7SR5121-6BA16-0AA0Brand: SiemensMPN: 7SR5121-6BA16-0AA0Directional time-overcurrent protection 7SR51, 5 curr. trans., 4 volt. trans., 37 BI, (standard), 18 BO (incl. 4 HDBO (Heavy Duty)), Standard interface: 1 x USBRequest a quote