HVAC

white HVAC units on top of a building

Enhance HVAC Performance

Leading OEMs rely on Littelfuse for critical electronic components of HVAC equipment. We engineer the broadest portfolio of devices to protect circuits from damaging electrical faults, to control loads and enhance system performance, and to sense temperature accurately. Our solutions work in commercial and residential heat pumps, water heaters, smart thermostats, and rooftop and split systems.

grey air conditioning units

Heat Pumps

Keeping heat pumps operating at peak efficiency ensures the comfort of building occupants and saves money. Consult this block diagram to identify Littelfuse components that help achieve those goals. Options include capacitors for motor starters, thermistors for temperature sensing, and TVS diode arrays for lightning protection. We also supply ESD suppressors for wireless interfaces.

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white heating and cooling units on a roof

Packaged Rooftop Systems

As your design partner, the HVAC team at Littelfuse can help you select the right solutions for packaged rooftop systems. Our extensive product portfolio ranges from overload and overcurrent protection solutions for fans to timing and temperature sensing solutions for furnaces and heat pumps.

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blue smart thermostat

Smart Thermostats

Wi-Fi–enabled smart thermostats showcase a range of circuit protection and sensing solutions Littelfuse can deliver. Our ESD protection devices prevent damage from human–machine interactions with the unit or a smartphone. Our overcurrent, overvoltage, and thermal protection devices prevent shorts and overloads. And our diodes, solid state relays, and temperature sensors ensure efficient operation.

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A technician uses a yellow handheld device while checking gauges for a HVAC system

Split Systems

Split HVAC systems consist of indoor furnaces and outdoor air conditioner units or heat pumps. This arrangement demands a broad array of electronics solutions, many of which must withstand harsh environmental conditions such as extreme temperatures and heavy rain. Littelfuse delivers those solutions with high-performance TVS diodes, varistors, thermistors, contactors, and solid state relays.

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hand turning knob on water heater

Water Heaters

Highly efficient and long-lived water heaters use high-performance electronic components. Depend on Littelfuse to provide contactors, capacitors, temperature sensors, and solid state relays that protect and optimize the operations of the heating element. We can also deliver overcurrent and overvoltage protection solutions for the unit.

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HVAC Resources

How Littelfuse Engineers Can Help You Design HVAC Systems
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How Littelfuse Engineers Can Help You Design HVAC Systems

Consult with our experts when choosing circuit and surge protection, motor control, and temperature sensing solutions.

Solutions for HVAC Units
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Solutions for HVAC Units

See electronic components Littelfuse makes to enhance control, circuit protection, and sensing in climate control applications.