5ST3020 SIEMENS

The 5ST3020 fault signal contact from Siemens is an auxiliary device designed to enhance the functionality of miniature circuit breakers (MCBs) and residual current circuit breakers with overcurrent protection (RCBOs). This contact provides remote indication of the breaker's status, allowing for prompt response to fault conditions. It features one normally open (NO) contact and one normally closed (NC) contact, offering versatile signaling options for various monitoring systems. The 5ST3020 is compatible with Siemens 5SL, 5SY, and 5SP MCBs, as well as 5SU1 RCBOs and 5SV residual current devices (RCDs). For use with 5SU1 RCBOs, the 5ST3805-1 handle coupler is required to ensure proper mechanical connection. This fault signal contact enables the integration of circuit breakers into building management systems (BMS) or other automation platforms. By providing real-time status updates, the 5ST3020 helps to minimize downtime and improve overall system reliability. Its compact design allows for easy installation within existing electrical panels. The 5ST3020 fault signal contact is an essential component for comprehensive circuit protection and monitoring.