AC Relay for HVAC and Industrial Switching – HCR Series by Hartland Controls/Littlefuse

DCS Harland Littlefuse AC Relay for HVAC and Industrail Switching 2 400

Hartland Controls’ relays provide power system on/off switching capabilities. The primary purpose of Hartland Controls/Littelfuse’s relays is to switch electrical circuits on and off in an instant. Relays are essentially electromagnetic switches activated by a low power signal or current in one circuit to open or close another circuit. They are most commonly used in power system networks and multiple automotive and industrial applications or HVAC where the system is controlled by 24 VAC, 120 VAC, or 240 VAC.



  • •SPST-NO (Single Pole/Single Throw – Normally Open Contacts – HCR-5 Series)
  • •SPDT (Single Pole/DoubleThrow – HCR-5 Series)
  • •DPST-NO (Double Pole/Single Throw – Normally Open Contacts – HRC-6 Series)
  • •DPDT (Double Pole/DoubleThrow – HRC-6 Series)
  • •Class B insulation system
  • •0.250″ QC (Quick Connect) terminals


  • •Multi-positional mounting
  • •UL 508 File No. E227250
  • •Temperature range: -40°C to +65°C
  • •Mechanical life expectancy: 1 million operations
  • •Electrical life expectancy
    • •250,000 operations—resistive
    • •100,000 operations—inductive
  • •Contact material: silver cadmium oxide alloy



DCS Harland Littlefuse AC Relay for HVAC and Industrail Switching 4 400

Download the Basic Relay Terminology Guide here 

To learn more about the AC relay from Hartland Controls/Littlefuse, click here


Related Articles

  • New G2RV-ST And G3RV-ST Relays from Omron

    New G2RV-ST And G3RV-ST Relays from Omron

    Omron’s New G2RV-ST And G3RV-ST Relays Are Among the Fastest in the Industry That Provide Better Visibility, Top-Notch Reliability, and Vibration Resistance January 23, 2023 Speedier relays are a key requirement in today’s fast-paced manufacturing industry, and Omron responded to this need with the new ST relays that are among the fastest available on the… Read More…

Editor’s Pick: Featured Article

Conserving Power and CO2 Emissions with Premium Efficiency Motors

The process of converting electrical energy to mechanical energy is never perfect. As much as we would like to have a 100% efficient motor, it is impossible to build a machine that will take 746 watts of electricity (the equivalent of 1 Hp) and convert it to 1 Hp of mechanical output. It always takes somewhat more than 746 watts to yield 1 Hp’s worth of output.

Motors are continuously being pushed to be more efficient and reduce these losses. Over the years the guiding regulations of motor manufacturing have pushed us to improve efficiencies to new levels to reduce the considerable global power consumption of motors, as they are everywhere. From our factories, utilities and homes and most anywhere you can think of.

How much power consumption aka money are you spending that you do not have to? Take a minute while having your coffee to see if you can save money.

Read More

Latest Articles