In today’s HVAC and building automation systems, relays are everywhere. They may be one of the smallest components in a control system, but they play a critical role in ensuring equipment operates safely, efficiently, and reliably.
Not all relay applications are the same. A retrofit project may require flexible voltage compatibility, while a new control panel demands organized, scalable relay solutions. That’s why selecting the right relay is about more than simply switching a circuit—it’s about choosing a solution designed for the way the system will be installed, maintained, and expanded.
At Air Products and Controls (APC), our relay portfolio is built to meet those real-world challenges.
When working on retrofit projects or facilities with mixed-voltage control systems, flexibility is essential. The APC MR-100 and MR-200 Series eliminates the need to stock multiple relay models by supporting a wide range of common control voltages.
Key features include:
By reducing the number of relay types required on the job, installers can simplify inventory while increasing installation flexibility.
Not every application has room for a traditional relay enclosure. APC’s PAM Series is engineered for situations where space is limited and installation speed matters.
Its compact, encapsulated design with flying leads allows technicians to mount the relay in locations that would otherwise be difficult to access, making it an excellent choice for field installations.
Benefits include:
Whether adding control functionality or integrating existing equipment, the PAM Series helps simplify installation without sacrificing reliability.
For structured control panels used in HVAC, fire alarm, life safety, and security systems, organization and serviceability are just as important as performance.
The APC MR-700 and MR-800 Series provides a clean, modular relay solution designed specifically for panel applications.
Features include:
These modular relay assemblies make panel layouts cleaner, simplify troubleshooting, and provide technicians with immediate visual feedback during commissioning and service.
Every APC relay is developed with the installer and service technician in mind. Across the product family, you’ll find features that improve efficiency in the field, including:
The right relay can have a significant impact on the overall success of a project. By selecting relay solutions that match the application’s needs, contractors and system integrators can realize several important benefits:
Whether you’re retrofitting an existing building, wiring a new HVAC control system, or designing a life safety panel, APC offers relay solutions built for flexibility, reliability, and ease of installation.
From versatile multi-voltage relays to compact field-installed modules and organized panel-mounted assemblies, APC provides the dependable switching solutions professionals trust to keep building systems operating at their best.