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Single-Function & Control Relays

Single-function relays produced by Littelfuse respond to temperature or voltage changes to control HVAC units, lighting fixtures, and fans. Our solid-state relays have residential and industrial applications, acting as on–off switches for current. The performance of each temperature-controlled or voltage-controlled relay will depend on its placement. Please consult with a Littelfuse expert to ensure you choose the correct solution and receive optimized results from the single-function relay you select.

Subcategories under Single-Function & Control Relays

Alternating Relays

Use Littelfuse alternating relays to optimize electrical loads by equalizing the run time of two or more electric motors. These relays often get used

Current Monitoring Relays Transducers

Littelfuse current and load monitoring relays, sensors, and transducers are the ideal solution for monitoring loads. These products protect against

Flashers & Tower Lighting Controls

Littelfuse designs and manufactures flashers and tower lighting controls for a variety of industrial applications including communication towers,

Intrinsically Safe Relays

Littelfuse intrinsically safe relays are UL 913 listed as associated apparatuses for interfacing between hazardous and nonhazardous areas. These

Proof Relays

Littelfuse proof relays are used to verify that current is flowing as intended and are the ideal solution for monitoring and processing input

Pump Controls & Liquid Level Controls

Littelfuse pump controls and liquid level controls are designed to detect abnormalities in pumping systems and ensure they are operating at the

Single-Function Relays

Littelfuse single function relays are designed for the protection, control and/or monitoring of generators and other devices. These high-quality,

Time-Delay Relays

Littelfuse manufactures a variety of time delay relays designed to control power to different types of electrical loads. These time delay relays

Voltage-Monitoring Relays

Littelfuse offers a variety of voltage monitoring relays that are designed to protect industrial equipment against voltage fault conditions. These