3RB2123-4PB0 SIEMENS

The 3RB2123-4PB0 is an overload relay designed for comprehensive motor protection. It offers adjustable current settings ranging from 1 to 4 Amperes, making it suitable for motors with varying power requirements. This device is a size S0 relay, conforming to industry-standard dimensions for easy integration into existing systems. It features adjustable trip classes from 5 to 30, allowing users to fine-tune the relay's response time to match the specific motor and application characteristics. Mounting is simplified through direct contactor mounting, reducing installation time and complexity. The main circuit connections utilize screw terminals, ensuring secure and reliable electrical connections. Auxiliary circuits also employ screw terminals for consistent connectivity. The relay supports both manual and automatic reset options, providing flexibility in responding to overload events. Furthermore, it incorporates internal ground fault detection, enhancing overall system safety. Please note that the 3RB2123-4PB0 has been phased out, and the recommended successor is the SIRIUS 3RB3123-4PB0.