Omron MY4IN 6VDC (S) Miniature Power Relay

The Omron MY4IN 6VDC (S) miniature power relay is a low-voltage DC plug-in relay used in compact control systems, test equipment, electronic interfaces, and battery-powered control circuits. Its 6 VDC coil makes it useful where the available control signal is much lower than standard 12 VDC or 24 VDC industrial supplies.

Technical Overview

This relay belongs to Omron’s MY4IN family, known for 4PDT switching, plug-in terminals, operation indication, and a latching lever. The four-pole contact arrangement allows one low-voltage coil signal to operate four separate changeover circuits. In MY relay data, four-pole models are commonly applied in sequence control and auxiliary power switching, with contact ratings depending on load type and operating conditions.

Low-Voltage Design Considerations

A 6 VDC coil requires careful power supply planning. Voltage drop can be more critical at low voltage, especially with long wiring, small conductors, weak batteries, or unstable regulator outputs. The relay should receive adequate coil voltage under real operating conditions, not only during bench testing.

Where It Fits Best

The Omron MY4IN 6VDC (S) miniature power relay is suitable for laboratory control rigs, prototype machines, embedded test fixtures, signal conversion circuits, and compact automation panels. It is also useful when a low-voltage control board needs galvanic isolation from higher-load circuits.

Practical Installation Guidance

Use a compatible socket, check coil polarity if an indicator is present, and validate the contact load. For inductive devices, add suppression across the load or coil as required by the circuit design. For brand reference and related relay information, see Omron relay information.

FAQ

What makes Omron MY4IN 6VDC (S) different from 24 VDC versions?

The main difference is the coil voltage. The 6 VDC version is intended for systems with low-voltage DC control supplies.

Is it still a 4PDT relay?

Yes. The MY4IN format provides four changeover contact sets operated by one coil.

Can it be used with microcontroller circuits?

It can be used in interface circuits, but the coil current must be driven through a suitable transistor or driver stage. A microcontroller pin should not be assumed to drive the coil directly.

Why is voltage drop important?

At 6 VDC, even a small wiring drop can reduce coil voltage enough to cause unreliable operation.

Does it support quick replacement?

Yes. The plug-in socket design allows faster replacement than soldered or hardwired relay formats.