Siemens Low Voltage Circuit Protection Panelboard/Switchboard Units. Type VB PANELBOARD UNITS Std UL V. Rating 250V A. Rating 400A No. Of Poles 2P F. Rating 60Hz Action SINGLE THROW Mounting INSIDE PANEL BOARD. O. Cycles 6050 O. Temperature (-20F-120F) AMBIENT TEMPERATURE Environmental Conditions INDOOR