BusQor DC-DC Bus Converters. The BusQor® bus converter are the next-generation, board-mountable, isolated, fixed switching frequency DC-DC converters that use synchronous rectification to achieve extremely high conversion efficiency. The BusQor® bus converters are available in Un-regulated, Semi-regulated, Fully-regulated and High Input Voltage models. The SynQor bus converters are ideal for creating the mid-bus voltage required to drive standard point-of-load (non-isolated) DC-DC isolated converters.; NOTE: Not all combinations make valid part numbers. Please consult the factory for specific product availability.