Brandenburg 477 SERIES HIGH VOLTAGE LAB POWER SUPPLY. Excellence in High Voltage HV Lab Series 477 Data Sheet 4W HIGH VOLTAGE LAB POWER SUPPLY Application: Photomultiplier, mass spectrometers, nuclear and medical instrumentation. 477 Series Iss 2 April 2011 Page 1 of 2 Order Code Polarity Output Voltage Output Current Ripple pk-pk Input Voltage 477-301 Switchable ±500V 8mA 5mV 115V / 230V ac 477-302 Switchable ±1kV 4mA 4mV 115V / 230V ac 477-303 Switchable ±2kV 2mA 2mV 115V / 230V ac 477-304 Switchable ±3kV 1.3mA 5mV 115V / 230V ac Electrical Specification Input 115/230V ac nominal, ±10%, 50/60Hz (Switchable 2 ranges).