Littelfuse's Industrial Business supports customers across a broad range of vertical markets, including processing and extraction industries, HVACR, data center infrastructure, utilities and grid infrastructure, renewable energy, energy storage systems, water and wastewater, system integrators, and OEMs. The portfolio includes fuses and circuit protection products, protective monitoring relays, industrial controls, and sensing solutions.

Key industrial products include fuses, fuse holders, power distribution blocks, ground fault relays, neutral grounding resistor monitoring relays, arc flash relays, motor protection relays, solid-state relays, single-function relays, definite-purpose contactors, control transformers, and other electrical protection, monitoring, and control devices designed to improve system safety, reliability, uptime, and operational efficiency.