Littelfuse, Inc. is an industrial technology manufacturing company. It designs, manufactures and sells electronic components, modules and subassemblies. Its Electronics segment consists of product offerings, including fuses and fuse accessories, positive temperature coefficient resettable fuses, electromechanical switches and interconnect solutions, polymer electrostatic discharge suppressors, varistors, reed switch-based magnetic sensing, gas discharge tubes; semiconductor products, such as discrete transient voltage suppressor (TVS) diodes, TVS diode arrays, protection and switching thyristors, silicon and silicon carbide metal-oxide-semiconductor field effect transistors and diodes, and insulated gate bipolar transistors technologies. Its Transportation segment consists of a range of circuit protection, power control and sensing technologies. Its Industrial segment consists of industrial circuit protection, protective and monitoring relays, and industrial controls and sensors.