Omron MY3N 24VAC Miniature Power Relay Technical Guide
The Omron MY3N 24VAC miniature power relay is a compact industrial relay designed for low-voltage AC control systems. It is widely used in HVAC equipment, building automation systems, industrial machinery, alarm circuits, and auxiliary switching applications where 24 VAC control voltage is required.
General Relay Features
The relay includes a 3PDT contact configuration, providing three independent changeover contacts inside one compact housing. This allows one relay coil to switch several circuits simultaneously, making the relay useful for control logic, status indication, interlocking, and signal distribution tasks.
The relay body also includes a transparent protective cover and an integrated LED operation indicator, helping technicians verify relay status quickly during maintenance and diagnostics.
Electrical Ratings and Coil Data
The Omron MY3N 24VAC miniature power relay supports resistive contact loads up to 5 A at 220 VAC and 5 A at 24 VDC. Inductive loads require lower ratings because electrical arcing during switching places greater stress on relay contacts.
The 24 VAC coil typically draws approximately 53.8 mA at 50 Hz and 46 mA at 60 Hz. Coil resistance is approximately 180 ohms. These specifications help engineers calculate total transformer load and verify control circuit compatibility.
Omron MY3N 24VAC Socket Installation Advantages
The relay is compatible with Omron socket families including PYF11A, PY11, PY11QN, and PY11QN2. Plug-in socket installation simplifies relay replacement and supports efficient maintenance because wiring remains connected during servicing.
This approach helps reduce maintenance time and improves overall panel organization in industrial and commercial installations.
Typical Industrial Applications
The Omron MY3N 24VAC miniature power relay is commonly used in HVAC systems, automation cabinets, transformer-fed control circuits, building management systems, alarm panels, machine controls, and auxiliary relay logic.
For more industrial automation references, visit Omron relay resources.
Key Benefits
- Reliable 24 VAC coil operation
- Compact plug-in industrial design
- Flexible 3PDT contact arrangement
- Integrated LED operation indicator
- Transparent protective housing
- Fast relay replacement
- Wide socket compatibility
Omron MY3N 24VAC FAQ
What is the Omron MY3N 24VAC miniature power relay used for?
This relay is used in low-voltage AC control systems including HVAC equipment, automation panels, building controls, alarm circuits, and industrial signaling applications.
What are the advantages of a 3PDT relay?
A 3PDT relay allows one control signal to switch three separate circuits simultaneously, improving control flexibility and reducing the number of required components.
Does the relay include an LED operation indicator?
Yes. The integrated LED indicator helps technicians confirm relay energization quickly during operation and troubleshooting.
Can this relay operate with DC voltage?
No. This model is specifically designed for 24 VAC coil operation and should only be used with the correct AC control voltage.
Why is socket mounting important in industrial systems?
Socket mounting simplifies relay replacement, reduces maintenance downtime, and keeps panel wiring organized during service procedures.