Omron LY2F 110/120VAC General Purpose Relay Technical Guide

The Omron LY2F 110/120VAC general purpose relay is a two-pole electromechanical relay designed for control panels, machinery, automation cabinets, and industrial switching circuits. It combines Omron’s LY relay platform with a flange-style case-surface mounting format, making it useful when a relay must be fixed directly to a panel surface rather than only installed through a socket rail arrangement.

This model is built for 110/120 VAC coil operation and uses DPDT contacts. It is rated for 10 A resistive load switching, with silver alloy contacts and a closed cover design. The coil ratings include operation at both 110 VAC and 120 VAC across common AC frequencies, which makes the relay suitable for equipment designed around North American-style control voltages or industrial AC control circuits.

Core Technical Characteristics

The Omron LY2F 110/120VAC general purpose relay has a DPDT contact form, single contact method, Ag alloy contact material, and a contact rated load of 10 A for resistive loads. Its maximum contact voltage is listed as 250 VAC or 125 VDC, with maximum contact current of 10 A for AC and DC. The coil resistance is specified at 4430 Ω, while operate and reset times are commonly listed at 25 ms.

Flange Mounting Advantages

The “F” version is valuable when panel designers prefer a relay that can be secured by its flange. This helps keep the relay mechanically stable in equipment exposed to vibration, service movement, or dense wiring. Flange mounting is often chosen for machine panels, retrofit cabinets, test equipment, and small control enclosures where component position must remain fixed.

Common Application Areas

This relay is suitable for motor starter logic, lighting control, HVAC circuits, alarm signaling, industrial machine control, and auxiliary switching. Because it uses DPDT contacts, it can handle paired switching tasks such as switching a load while simultaneously sending a status signal. This flexibility is one reason LY-style relays remain common in many industrial panels.

Practical Selection Advice

Choose this model only when the control voltage is 110/120 VAC. If the system uses 24 VAC, 24 VDC, 48 VDC, or 220/240 VAC, another LY variant should be selected. Also check whether the load is resistive or inductive. Inductive loads create arcs and may reduce contact life if not handled correctly. Proper suppression, fusing, and wiring practices should always be considered.

Omron LY2F 110/120VAC For more details about Omron relay families, visit Omron.

Omron LY2F 110/120VAC FAQ

What is the Omron LY2F 110/120VAC general purpose relay used for?

It is used for switching loads in AC control systems, especially in automation panels and machine control circuits.

What does the “F” mean in LY2F?

The “F” version refers to the flange mounting style, allowing the relay to be fixed directly to a panel surface.

Is this relay DPDT?

Yes. It has two changeover contacts, making it suitable for controlling two circuits or one circuit plus an auxiliary signal.

Can it be used on 24 V systems?

No. This specific version is for 110/120 VAC coil operation. A 24 V version should be selected for 24 V systems.

Why is contact material important?

Silver alloy contacts help provide reliable conductivity and switching performance across suitable industrial loads.