Siemens SIRIUS 3RQ4 Plug-In Coupling Relay, 230 V AC/DC, 3 NO + 1 NC, Screw Terminals

The Siemens SIRIUS 3RQ4 Plug-In Coupling Relay (3RQ4118-1AF00) is a high-performance coupling relay designed for reliable switching and signal isolation in industrial control systems. With a coil voltage of 230 V AC/DC and forcibly guided contacts, it ensures safe and precise operation in safety-critical applications. The screw terminal connection and DIN rail mounting facilitate easy installation and maintenance.

Advantages

This coupling relay offers high switching capacity, long electrical and mechanical endurance, and compliance with international standards (CE, UL, CSA, CCC). Its compact design saves space on the DIN rail, while the forcibly guided contacts provide enhanced safety by ensuring that NO and NC contacts cannot be closed simultaneously.

Suitable for

• Industrial automation and control panels
• Safety circuits requiring forcibly guided contacts
• Signal isolation and switching in PLC and DCS systems
• Motor control and power distribution

Key specifications

• Product Type: Coupling Relay
• Series: SIRIUS 3RQ4
• Coil Voltage: 230 V AC/DC
• Contact Configuration: 3 NO (Normally Open) + 1 NC (Normally Closed)
• Contact Type: Forcibly Guided Contacts
• Connection Type: Screw Terminals
• Mounting Type: DIN Rail
• Rated Operational Current (AC-15): 3 A at 230 V AC
• Rated Operational Current (DC-13): 1 A at 24 V DC
• Switching Capacity (AC-15): 690 VA
• Switching Capacity (DC-13): 24 W
• Operating Temperature Range: -25 to +60 °C
• Protection Class: IP20
• Electrical Endurance: 100,000 switching cycles
• Mechanical Endurance: 10 million switching cycles
• Insulation Voltage: 300 V
• Surge Voltage Resistance: 4 kV
• Standards/Approvals: CE, UL, CSA, CCC

Recommendations

For optimal performance, ensure that the relay is installed in a clean, dry environment within the specified temperature range. Use appropriate screw terminals with correct torque settings. This relay is ideal for applications requiring high reliability and safety.