Omron MY2IN-CR 110/120VAC (S) Miniature Power Relay
The Omron MY2IN-CR 110/120VAC (S) Miniature Power Relay is a plug-in industrial relay designed for AC control circuits requiring dependable DPDT switching and coil surge suppression. The CR designation refers to a resistor-capacitor surge suppression feature, which is especially relevant in AC relay coils where electrical noise and switching transients may affect nearby control equipment.
This relay is part of Omron’s MY miniature power relay family and is widely used in industrial panels, machine control systems, relay logic circuits, auxiliary switching applications, and control cabinets operating with 110/120 VAC coil supply. For more details about Omron components, visit Omron relay information.
Technical Overview
The Omron MY2IN-CR 110/120VAC (S) is generally associated with a DPDT contact arrangement, plug-in socket mounting, AC coil operation, and CR surge suppression. DPDT contacts allow two independent circuits to be switched from one coil input. This makes the relay suitable for control logic, feedback circuits, interlocks, pilot lamps, alarm outputs, and auxiliary switching.
The 110/120 VAC coil rating makes this model suitable for traditional industrial control systems using North American-style AC control voltage. Many legacy panels, machine tools, HVAC control units, and process systems still rely on 110 or 120 VAC control circuits, making this relay type highly relevant for maintenance and replacement applications.
CR Surge Suppression Benefit
When an AC relay coil is switched off, electrical transients can occur. A CR suppression circuit helps reduce noise and voltage spikes generated by coil switching. This can improve compatibility with surrounding control devices, reduce electrical interference, and support more stable panel operation.
The CR version is especially useful where relays are installed near timers, counters, PLC input modules, electronic controllers, or sensitive signal wiring. While it does not replace good panel design, shielding, grounding, or proper wiring separation, it adds a useful layer of suppression directly at the relay coil.
Omron MY2IN-CR 110/120VAC (S) Application Areas
The Omron MY2IN-CR 110/120VAC (S) Miniature Power Relay can be used in control panels, packaging machines, conveyor equipment, pump panels, HVAC systems, industrial automation cabinets, and service replacement applications. Its plug-in design allows fast relay replacement and reduces the need for rewiring during maintenance.
The relay is also practical where one control command must operate two separate circuits. For example, one contact can switch an output device while the other sends status feedback to a monitoring circuit. This supports cleaner panel logic and reduces the number of required components.
Installation Notes
The relay coil must be connected only to the correct 110/120 VAC supply range. The contact ratings must be reviewed based on voltage, current, and load type. Inductive loads require special attention because they can create arcing and reduce contact life if not managed correctly.
Socket compatibility is also essential. The relay should be installed in a compatible Omron socket designed for the MY series and the required terminal layout. Correct installation supports safe operation, easier inspection, and dependable long-term performance.
FAQ
What is the Omron MY2IN-CR 110/120VAC (S) Miniature Power Relay used for?
It is used for AC control switching in industrial panels, automation systems, machine control equipment, HVAC controls, and auxiliary relay circuits.
Omron MY2IN-CR 110/120VAC (S) What does CR mean in this relay?
CR refers to resistor-capacitor surge suppression. It helps reduce coil-generated electrical noise and switching transients in AC control circuits.
Is this relay suitable for 120 VAC control panels?
Yes, it is intended for 110/120 VAC coil applications, provided the circuit design, socket, and load ratings match the relay specification.
What does DPDT contact form provide?
DPDT contact form provides two independent changeover contacts, allowing one coil input to switch two separate circuits.
Can this relay be used as a direct motor starter?
No. It is generally used for control and auxiliary switching. Motor loads usually require a properly rated contactor or motor starter.
Why choose the CR version instead of a standard AC relay?
The CR version is useful when coil surge suppression is desired, especially near electronic control equipment or noise-sensitive panel wiring.
What should be checked before replacing this relay?
Check the coil voltage, contact form, contact rating, socket compatibility, wiring diagram, suppression type, and load characteristics before replacement.