Omron MY4N 24VAC (S) Miniature Power Relay Guide
The Omron MY4N 24VAC (S) miniature power relay is a plug-in 4PDT relay designed for low-voltage AC control systems. It is part of Omron’s MY series, known for compact construction, reliable switching, socket compatibility, and easy visual status checking through an LED operation indicator.
Product Overview
This relay is used where a 24 VAC control supply is available, such as control panels, automation cabinets, HVAC systems, machinery, and auxiliary switching circuits. The 4PDT contact arrangement allows four separate changeover circuits to be controlled by one coil signal, which is useful in relay logic and multi-signal control designs.
Coil Data
The Omron MY4N 24VAC (S) coil is rated at 24 VAC. Coil current is approximately 53.8 mA at 50 Hz and 46 mA at 60 Hz. Coil resistance is approximately 180 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. Power consumption is approximately 0.9 to 1.3 VA.
Contact Ratings
The relay provides 4PDT single contacts using gold-clad silver alloy material. Typical contact ratings 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 switching power includes 660 VA for resistive AC loads and 72 W for resistive DC loads.
Why 24 VAC Is Common
Many industrial and building control systems use 24 VAC because it offers a practical low-voltage control standard. The Omron MY4N 24VAC (S) fits well in systems that need dependable relay isolation without moving to DC control architecture. It can be used with transformer-based control circuits and other AC logic arrangements.
Serviceability and Panel Design
The plug-in relay format is valuable for panel builders and maintenance teams. Compatible sockets allow wiring to remain fixed while the relay can be removed for inspection or replacement. The LED indicator reduces diagnostic time by showing whether the coil is energized.
For more details about Omron products, visit Omron relay support.
Typical Applications
The Omron MY4N 24VAC (S) can be used in HVAC control panels, machine automation, sequence control, auxiliary contact expansion, alarm circuits, signal switching, interlock systems, and low-voltage AC control cabinets.
FAQ
What is the Omron MY4N 24VAC (S)?
It is a 24 VAC coil miniature power relay with 4PDT contacts, plug-in terminals, and an LED operation indicator.
What is the coil current?
The coil current is approximately 53.8 mA at 50 Hz and 46 mA at 60 Hz.
What is the contact form?
The contact form is 4PDT, also known as four pole double throw.
Can it be used in 24 VDC systems?
No. This model uses a 24 VAC coil. A 24 VDC circuit requires the DC coil version.
Why is this relay useful in HVAC systems?
Many HVAC control systems use 24 VAC control power, making this relay suitable for auxiliary switching and control logic.
Does the relay include an operation indicator?
Yes. The LED indicator helps confirm whether the relay coil is energized during operation or troubleshooting.