Advanced modular DIN rail mount silicon surge protection for 48 Vdc applications. It is I2R IEP 48 -5 Tested to meet Class II applications. This surge protection installs at DC load centers and power distribution systems Status indication. The Modular Indoor surge protection Electrical Configuration 48 Vdc. The Mount Type DIN Rail Standards IEC EN 60529. The Maximum Continuous Operating Voltage is 57 Vdc.