SSR relay RSR72-28A75-H RSR72-28A75-H 1-phase 2615998

Solid State Relay RSR72 – reliable control of AC loads

The RSR72-28A75-H solid state relay from RELPOL is a component designed for efficient and safe control of single-phase loads. The design based on SCR (Silicon Controlled Rectifier) technology ensures trouble-free operation and long life, eliminating typical problems of electromechanical relays related to arcing and mechanical wear. This model is characterized by zero-crossing switching, which minimizes interference in the electrical network and increases safety. The integrated heatsink effectively dissipates heat, allowing operation with higher load currents.

Construction and practical application

The RSR72-28A75-H relay has been designed with a wide range of industrial applications in mind. Its versatility results from the ability to control 240 V AC voltage using a 90…280 V AC control input. This makes it ideal for automation systems, heater control, motors and all kinds of devices requiring precise and reliable switching. The use of zero-crossing switching technology makes the relay particularly recommended for applications sensitive to electromagnetic interference.

• Zero-crossing switching: Minimizes electromagnetic interference and reduces the risk of damage to the load.
• Integrated heatsink: Provides effective heat dissipation, allowing operation with a rated current of 75A at 240V AC.
• Universal control input: Compatible with a wide range of control voltages (90…280 V AC), making it easy to integrate with various control systems.
• Durable construction: The lack of moving parts translates into high resistance to vibration, shock and long device life.
• Mounting on 35mm DIN rail: Enables quick and easy installation in control cabinets and switchboards.

Operating parameters and installation

The RSR72-28A75-H relay is designed for mounting on a standard 35mm DIN rail. When mounting several relays next to each other, it is recommended to maintain a minimum distance of 30 mm to ensure adequate air circulation and effective cooling. It is important to select the correct connection cables, taking into account the load current and environmental conditions. The relay operates stably in an ambient temperature of -30°C to +80°C, making it suitable for use in harsh industrial environments. The IP20 protection class provides basic protection against touch and access to live parts.