Omron MY3 24VDC General Purpose Relay Technical Guide

The Omron MY3 24VDC general purpose relay is one of the most practical MY series options for modern control panels because 24 VDC is widely used in PLC cabinets, sensor circuits, machine control systems, and industrial automation interfaces. Omron identifies the MY3 24VDC as a plug-in relay with three poles, 3PDT contact description, 5 A rated carry current, silver contacts, transparent case, mechanical indicator, and plug-in terminal structure. :contentReference[oaicite:5]{index=5}

Technical Specification Overview

The 24 VDC coil data for the MY3 model is listed with approximately 36.9 mA rated current and 650 ohms coil resistance. Omron also lists 3.2 H armature-off inductance and 5.72 H armature-on inductance for this 24 VDC version. The must-operate voltage for DC coils is specified as 80% maximum of rated voltage, and the must-release voltage is 10% minimum. :contentReference[oaicite:6]{index=6}

For contact switching, Omron’s MY series specifications include 5 A at 250 VAC for resistive AC load and 5 A at 30 VDC for resistive DC load under listed conditions. The MY3 24VDC version is also described as a miniature power relay with plug-in terminals and a single-contact 3-pole arrangement. :contentReference[oaicite:7]{index=7}

Why This Model Is Common in Automation Panels

In many industrial environments, 24 VDC is the standard control voltage. It is common in PLC outputs, distributed I/O modules, safety-related signaling circuits, and low-voltage control systems. The Omron MY3 24VDC relay works well as an interface between electronic control devices and field loads, especially when electrical isolation and multiple switched outputs are needed.

The relay’s mechanical indicator helps maintenance teams confirm coil operation without immediately using test equipment. The transparent case supports quick visual inspection, while the plug-in format supports faster replacement during planned maintenance. These features are valuable in panels where downtime must be controlled and troubleshooting needs to be efficient.

Practical Selection Guidance

This relay should be selected when the control supply is 24 VDC and the circuit requires three changeover contacts. Engineers should check whether the load is resistive or inductive, since inductive loads can reduce practical switching life and may require surge suppression. The socket, wiring method, ambient temperature, and expected switching frequency should also be reviewed.

Omron MY3 24VDC For further Omron reference material, visit Omron automation and relay components.

Omron MY3 24VDC FAQ

What is the Omron MY3 24VDC relay used for?

It is used for control panel switching, PLC interface circuits, auxiliary relay logic, machine automation, signal isolation, and multi-circuit control using a 24 VDC coil.

What is the contact form of this relay?

The MY3 24VDC uses a 3PDT contact arrangement, which means three independent changeover contacts operate from one coil.

What coil current does the MY3 24VDC use?

Omron lists the 24 VDC coil at approximately 36.9 mA for the MY3 version.

Is this relay suitable for PLC output circuits?

It can be suitable when the PLC output rating can drive the relay coil and the application requires relay isolation or contact multiplication. The PLC output specification must always be checked.

Does the relay have a visual indicator?

Yes. Omron lists this model with a mechanical indicator and transparent case, which helps during inspection and troubleshooting.

Can the Omron MY3 24VDC relay switch AC and DC loads?

The contacts can be used within the rated AC or DC contact limits, but the coil itself is 24 VDC. Load voltage, current, and load type must be confirmed before use.