Omron MY4N 220/240VAC (S) Plug-In Relay Guide
The Omron MY4N 220/240VAC (S) plug-in relay is a 4PDT miniature power relay designed for AC control circuits operating at mains-level control voltage. It is commonly used in industrial panels, machine automation, building systems, and electrical control equipment where a 220 to 240 VAC coil supply is available.
Product Description
This model belongs to the Omron MY series and provides four changeover contacts in a compact plug-in relay body. It includes an LED operation indicator, plug-in terminals, and socket mounting. The relay is designed for control applications where multiple electrical paths must be switched by one AC coil input.
Coil Specifications
The Omron MY4N 220/240VAC (S) coil is rated for 220/240 VAC operation. Listed coil current values include approximately 4.8 mA at 220 VAC 50 Hz, 4.2 mA at 220 VAC 60 Hz, 5.3 mA at 240 VAC 50 Hz, and 4.6 mA at 240 VAC 60 Hz. Coil resistance is approximately 18,790 ohms. The relay operates at 80 percent or less of rated voltage and releases at 30 percent or more for AC coil versions.
Contact and Load Ratings
The relay uses 4PDT single contacts with gold-clad silver alloy contact material. Typical rated loads include 220 VAC at 3 A for resistive loads, 220 VAC at 0.8 A for inductive loads, 24 VDC at 3 A for resistive loads, and 24 VDC at 1.5 A for inductive loads. Maximum contact voltage is 250 VAC or 125 VDC, supporting a wide range of control and auxiliary switching tasks.
Why Use a 220/240 VAC Coil Relay?
A 220/240 VAC coil relay is practical when the control circuit already uses mains-level AC voltage. It can reduce the need for separate low-voltage power supplies in certain panels. However, correct electrical design, insulation, protection, and installation practices are essential when working with higher AC control voltages.
Maintenance and Panel Advantages
The LED indicator gives a quick visual confirmation of coil status. Socket mounting supports fast replacement and helps keep wiring organized. These details are important in industrial settings where clear diagnostics and rapid service can reduce downtime.
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Typical Applications
The Omron MY4N 220/240VAC (S) is suitable for control cabinets, machine relay logic, auxiliary switching, alarm circuits, pump panels, HVAC control, lighting control interfaces, and industrial automation circuits requiring multiple contact outputs.
FAQ
What is the Omron MY4N 220/240VAC (S)?
It is a 4PDT plug-in relay with a 220/240 VAC coil and LED operation indicator.
Omron MY4N 220/240VAC What is the coil resistance?
The coil resistance is approximately 18,790 ohms.
Can it be used in 24 VDC control circuits?
No. The coil must be powered with the correct 220/240 VAC supply. For 24 VDC control, a DC coil relay must be selected.
What does the relay switch?
It switches connected loads through its contacts. The contacts are electrically separate from the coil circuit.
Why is socket mounting useful?
It allows easier installation, cleaner wiring, and faster relay replacement during service.
Is it suitable for inductive loads?
Yes, within its rated inductive load limits. Designers should always check load type, voltage, current, and switching frequency.