Omron MY4N 24VDC (S) Miniature Power Relay Technical Guide
The Omron MY4N 24VDC (S) miniature power relay is a 4PDT plug-in relay designed for control panels, machine automation, interface circuits, and industrial switching systems that require a dependable 24 VDC coil. It is widely used where multiple circuits must be controlled from one coil signal while keeping installation and maintenance practical.
This model uses a 24 VDC coil rated at approximately 36.3 mA, with a coil resistance of about 662 ohms and power consumption around 0.9 W. Its plug-in terminal structure makes replacement easier than hard-wired relay formats, especially in panels where downtime must be minimized. The built-in LED operation indicator helps technicians confirm coil status quickly during commissioning, troubleshooting, and preventive maintenance.
Key Technical Features
The relay has a 4PDT contact form, meaning four changeover contacts are operated by a single coil. The contact material is gold-clad silver alloy, supporting stable signal behavior and practical switching durability. Rated contact loads include 220 VAC at 3 A for resistive loads, 220 VAC at 0.8 A for inductive loads, 24 VDC at 3 A for resistive loads, and 24 VDC at 1.5 A for inductive loads. Maximum contact voltage is 250 VAC or 125 VDC, while maximum switching power reaches 660 VA for resistive AC loads.
Where It Is Commonly Used
This relay is suitable for PLC output interfacing, control cabinet logic, safety-related auxiliary circuits, motor control auxiliaries, lamp circuits, alarm systems, and low-voltage machine automation. Its 24 VDC coil fits modern industrial panels where DC control voltage is preferred for consistency, safety, and compatibility with controllers.
Why 4PDT Matters
A 4PDT relay allows one control signal to switch four separate circuits at the same time. This is useful when one machine state must trigger several control actions, such as enabling a signal lamp, switching an auxiliary input, isolating a feedback line, and activating another control branch. Instead of using multiple smaller relays, one Omron MY4N 24VDC (S) miniature power relay can simplify wiring and improve panel organization.
Installation Notes
Because this is a plug-in relay, it is normally used with compatible Omron PY series sockets. Socket mounting helps reduce wiring errors during replacement and supports faster service. The relay should be selected according to the real load type, not only the nominal voltage. Inductive loads need careful review because they create electrical stress during switching.
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Omron MY4N 24VDC (S) FAQ
What is the Omron MY4N 24VDC (S) miniature power relay used for?
It is used to switch multiple control or load circuits from a 24 VDC coil signal. Common use cases include automation panels, PLC interface circuits, machine control, indicator circuits, and auxiliary switching tasks.
Is this relay suitable for PLC output control?
Yes. Its 24 VDC coil makes it suitable for many PLC-controlled systems, provided the PLC output can supply the required coil current and the circuit design follows the panel manufacturer’s electrical standards.
What does 4PDT mean?
4PDT means four-pole double-throw. The relay has four independent changeover contact sets, allowing four separate circuits to be switched at the same time.
Omron MY4N 24VDC (S) Does the relay have an indicator?
Yes. The Omron MY4N 24VDC (S) miniature power relay includes an LED operation indicator, which helps confirm when the coil is energized.
Can it switch inductive loads?
Yes, but the inductive load rating is lower than the resistive load rating. Designers should check current, voltage, load type, and suppression requirements before applying the relay.