Omron MY4ZN-D2 100/110VDC (S) Miniature Power Relay Guide

The Omron MY4ZN-D2 100/110VDC (S) miniature power relay is a DC coil relay designed for control systems that require higher DC operating voltage than typical 12 VDC or 24 VDC panel circuits. With a plug-in 14-pin structure, 4PDT bifurcated contacts, mechanical and LED indication, and built-in diode coil suppression, this relay is suitable for industrial control, power distribution auxiliaries, machine interfaces, and control panels where 100/110 VDC logic is used.

Technical Overview

This relay uses a 100/110 VDC coil and a 4PDT contact configuration. The four changeover contacts allow one relay to switch several control paths at once. Its bifurcated contacts are designed to support reliable switching, particularly in control and signaling circuits where contact dependability matters. The plug-in construction also supports fast replacement through compatible Omron sockets.

The D2 feature indicates integrated diode surge suppression. When a DC relay coil is de-energized, stored energy in the coil can produce a voltage spike. The diode provides a path for this energy, helping reduce electrical stress on the driving circuit. This is useful when the relay is connected to electronic control outputs or sensitive DC control equipment.

Where 100/110 VDC Relays Are Used

Although 24 VDC is common in modern automation, 100/110 VDC control systems are still found in power plants, substations, industrial machinery, transportation systems, and specialized electrical panels. The Omron MY4ZN-D2 100/110VDC (S) supports these environments by combining higher DC coil compatibility with the familiar MY-series relay format.

Maintenance Advantages

Visual indication is valuable in higher-density relay panels. The LED indicator helps verify coil energization, while the mechanical indicator gives an additional physical status reference. For technicians, this can make fault tracing easier because relay state can be checked without immediately disconnecting wiring or using test instruments.

Selection and Safety Notes

Because this relay uses a DC coil with diode suppression, polarity must be respected. Before installation, engineers should confirm coil voltage, socket compatibility, terminal layout, load characteristics, insulation requirements, and environmental conditions. The relay should be operated only within its published ratings, especially when switching inductive loads.

Omron MY4ZN-D2 100/110VDC (S) For additional Omron component references and automation relay options, visit Omron product information.

Omron MY4ZN-D2 100/110VDC (S) FAQ

What is the Omron MY4ZN-D2 100/110VDC (S) miniature power relay?

It is a plug-in electromechanical relay with a 100/110 VDC coil, 4PDT bifurcated contacts, LED and mechanical indication, and built-in diode surge suppression.

Why does this relay use diode suppression?

The diode helps absorb coil energy when the relay is turned off, reducing voltage spikes that could affect the driving circuit.

Is polarity important with this relay?

Yes. DC relays with built-in diodes are polarity-sensitive. Incorrect polarity can prevent correct operation or create circuit issues.

Omron MY4ZN-D2 100/110VDC (S) Where is a 100/110 VDC relay commonly used?

It is often used in industrial control panels, power-related systems, auxiliary control circuits, and specialized equipment using 100/110 VDC control voltage.

Can this relay switch multiple circuits at once?

Yes. Its 4PDT contact arrangement allows four independent changeover circuits to switch together from one coil command.