Omron LY3-AC120 Relay

The Omron LY3-AC120 is a heavy-duty, general-purpose 3PDT power relay engineered for reliable switching in industrial HVACR control circuits and automation panels. Operating on a 120VAC coil voltage, this triple-pole double-throw relay features a 10A contact rating, making it ideal for managing inductive loads, motor starters, and multi-circuit signaling. Designed with plug-in/solder terminals, it offers versatile installation options, whether utilizing PTF11A sockets for easy field replacement or direct wire-to-terminal soldering for high-vibration environments. The inclusion of a standard bracket mounting ensures secure mechanical fastening within the cabinet. With its robust arc barriers and high dielectric strength, the LY3-AC120 relay prevents inter-phase flashover, ensuring long-term performance in high-density rack configurations. Contractors often specify this electromechanical relay for its consistent mechanical cycling and its ability to handle industrial electrical control requirements without premature contact pitting.

• Versatile 3PDT Configuration: Manages three independent circuits simultaneously, reducing the need for multiple components.
• Dual Termination Options: Supports both plug-in socket mounting and permanent solder connections for varied field applications.
• High Dielectric Strength: Capable of withstanding 2,000V AC between poles and coil to prevent internal arcing.
• Integrated Bracket: Simplifies installation by allowing direct surface mounting without extra hardware.
• Compact Power Switching: Small footprint delivers 10Amp switching capacity, optimizing panel space for dense equipment layouts.

Common Questions

What is the difference between LY3 and LY2 series Omron relays?
The LY3 series features a 3PDT (3 Pole, Double Throw) configuration, allowing for the control of three separate circuits, whereas the LY2 is a DPDT (2 Pole) version. Both share the same 10A rating and footprint width, though the LY3 requires an 11-pin socket.

Can I use the LY3-AC120 for DC switching applications?
While designed primarily for AC control circuits, this relay can switch DC loads; however, you must derate the contact capacity according to the inductive nature of the load to prevent contact welding. Always refer to the specific relay coil resistance and load curves for DC applications.

Does this relay require a specific mounting orientation?
No, the Omron LY3-AC120 can be mounted in any orientation using the standard bracket mounting or a compatible DIN-rail socket, provided there is adequate clearance for heat dissipation and wiring.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.