Omron MY4IN 110/120VAC (S) Power Relay: Technical Guide, Applications and Installation

Ask a panel builder which components they trust after midnight when nobody is around to troubleshoot, and you will hear brands like Omron come up immediately. The MY4IN 110/120VAC (S) Power Relay is a prime example of why — designed for industrial control panels, built to keep runningat 110/120V AC when it matters most.

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.

Omron MY4IN 110/120VAC (S) — Product Profile

The Omron MY4IN 110/120VAC (S) is a Power Relay rated at 110/120V AC, built to handle industrial control panels reliably over a long service life. Key engineering features include transparent cover, led coil-type indicator, 2.6 mm wide pins for low heat rise, and the unit mounts via din rail socket.

On the bench, transparent cover, led coil-type indicator, 2.6 mm wide pins for low heat rise stands out immediately. The 110/120V AC rating align with the control voltage standards used across manufacturing, building automation, and process control industries, reducing the need for additional conversion stages.

Technical Data Summary

The table below summarises the main technical parameters of the Omron MY4IN 110/120VAC (S). For full specifications, always refer to the official Omron product datasheet, as application-specific derating may apply.

Where This Product Fits

The Omron MY4IN 110/120VAC (S) Power Relay is commonly specified for the following applications:

• Industrial control panels
• Motor control
• Energy management

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 MY4IN 110/120VAC (S) is designed with exactly those conditions in mind.

The Omron MY4IN 110/120VAC (S) is designed to be used with PYF14A. Using a non-compatible socket model can compromise contact pressure and reduce overall service life, so always verify socket compatibility before ordering.

Practical Installation Tips

Commissioning the Omron MY4IN 110/120VAC (S) Power Relay is straightforward. Snap or screw it into position on the DIN rail, connect cables at the correct terminals, and confirm polarity where applicable. During the first powered test, verify that the indicator LED (where fitted) responds correctly and that the output contacts behave as expected under a controlled test load.

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.

Performance You Can Rely On

From a total cost of ownership perspective, the Omron MY4IN 110/120VAC (S) Power Relay makes financial sense even when its purchase price is higher than alternatives. Reduced unplanned downtime, fewer replacement cycles, and lower maintenance labour costs add up to a clear advantage over the operational lifetime of a machine.

Frequently Asked Questions