Omron MY4N 110/120VAC (S) Miniature Power Relay Guide

The Omron MY4N 110/120VAC (S) miniature power relay is a plug-in general-purpose relay built for AC control systems. It is commonly used in industrial control panels, machine automation, building equipment, relay logic systems, and auxiliary switching circuits where a 110 or 120 VAC control supply is available. With its 4PDT contact form and LED operation indicator, it offers practical visibility and flexible circuit control.

Coil and Electrical Data

The relay coil supports 100 VAC and 110 VAC ratings across 50 Hz and 60 Hz operation. Typical coil current values include 100 VAC at 9.9 mA for 50 Hz, 100 VAC at 8.4 mA for 60 Hz, 110 VAC at 10.8 mA for 50 Hz, and 110 VAC at 9.2 mA for 60 Hz. Coil resistance is listed at 4,430 ohms, and the operate voltage is 80 percent maximum of rated voltage.

This AC coil configuration makes the relay well suited to legacy and modern control panels that use line-derived control voltage. The LED indicator provides immediate visual confirmation when the coil is energized, which is helpful during commissioning, troubleshooting, and preventive maintenance.

Contact Format and Switching Ratings

The Omron MY4N 110/120VAC (S) uses a 4PDT contact arrangement with single contacts. Contact material is Au-clad plus Ag alloy. Rated switching loads include 220 VAC at 3 A for resistive loads, 220 VAC at 0.8 A for inductive AC loads, 24 VDC at 3 A for resistive DC loads, and 24 VDC at 1.5 A for inductive DC loads. This supports many control functions, including pilot light circuits, auxiliary contact multiplication, interlocking, signaling, and low-power actuator control.

Panel Integration

The relay uses plug-in terminals and is intended for socket mounting. This helps simplify replacement and reduces wiring disruption during service. Its closed-cover construction supports use inside electrical enclosures, while compatible Omron socket options allow engineers to build consistent relay assemblies in new panels or maintenance projects.

Omron MY4N 110/120VAC (S) For further Omron relay references, visit Omron product details.

Omron MY4N 110/120VAC (S) FAQ

What is Omron MY4N 110/120VAC (S) mainly used for?

It is mainly used for AC control circuits where one relay coil must switch multiple auxiliary circuits. It is suitable for machine panels, industrial control cabinets, signaling circuits, and relay-based logic systems.

Can this relay be used in 120 VAC control panels?

Yes, it is designed for the 110/120 VAC class of control supply, but the exact system voltage and frequency should be verified against the relay rating before installation.

What does 4PDT provide in practical wiring?

4PDT provides four independent changeover contacts. This allows one input signal to control several outputs, isolate circuits, or create interlock logic.

Does the LED indicator replace electrical testing?

No. The LED is a quick visual aid showing coil energization. Proper electrical testing is still required when verifying contact condition, load voltage, or downstream circuit behavior.

Is this relay suitable for inductive loads?

Yes, but only within the lower inductive load ratings. Inductive devices can create arcing and electrical stress, so the load type, current, and voltage must be checked carefully.