Omron LY4N 12VDC Relay Technical Overview
The Omron LY4N 12VDC relay is a plug-in general-purpose relay from the Omron LY series. It is designed for control panel applications where dependable multi-pole switching, easy replacement, and clear operational status are important. This model uses a 12 VDC coil and includes an LED operation indicator.
With its 4PDT contact configuration, the relay can control four separate circuits from one coil signal. This makes it a practical component in automation control panels, low-voltage DC systems, machine interfaces, auxiliary control circuits, and signal switching applications.
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Key Technical Specifications
The Omron LY4N 12VDC relay has a 12 VDC coil with a coil current of 120 mA. Its coil resistance is specified as 100 ohms. The operate voltage is 80% maximum of the rated coil voltage, supporting dependable activation in suitable DC control environments.
The relay uses a 4PDT contact form. This means it provides four changeover contact sets, enabling one relay to perform several coordinated switching actions. The contact method is single contact, and the contact material is silver alloy.
For resistive loads, the contact rated load is 10 A at 110 VAC and 10 A at 24 VDC. For inductive loads, it is rated at 7.5 A at 110 VAC with a power factor of 0.4 and 5 A at 24 VDC with L/R of 7 ms.
LED Indicator and Serviceability
The integrated LED indicator is one of the main practical advantages of the Omron LY4N 12VDC relay. In real-world control panels, technicians often need to check relay status quickly. The LED allows visual confirmation that the coil is energized, reducing troubleshooting time and improving maintenance efficiency.
The plug-in terminal design also supports easier replacement. Instead of rewiring the relay during service, the unit can be removed from its socket and replaced with a compatible model. This is useful in production environments where downtime must be minimized.
Installation and Socket Compatibility
The relay is designed for socket mounting. Compatible sockets include PTF-14-PU-L, PTF14A, PTFZ-14-E, PT14, PT14QN, and PT14-0. Socket-based installation is especially useful for panel builders because it supports modular wiring, organized layouts, and simpler component replacement.
Operating Conditions
The Omron LY4N 12VDC relay is designed to operate between -25°C and 40°C, provided there is no freezing or condensation. The operating humidity range is 5% to 85%. The approximate relay weight is 70 g, making it suitable for compact control panel assemblies.
Typical Applications
The Omron LY4N 12VDC relay is often used in low-voltage DC control systems, automation equipment, interface circuits, alarm panels, machinery control, and switching circuits where multiple outputs must be controlled simultaneously. Its 12 VDC coil makes it suitable for systems powered by common industrial DC supplies.
FAQ
What is the Omron LY4N 12VDC relay used for?
It is used for general-purpose switching in control panels, automation systems, machine circuits, signal switching, and low-voltage DC control applications.
What coil voltage does the relay use?
This model uses a 12 VDC coil with a coil current of 120 mA.
Does the relay have an indicator light?
Yes. The Omron LY4N 12VDC relay includes an LED operation indicator that shows when the coil is energized.
What is the contact configuration?
The relay has a 4PDT contact configuration, allowing four separate changeover contacts to operate at the same time.
Can it switch DC loads?
Yes. It is rated for 10 A resistive load at 24 VDC and 5 A inductive load at 24 VDC under specified conditions.
Is this relay suitable for socket mounting?
Yes. It is a plug-in relay designed for use with compatible Omron relay sockets.
Why choose a 12 VDC relay?
A 12 VDC relay is useful when the control system already operates on 12 VDC power, such as compact control circuits, machine interfaces, and low-voltage automation systems.