3RH2122-4KB40 SIEMENS

The 3RH2122-4KB40 is a coupling contactor relay manufactured by Siemens, designed to interface PLC outputs with higher-power devices. This relay features a contact configuration of 2 normally open (NO) and 2 normally closed (NC) contacts, providing versatile switching capabilities. It operates on a 24 V DC control voltage, with a wide operating range of 0.7 to 1.25 times the rated voltage (US), ensuring reliable performance even with voltage fluctuations. An integrated suppressor diode protects the relay coil and connected circuitry from voltage spikes during switching. The relay is compact, conforming to size S00 standards, making it suitable for space-constrained applications. Connection is facilitated through ring cable lug terminals, ensuring secure and vibration-resistant connections. This relay is specifically designed for compatibility with PLC outputs, offering a reliable interface between control systems and field devices. Its robust design and integrated features make it ideal for industrial automation, control panels, and other applications requiring dependable switching. The 3RH2122-4KB40 offers a dependable solution for signal amplification and electrical isolation.