5ST3020-2 SIEMENS

The 5ST3020-2 fault signal contact from Siemens provides reliable fault indication and remote signaling capabilities for miniature circuit breakers (MCBs) and residual current circuit breakers with overcurrent protection (RCBOs). This auxiliary contact features a test and acknowledgment key, allowing for convenient testing of the signaling circuit and confirmation of fault clearance. It incorporates one normally open (NO) contact and one normally closed (NC) contact, offering versatile wiring options for various control and monitoring systems. Specifically designed for use with Siemens 5SL, 5SY, and 5SP MCBs, as well as 5SU1 RCBOs and 5SV residual current devices (RCDs). When used with 5SU1 RCBOs, the 5ST3805-1 handle coupler is required for proper mechanical connection. This fault signal contact enables prompt identification of tripped breakers, facilitating faster troubleshooting and reducing downtime. Its robust design ensures reliable operation in demanding environments. The test and acknowledgment functionality enhances safety and simplifies maintenance procedures. By providing clear fault indication, the 5ST3020-2 contributes to improved system reliability and operational efficiency. This device is an essential component for comprehensive circuit protection and monitoring solutions.