Omron LY2-0 48VDC General Purpose Relay Technical Guide
The Omron LY2-0 48VDC general purpose relay is a compact electromechanical relay designed for dependable switching in control panels, automation circuits, interface boards, and industrial equipment. It belongs to Omron’s LY relay family, a series widely used where stable contact performance, clear electrical separation, and long service life are required.
This model uses a 48 VDC coil and a DPDT contact arrangement, also known as 2 Form C. That means it provides two changeover contacts, allowing one relay to control or isolate two separate circuits. The LY2-0 48VDC version is commonly associated with through-hole or PC pin mounting, making it suitable for printed circuit board integration where a relay must be mounted directly onto a board rather than placed into a plug-in socket.
Core Technical Characteristics
Key specifications include a 48 VDC coil, 10 A contact rating, silver alloy contact material, non-latching operation, and a maximum switching voltage of 250 VAC or 125 VDC. The coil current is typically around 18.5 mA, while the coil resistance is listed as approximately 2.6 kΩ. The operate and release times are both commonly specified at 25 ms, which is adequate for many control and automation applications where mechanical relay isolation is preferred over solid-state switching.
Where This Relay Is Typically Used
The Omron LY2-0 48VDC general purpose relay is often selected for industrial control boards, alarm interfaces, motor control logic, power supply supervision, HVAC control circuits, and machine automation panels. Its 48 VDC coil makes it especially relevant for systems using higher DC control voltages, including telecom cabinets, battery-backed control systems, and industrial DC distribution environments.
Why DPDT Contacts Matter
A DPDT relay is useful when a designer needs flexible switching. One pole may be used for a load circuit while the second pole reports status, changes signal routing, or provides auxiliary control. This helps reduce component count and simplifies wiring. For systems that require electrical isolation between a control board and a field device, this relay provides a practical and proven architecture.
Installation and Selection Notes
Before using this relay, confirm the coil voltage, load type, current demand, switching voltage, and PCB footprint. Resistive loads are easier to switch than inductive loads, so motors, solenoids, and contactor coils may require additional suppression components. The relay should also be used within the stated operating temperature range, and board layout should provide sufficient spacing around load terminals.
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Omron LY2-0 48VDC FAQ
What is the Omron LY2-0 48VDC general purpose relay used for?
It is used to switch electrical loads from a 48 VDC control circuit. Common uses include industrial automation boards, signal isolation, alarm systems, and control panels.
Is the LY2-0 48VDC a DPDT relay?
Yes. It uses a DPDT, or 2 Form C, contact configuration. This gives the relay two independent changeover contacts.
Omron LY2-0 48VDC Can it switch AC and DC loads?
Yes, within its rated limits. Always verify the load current, voltage, and load type before installation.
Is this a latching relay?
No. It is a non-latching relay, meaning the contacts return to their normal state when coil power is removed.
What should be checked before replacing this relay?
Check the coil voltage, contact rating, terminal layout, mounting type, contact form, and system wiring diagram.