Omron MY3N 110/120VAC Miniature Power Relay Technical Guide
The Omron MY3N 110/120VAC miniature power relay is a compact plug-in relay designed for industrial control systems that operate with 110 VAC or 120 VAC control voltage. It belongs to the Omron MY series, a long-established relay family widely used in automation panels, HVAC systems, machinery interfaces, process control equipment, and auxiliary switching applications.
Overview of the Relay Design
This relay uses a 3PDT contact arrangement, providing three independent changeover contacts inside one compact housing. This configuration allows one coil signal to switch multiple circuits simultaneously, making the relay suitable for control logic, status indication, signal transfer, and interlocking applications.
The relay body includes a transparent protective cover and an integrated LED operation indicator. These features help maintenance teams monitor relay activity quickly without additional test equipment. In busy control cabinets, visible relay status can significantly reduce troubleshooting time.
Electrical Specifications
The Omron MY3N 110/120VAC miniature power relay supports resistive contact loads up to 5 A at 220 VAC and 5 A at 24 VDC. When used with inductive loads such as contactor coils, solenoids, or small motors, lower current ratings apply due to the increased electrical stress generated during switching.
The relay coil is specifically designed for 110/120 VAC operation. Typical coil current values are approximately 9.9 mA at 110 VAC 50 Hz, 8.4 mA at 110 VAC 60 Hz, 10.8 mA at 120 VAC 50 Hz, and 9.2 mA at 120 VAC 60 Hz. Coil resistance is approximately 4,430 ohms.
Socket Installation and Maintenance
The relay uses a plug-in mounting format compatible with Omron socket families such as PYF11A, PY11, PY11QN, PY11QN2, and related 11-pin sockets. This installation method simplifies relay replacement and reduces maintenance downtime because the wiring remains connected to the socket during servicing.
Socket-mounted relays are especially valuable in industrial facilities where fast component replacement is necessary to maintain production continuity.
Omron MY3N 110/120VAC Industrial Applications
The Omron MY3N 110/120VAC miniature power relay is commonly used in automation systems, electrical control panels, HVAC equipment, packaging machines, conveyor systems, pump control stations, machine interfaces, and auxiliary relay circuits. Its three changeover contacts provide flexibility when one control signal must perform multiple actions at once.
For more industrial automation information, visit Omron relay products.
Benefits of the MY3N Relay Series
- Compact industrial relay construction
- Reliable 110/120 VAC coil operation
- 3PDT contact flexibility
- Integrated LED operation indication
- Transparent protective housing
- Easy plug-in replacement
- Wide socket compatibility
Omron MY3N 110/120VAC FAQ
What is the Omron MY3N 110/120VAC miniature power relay used for?
This relay is used in industrial and commercial control systems where 110 VAC or 120 VAC control voltage is available. Common applications include automation panels, machine controls, HVAC systems, and auxiliary switching circuits.
What does 3PDT mean on this relay?
3PDT means three pole double throw. The relay includes three separate changeover contacts, allowing multiple independent circuits to be controlled from one coil signal.
Does the relay have an LED indicator?
Yes. The built-in LED indicator provides visual confirmation when the coil is energized, helping technicians identify relay status quickly during inspection and troubleshooting.
Why are plug-in relays preferred in industrial panels?
Plug-in relays simplify replacement and maintenance. Technicians can replace the relay without disconnecting field wiring, reducing service time and minimizing wiring mistakes.
Can the MY3N relay switch inductive loads?
Yes, but inductive loads require proper load rating consideration because they create additional stress on relay contacts during switching operations.