5ST3021 SIEMENS

The 5ST3021 fault signal contact from Siemens provides reliable fault indication for miniature circuit breakers (MCBs) and residual current circuit breakers with overcurrent protection (RCBOs). Specifically designed for use with Siemens 5SL, 5SY, and 5SP MCBs, as well as 5SU1 RCBOs and 5SV residual current devices (RCDs), this auxiliary contact enhances the monitoring capabilities of your electrical system. Featuring two normally open (NO) contacts, the 5ST3021 allows for remote signaling of fault conditions, enabling prompt response and minimizing downtime. When used with 5SU1 RCBOs, the 5ST3805-1 handle coupler is required to ensure proper mechanical connection and operation. This fault signal contact provides a simple and effective way to enhance the safety and reliability of electrical installations. It facilitates the integration of protective devices into comprehensive monitoring and control systems. By providing remote fault indication, the 5ST3021 enables quick identification and resolution of electrical issues. This ultimately contributes to improved system uptime and reduced maintenance costs. Its compact design and easy installation make it a versatile solution for a wide range of applications.