Omron LY3-0 24VDC General Purpose Relay Technical Overview
The Omron LY3-0 24VDC general purpose relay is a PCB terminal relay designed for industrial control, automation interface circuits, and multi-contact switching applications. It is part of the Omron LY relay series, a long-established electromechanical relay family used in control cabinets, machine systems, power distribution interfaces, and equipment monitoring circuits.
This relay operates with a 24 VDC coil, which makes it highly relevant for modern automation systems where 24 VDC control voltage is a standard choice. Its 3PDT contact configuration allows three independent circuits to be switched simultaneously. This is useful for designs requiring coordinated switching, auxiliary contacts, status feedback, interlock logic, or separation between control and load circuits.
Technical Features
The Omron LY3-0 24VDC relay is listed as a general purpose PCB relay with three poles, a rated carry current of 10 A, DC coil operation, silver alloy contacts, and a transparent case. The PCB terminal design supports direct board integration, helping reduce wiring complexity in compact control assemblies.
Because the relay uses mechanical contacts, it provides galvanic separation between the coil circuit and the load contacts. This can be useful where a low-voltage PLC output, controller board, or interface circuit must control separate electrical paths. The transparent case also supports visual inspection during maintenance, helping technicians confirm relay type and contact structure without removing the unit from the board.
Where This Relay Is Used
The Omron LY3-0 24VDC general purpose relay is suitable for automation panels, industrial equipment, test fixtures, machine control boards, HVAC control circuits, signal conversion systems, and relay logic assemblies. Its 24 VDC coil aligns well with PLC outputs and industrial DC power supplies, making it a practical option for many control architectures.
In board-level systems, this relay may be used where plug-in socket relays are not preferred due to space, vibration, or layout strategy. The PCB format can provide a cleaner assembly, especially in OEM equipment where repeatable production and compact wiring are important.
Selection Guidance
Before specifying this relay, confirm the exact coil voltage, contact rating, contact form, terminal layout, expected switching frequency, and load type. Resistive loads are easier to switch than inductive loads. If the relay will switch solenoids, coils, motors, or transformers, designers should evaluate contact protection such as flyback diodes, RC snubbers, or varistors depending on the circuit.
For more product family context, visit Omron industrial automation components.
FAQ
What is the Omron LY3-0 24VDC relay used for?
It is used for general purpose switching in automation boards, control panels, machine control systems, and industrial interface circuits.
What coil voltage does this relay use?
The Omron LY3-0 24VDC relay uses a 24 VDC coil, a common voltage in PLC and industrial control systems.
What does the 3PDT contact form provide?
It provides three independent changeover contact sets, allowing one coil signal to switch three circuits at the same time.
Is this a socket relay or PCB relay?
This LY3-0 version is specified with PCB terminals, so it is intended for direct board mounting rather than standard plug-in socket mounting.
Is the relay suitable for inductive loads?
It can be used with inductive loads only within the correct electrical ratings. Inductive loads require extra care because they create voltage spikes when switched off.