KOA Speer Electronics, Inc. is a premier manufacturer of passive electronic components, primarily resistors and inductors. Headquartered in Bradford, Pennsylvania, USA, it is the North American subsidiary of Japan's KOA Corporation, founded in 1940. The company specializes in thick film, thin film, and current sense resistors, serving automotive, industrial, medical, and aerospace markets. Its flagship product series include the RK73 thick film chip resistors, SR73 current sensing resistors, and TF series thin film precision resistors. KOA Speer also offers a range of inductors and thermistors. Known for high reliability and precision, the company is a key supplier to demanding applications like engine control units and safety systems. With a strong R&D focus, it continuously advances thin film technologies and miniaturization. Globally, KOA Speer holds a significant market share in chip resistors, competing among the top passive component manufacturers. Their components are integral to power management, signal integrity, and circuit protection in electronics worldwide.