MTL SD55R series Surge Protection Device SPD

The MTL SD55R series Surge Protection Device (SPD) is a high - performance surge protection product designed to meet the needs of various industrial and electronic equipment. Here is a detailed introduction:

Product Features

High Surge Current Capacity: The SD55R series can handle high - energy surges, with a maximum surge current capacity of up to 20kA. This enables it to effectively protect equipment from severe voltage surges caused by lightning strikes, power grid fluctuations, and other factors.

Fast Response Time: It has an extremely fast response time of less than 1ns. This allows the SPD to quickly detect and respond to voltage surges, promptly triggering the protection mechanism to minimize potential damage to the protected equipment.

Wide Voltage Range: With a nominal voltage of 55V, it is suitable for a variety of applications operating at this voltage level. It can provide reliable protection for different types of industrial equipment and electrical circuits within this voltage range.

Low Capacitance Design: The low - capacitance design helps to reduce the impact on the signal integrity of the circuits being protected. This is particularly important in applications where signal quality is crucial, such as in communication systems and high - speed data - processing equipment.

Compact and Rugged Enclosure: Housed in a compact and durable enclosure, the SD55R series is designed to withstand harsh industrial environments. It is suitable for DIN - rail mounting, which facilitates easy installation and integration into existing electrical control cabinets and systems.

Technical Specifications

Voltage Protection Level: The voltage protection level of the SD55R series is typically less than 80V at 1kV/μs. This means that when a voltage surge occurs, the SPD can effectively limit the voltage to a safe level to protect the connected equipment.

Residual Voltage: Under surge conditions, the residual voltage is relatively low, around 60V at 1ns. This low residual voltage helps to further protect the equipment from excessive voltage stress and reduces the risk of damage.

Bandwidth: It offers a wide bandwidth, usually up to 25MHz or more. This wide bandwidth allows the SPD to handle high - frequency signals without significant attenuation or distortion, ensuring the normal operation of high - speed data - transmission systems.

Nominal Current and Series Resistance: The nominal current rating of the SD55R series is suitable for typical industrial load requirements. The series resistance is designed to be low enough to minimize power losses while still providing effective surge protection.

Application Scenarios

Industrial Automation Systems: In industrial automation, the SD55R series is widely used to protect programmable logic controllers (PLCs), distributed control systems (DCSs), sensors, and actuators. It helps to ensure the stable operation of these devices in the face of electrical disturbances, reducing the risk of system failures and downtime.

Power Generation and Distribution: In power plants and substations, the SD55R series is used to protect power transformers, circuit breakers, relays, and other electrical equipment. It can effectively suppress voltage surges caused by lightning strikes and switching operations, improving the reliability and safety of the power grid.

Telecommunications and Data Centers: Given its excellent performance in signal protection, the SD55R series is suitable for protecting telecommunications equipment such as servers, routers, switches, and optical fiber communication devices in data centers. It helps to ensure the integrity of data transmission and the continuous operation of communication networks.