 1ns, which means it can quickly respond to voltage surges and start the protection mechanism to minimize the impact on the protected equipment.

Voltage Protection Level: For instance, the SD32R model has a voltage protection level of less than 45V at 1kV/µs and a residual voltage of 30V at 1ns, effectively limiting the transient overvoltage.

Bandwidth: It has a wide bandwidth of 25MHz, which is suitable for protecting communication systems and ensuring the normal operation of high-speed data transmission.

Nominal Current and Series Resistance: The nominal current is 400mA, and the series resistance is 10Ω/line, which are important parameters for evaluating the performance of the SPD.

Installation and Maintenance

Easy Installation: The SD32R series typically 采用 standard DIN rail mounting, which simplifies the installation process and enables quick and convenient installation and replacement.

Convenient Maintenance: Some models are equipped with features such as fuse loop protection and failure indication, making it easier to detect and troubleshoot faults, thereby reducing the maintenance workload and costs.

Application Scenarios

Industrial Automation: It is extensively utilized in industrial automation control systems to safeguard programmable logic controllers (PLCs), distributed control systems (DCSs), frequency converters, and other equipment from voltage surges caused by lightning strikes, power grid fluctuations, and electromagnetic interference.

Power Plants and Substations: In power generation and distribution systems, the SD32R series is employed to protect power transformers, circuit breakers, relays, and other electrical equipment to ensure the stable and reliable operation of the power grid.

Telecommunications and Data Centers: With the continuous development of the information technology industry, SPDs play a vital role in protecting communication equipment such as servers, routers, switches, and optical fibers in data centers and communication stations.