BC1 rotary arm rheostat is made of alloy resistance wire wound around a circular ceramic skeleton and then sintered and fixed with high temperature glaze. The center of the disk is equipped with a rotating shaft to drive the brush on the resistor, thus obtaining the variable resistance value.

BC1 rheostat has the advantages of high power, humidity resistance and wide adjustment range. It is suitable for adjusting and controlling voltage and current or adjustable load resistance in low frequency AC or DC electrical equipment.