Omron LY4 100/110VAC 4-Pole Socketed Relay: Technical Guide, Applications and Installation
Industrial automation decisions are rarely reversed quickly. Choosing the Omron LY4 100/110VAC 4-Pole Socketed Relay for multi-channel signal switching applicationsat 110/120V AC is the kind of decision that stays looking smart years later, when the system is still running without issues.
Component selection rarely happens in isolation. Alongside this relay or switch, many integrators also evaluate Omron Omron Sensor technologies — inductive proximity, photoelectric, and ultrasonic models that can directly trigger the very outputs this product controls.
What Is the Omron LY4 100/110VAC 4-Pole Socketed Relay?
The Omron LY4 100/110VAC is a 4-Pole Socketed Relay rated at 110/120V AC, built to handle multi-channel signal switching reliably over a long service life. Key engineering features include arc barrier, transparent cover, multi-pole switching, and the unit mounts via socket + din rail.
What separates this unit from generic alternatives is in the details: arc barrier, transparent cover, multi-pole switching. The coil operates at 110/120V AC, making it straightforward to match to existing control voltage buses without additional transformers or converters.
Technical Specifications
The table below summarises the main technical parameters of the Omron LY4 100/110VAC. For full specifications, always refer to the official Omron product datasheet, as application-specific derating may apply.
| Parameter | Value |
|---|---|
| Product Type | 4-Pole Socketed Relay |
| Coil / Operating Voltage | 110/120V AC |
| Contacts / Channels | 4-pole (4PDT) |
| Contact Current | 5 A |
| Key Features | Arc barrier, transparent cover, multi-pole switching |
| Mounting | Socket + DIN rail |
| Mechanical Lifetime | 50 million mechanical operations |
| Operating Temperature | -25 °C to +70 °C |
| Compatible Socket | PF113A / PTF11A |
Where Is It Used?
The Omron LY4 100/110VAC 4-Pole Socketed Relay is commonly specified for the following applications:
- Multi-channel signal switching
- Plc interface panels
- Automation cabinets
Across these use cases, the consistent thread is a need for dependable switching over a large number of operations, often in environments where an unplanned fault would create significant disruption. The Omron LY4 100/110VAC is designed with exactly those conditions in mind.
The Omron LY4 100/110VAC is designed to be used with PF113A / PTF11A. Using a non-compatible socket model can compromise contact pressure and reduce overall service life, so always verify socket compatibility before ordering.
Installation Notes
One underrated aspect of working with Omron components like the LY4 100/110VAC 4-Pole Socketed Relay is the consistency of the mounting system. If you have installed any other unit from the same family, the process is identical — same rail, same socket dimensions, same terminal layout. That repeatability genuinely speeds up panel assembly in high-volume projects.
For ongoing maintenance, periodically inspect for contact discolouration, check terminal screws for loosening, and look for any signs of heat stress on the housing. Catching these early avoids the much larger cost of an unplanned production stop.
Why Choose the Omron LY4 100/110VAC?
The case for choosing the Omron LY4 100/110VAC 4-Pole Socketed Relay is not built on marketing alone. It rests on measurable factors: documented mechanical and electrical lifespan ratings, certifications that satisfy CE and UL requirements, and a global spare parts network that means you can source a replacement quickly when a unit eventually reaches end of life.
Frequently Asked Questions
What is the difference between the Omron LY4 100/110VAC and a mechanical contactor?
The Omron LY4 100/110VAC 4-Pole Socketed Relay is designed for panel-level signal and load switching at the current ratings specified. A contactor is built for direct motor starting at higher currents. For applications within the rated capacity of the Omron LY4 100/110VAC, it offers faster switching, longer life, and a smaller footprint than a contactor.
How does temperature affect the Omron LY4 100/110VAC?
Like all electromechanical devices, performance can be affected at the extremes of the operating temperature range. The Omron LY4 100/110VAC is rated for use across a defined ambient temperature range — consult the datasheet for precise limits and any derating requirements at elevated temperatures.
Can I mount multiple Omron LY4 100/110VAC units side by side on a DIN rail?
Yes. The Omron LY4 100/110VAC 4-Pole Socketed Relay is designed for standard DIN rail assembly with adjacent units. Ensure adequate total load current is within the rail and busbar capacity, and that enclosure ventilation is sufficient for the combined heat dissipation.
Does the Omron LY4 100/110VAC include a test facility?
Depending on the model variant, some Omron relay sockets include a manual test button or push-to-test function. Check the specific socket model specified for the Omron LY4 100/110VAC to confirm whether this feature is available.
How long is the warranty on the Omron LY4 100/110VAC?
Omron provides a standard 12-month manufacturer warranty on products purchased through authorised distributors. Extended warranty options may be available — contact your local Omron distributor for details.