Omron LY4N 100/110VDC Relay Technical Overview
The Omron LY4N 100/110VDC relay is a general-purpose plug-in relay designed for control panels, industrial automation circuits, and applications where a reliable 4-pole switching device is required. As part of the Omron LY series, this model combines a 100/110 VDC coil, 4PDT contact configuration, LED operation indicator, and socket-based installation structure.
This relay is commonly selected for control systems that require multiple circuits to be switched from a single coil signal. Its 4PDT contact form allows four independent changeover contacts to operate together, making it useful in machine control, interlocking circuits, signal routing, alarm systems, and automation panels.
For more details about Omron, you can review related industrial automation components and relay solutions.
Key Technical Specifications
The Omron LY4N 100/110VDC relay uses a DC coil rated at 100 VDC and 110 VDC. According to Omron specifications, the coil current is approximately 15 mA at 100 VDC and 15.9 mA at 110 VDC. The coil resistance is listed as 6,900 ohms, while the operate voltage is 80% maximum of the rated voltage.
The relay features a 4PDT contact arrangement, also described as four-pole double-throw. This structure allows the relay to control four separate circuits with normally open and normally closed contact paths. The contact material is silver alloy, supporting stable performance across general-purpose switching tasks.
The contact rated load is 10 A for resistive loads at 110 VAC and 10 A for resistive loads at 24 VDC. For inductive applications, the relay is rated at 7.5 A at 110 VAC with a power factor of 0.4, and 5 A at 24 VDC where L/R is 7 ms.
Design and Installation
The Omron LY4N 100/110VDC relay is built as a plug-in relay with a closed cover and integrated LED operation indicator. The LED indicator provides visual confirmation when the coil is energized, which is valuable during maintenance, diagnostics, and commissioning.
Its socket mounting structure makes replacement easier than hardwired relay formats. Compatible socket options include PTF-14-PU-L, PTF14A, PTFZ-14-E, PT14, PT14QN, and PT14-0. This makes the relay practical for panel builders who need serviceable components in compact control cabinets.
Operating Environment
The relay is designed for operation in temperatures from -25°C to 40°C, with no freezing or condensation. The supported operating humidity range is 5% to 85%. With an approximate weight of 70 g, it remains suitable for dense relay assemblies and modular control panels.
Typical Applications
The Omron LY4N 100/110VDC relay is suitable for DC control circuits, automation panels, machinery logic, signal isolation, alarm circuits, and industrial switching systems. Its 100/110 VDC coil rating makes it particularly relevant in systems where higher DC control voltages are already used.
FAQ
What type of relay is the Omron LY4N 100/110VDC?
It is a general-purpose plug-in relay with a 4PDT contact configuration, LED operation indicator, and 100/110 VDC coil.
What does 4PDT mean on this relay?
4PDT means four-pole double-throw. The relay can switch four separate circuits at the same time, with each pole offering normally open and normally closed contact paths.
Does the Omron LY4N 100/110VDC relay include an LED indicator?
Yes. The “N” version includes an operation indicator LED, which helps technicians quickly confirm coil activation.
What is the contact rating of the relay?
The relay is rated for 10 A resistive load at 110 VAC and 10 A resistive load at 24 VDC. It also supports lower current ratings for inductive loads.
Is this relay socket mounted?
Yes. It is designed for socket mounting and supports several Omron socket options, including PTF-14-PU-L and PTFZ-14-E.
Where is this relay commonly used?
It is commonly used in automation panels, industrial machinery, control circuits, alarm systems, and signal switching applications.