Omron MY4N 48/50VAC (S) Miniature Power Relay Technical Overview

The Omron MY4N 48/50VAC (S) miniature power relay is a plug-in industrial relay built for control systems using 48 to 50 VAC coil voltage. It belongs to the Omron MY family, a series known for compact construction, multi-pole switching, practical socket mounting, and clear operational visibility inside control panels.

This relay is typically selected when an AC control circuit is already present and the system requires reliable multi-contact switching. With a 4PDT contact configuration, it allows four separate circuits to be switched from one coil input. That makes it useful in machine control, process panels, auxiliary circuits, relay logic, signal transfer, and electrical cabinet retrofits.

Technical Characteristics

The Omron MY4N 48/50VAC (S) miniature power relay uses an AC coil rated for 48/50 VAC. Distributor data lists a coil current of about 22 mA and coil resistance near 788 ohms. The relay provides 4 Form C contacts, also described as 4PDT contacts. Depending on reference data and regional listing, the contact rating is commonly shown around 3 A for the MY series relay class, with switching voltage values up to 250 VAC or 125 VDC.

The plug-in terminal design supports fast installation and replacement when paired with a compatible socket. The relay includes an operation indicator, making visual inspection easier during maintenance. This is valuable in crowded panels where technicians need to identify energized relays without extra measurement steps.

Omron MY4N 48/50VAC (S) Applications in Industrial Panels

This relay is well suited for AC-controlled machinery, HVAC control panels, conveyor systems, older relay logic cabinets, pump control auxiliaries, alarm circuits, and interlocking circuits. In environments where 48 VAC or 50 VAC control voltage is standard, using the correct coil voltage avoids unnecessary transformers, extra interface modules, or mismatched components.

Design Considerations

When selecting this relay, engineers should confirm coil voltage, contact rating, load type, ambient temperature, socket compatibility, and applicable approvals. Resistive loads are easier to switch than inductive loads. Motors, solenoids, contactor coils, and transformers may require suppression components to reduce arcing and extend contact life.

The relay’s 4PDT layout can reduce component count when multiple signals must follow the same logic state. Instead of using separate relays for each branch, one Omron MY4N 48/50VAC (S) miniature power relay can centralize control while keeping wiring readable.

For related Omron relay options, visit Omron industrial relay information.

Omron MY4N 48/50VAC (S) FAQ

What is the coil voltage of the Omron MY4N 48/50VAC (S) miniature power relay?

It is designed for 48/50 VAC coil operation, making it suitable for AC control circuits that use this voltage range.

What does 4PDT provide in this relay?

4PDT provides four independent changeover contacts. This allows one coil signal to control four separate electrical paths simultaneously.

Is this relay plug-in mounted?

Yes. It is a plug-in relay intended for compatible socket mounting, which helps simplify wiring, maintenance, and replacement.

Does it include a visual indicator?

Yes. The model includes an operation indicator, allowing users to see whether the relay coil is energized.

Can it be used in automation cabinets?

Yes. It is commonly used in automation cabinets, relay logic panels, auxiliary control circuits, and general-purpose industrial switching systems.