SSR relay RSR52-48D40 RSR52-48D40 1-phase 2615940

Solid State Relays RSR52 – reliable control of AC loads

Solid State Relays RSR52 Relpol are components designed for efficient and safe control of alternating current loads in industrial applications. They are characterized by zero-crossing switching, which minimizes interference and extends the life of devices. The RSR52-48D40 model, with a 4…32V DC control input, is particularly useful in systems requiring precise control and overvoltage protection.

Construction and application

RSR52 relays use thyristor (SCR) technology to switch the load, ensuring high reliability and resistance to environmental conditions. They are ideal for applications where quiet operation, the absence of mechanical elements susceptible to wear, and high switching frequency are required. A wide range of load voltages (up to 660 V AC) and currents (up to 80 A) allows the relay to be adapted to diverse needs.

These relays are used in many industries, including:

• Control of heaters and electric furnaces
• Industrial lighting
• Control of AC motors
• Plastics processing machinery
• HVAC systems (heating, ventilation, and air conditioning)
• Building automation

Key features and benefits

• Zero-crossing switching: Reduces electromagnetic interference and extends the life of the load and the relay itself.
• High resistance: The absence of moving parts ensures resistance to vibration, shock and extreme operating temperatures (-30…+80°C).
• Wide range of voltages and currents: Enables flexible adaptation to different applications. The RSR52-48D40 model is dedicated to loads with a voltage of 480 V AC and a rated current of 40 A.
• Built-in protection: A varistor (MOV) protects against overvoltages, increasing installation safety.
• Optical isolation: Provides galvanic isolation between the control circuit and the load circuit, increasing safety (dielectric strength input-output: 4 000 Vrms).
• Mounting: Possibility of mounting on heatsinks (recommended for higher currents) or directly on the mounting plate. Dedicated Relpol RH series heatsinks are available.
• LED indicator: A red LED indicates the relay's on state.

The RSR52-48D40 relay is characterized by a load voltage in the range of 48...530 V AC, a control input of 4…32 V DC and a rated load current of 40 A. This is a solid solution for professionals looking for a reliable component to control AC loads in demanding industrial conditions. Its construction ensures long life and minimizes the risk of failure, which translates into savings and increased installation efficiency.