Littelfuse, Inc. manufactures and sells circuit protection, power control, and sensing products in the Asia-Pacific, the Americas, and Europe.

The company's Electronics segment offers fuses and fuse accessories, positive temperature coefficient resettable fuses, polymer electrostatic discharge suppressors, varistors, reed switch based magnetic sensing products, and gas discharge tubes; and discrete transient voltage suppressor (TVS) diodes, TVS diode arrays, protection and switching thyristors, metal-oxide-semiconductor field-effect transistors and diodes, and insulated gate bipolar transistors.

This segment serves industrial motor drives and power conversion, automotive electronics, electric vehicle and related infrastructure, power supplies, data centers, telecommunications, medical devices, alternative energy, building and home automation, appliances, and mobile electronics markets.

Its Transportation segment provides blade, resettable, and high-current and high-voltage fuses, as well as battery cable protectors for hybrid and electric vehicles; fuses, switches, relays, circuit breakers, and power distribution modules for the commercial vehicles; and sensor products.

This segment serves original equipment manufacturers, Tier-I suppliers, and parts distributors in the passenger car, heavy duty truck, off-road vehicles, material handling, agricultural, construction, and other commercial vehicle end markets.

The company's Industrial segment offers industrial fuses, protection relays, contactors, transformers, and temperature sensors for use in renewable energy and energy storage systems, electric vehicle infrastructure, HVAC systems, industrial safety, non-residential construction, MRO, mining, and industrial automation.

It sells its products through distributors, direct sales force, and manufacturers' representatives.

Littelfuse, Inc. was founded in 1927 and is headquartered in Chicago, Illinois.