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.

 

Features

  • •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

DCS-Harland-Littlefuse-AC-Relay-for-HVAC-and-Industrail-Switching-3-400.jpg

  • •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



Editor’s Pick: Featured Article

Weidmüller’s u-control 2000: The Automation Controller

Weidmüller’s u-control 2000: The Automation Controller

Weidmüller’s scalable engineering software, u-control 2000, adapts individually to your requirements. And, the u-control is powerful, compact and fully compatible with Weidmüller’s I/O system u-remote. This article looks at what makes u-control the heart of your automation.

Programmable logic controllers (PLCs) are one of the main components of any automated system. A typical control system has inputs, outputs, controllers (i.e., PLCs), and some type of human interaction with the system, a human machine interface (HMI), for example.

Read More



Latest Articles

  • Schneider Electric Canada Leverages AI to Help Buildings Reach Net Zero Without Full Scale Rebuilds

    September 9, 2025 By Krystie Johnston Schneider Electric Canada is leveraging artificial intelligence (AI) to transform energy management across various end markets. To help buildings in Canada reach net zero, Schneider takes a multi-pronged approach to leverage AI to identify energy inefficiencies in homes and commercial and industrial institutions and monitor and adapt the technologies… Read More…

  • Bossard is Scaling Front Line Flexibility

    September 5, 2025 Experience Smart Factory Solutions that Adapt to Your Operators’ Needs at FABTECH 2025 By Krystie Johnston Bossard is bringing the future of assembly and inventory management to FABTECH 2025 from September 8 – 11. Visit them at Booth #B13000, at the North Hall in the Automation Pavilion at McCormick Place in Chicago… Read More…