BPR Metal Plate Resistors KOA Speer BPR Metal Plate Resistors are rectangular power current detecting resistors that are flame retardant in a ceramic case. The BPR series metal plate resistors from KOA are space-saving and offer automatic insertion for a 5mm pitch between terminals. Other features include low inductance, power rating from 2W to 10W, and operating temperature range from -40°C to +200°C.