Littelfuse, Inc. is an industrial technology manufacturing company. It designs, manufactures, and sells electronic components, modules, and subassemblies throughout the world. Its segments include Electronics, Transportation and Industrial. Its Electronics segment consists of product offerings in the industry, including fuses and fuse accessories, positive temperature coefficient (PTC) resettable fuses and polymer electrostatic discharge (ESD); semiconductor products, such as discrete transient voltage suppressor (TVS) diodes, silicon and silicon carbide metal-oxide-semiconductor field effect transistors and diodes, and insulated gate bipolar transistors (IGBT) technologies. Its Transportation segment consists of circuit protection, power control and sensing technologies for global original equipment manufacturers. Its Industrial Segment consists of industrial circuit protection (industrial fuse), industrial controls (protection relay, contactors, transformers) and temperature sensors.