Omron MY4N 12VAC (S) Miniature Power Relay Guide
The Omron MY4N 12VAC (S) miniature power relay is a compact plug-in relay built for low-voltage AC control circuits. It belongs to the Omron MY family, a widely used relay series for control panels, sequence control, signal switching, and industrial automation. This 12 VAC version is especially relevant where machine builders or panel designers use low-voltage AC control transformers.
Product Overview
The Omron MY4N 12VAC (S) is a 4PDT relay with plug-in terminals and an LED operation indicator. Its four changeover contacts allow one coil signal to control four independent circuits. This makes the relay useful for control logic, auxiliary switching, alarm routing, interlock circuits, and machine status signaling.
The 12 VAC coil draws approximately 106.5 mA at 50 Hz and 91 mA at 60 Hz. Coil resistance is listed at approximately 46 ohms. The relay is designed to operate at 80 percent or less of rated voltage and release at 30 percent or more of rated voltage, which supports dependable behavior in properly designed AC control circuits.
Contact Ratings and Switching Capability
The Omron MY4N 12VAC (S) uses 4PDT single contacts with gold-clad silver alloy contact material. Typical rated 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 and 72 W for resistive DC loads.
Why Choose a 12 VAC Relay Coil?
A 12 VAC relay coil is often chosen in compact equipment, legacy control systems, test fixtures, and panel circuits powered by a low-voltage AC transformer. It offers electrical isolation between the coil circuit and the switched contacts while keeping the control side at a manageable voltage level.
Installation Benefits
The plug-in terminal design allows the relay to be mounted on compatible MY series sockets. This approach supports fast service replacement and cleaner panel wiring. The LED indicator is also valuable during troubleshooting because it gives a clear visual signal when the relay coil is energized.
Omron MY4N 12VAC (S) For additional Omron relay references, visit Omron product information.
Typical Uses
This relay can be used in control panels, machine automation, HVAC control logic, alarm signaling, low-voltage AC circuits, test equipment, and auxiliary switching applications. Its four-pole layout is helpful when multiple circuit paths must change state together.
FAQ
What is the Omron MY4N 12VAC (S)?
It is a 12 VAC coil miniature power relay with 4PDT contacts, plug-in terminals, and an LED operation indicator.
What is the coil current of this model?
The 12 VAC coil is rated at approximately 106.5 mA at 50 Hz and 91 mA at 60 Hz.
Can it switch DC loads?
Yes, within its DC contact rating. Typical DC resistive load rating is 24 VDC at 3 A.
Can it replace a 12 VDC relay?
No. A 12 VAC coil relay and a 12 VDC coil relay are not the same. The control supply must match the coil type.
What does the LED indicator show?
The LED indicates that the coil is energized, helping with inspection and fault diagnosis.
Why is 4PDT useful?
It allows four separate circuits to be switched by one relay coil, reducing panel complexity in multi-signal applications.