Ohmite 40 Series Wirewound Axial Resistors. 40 Series axial resistors from Ohmite are constructed from a ceramic core with a conformal silicone ceramic coating. These axial resistors feature excellent resistance to thermal shock and have a low temperature coefficient. 40 Series axial resistors are a durable and economical solution. They have an all-welded construction and offer excellent stability in high temperature conditions. Features. Wirewound construction Solder coated copper clad axial terminals Standard tolerances of 1% and 5% are available. Product Application Information. 40 Series axial resistors have a wide range of uses including industrial, communications and commercial equipment.