7SR5121-3AD16-1AA0Brand: SiemensMPN: 7SR5121-3AD16-1AA0Directional time-overcurrent protection 7SR51 ,5 curr. trans., 4 volt. trans., 22 BI, 15 BO (incl. 3 HSBO), 3 AFD (Arc Flash Detector), Standard interface: 1 x Request a quote