Omron MY2N-D2 Relay — Specs, Variants & Selection Guide

By Abdullah Zahid
14 min read
Omron MY2N-D2 miniature 2-pole DPDT plug-in power relay with built-in diode and operation indicator for industrial control panels

Omron MY2N-D2 Miniature Power Relay: Specs, Pricing and Selection Guide

If you are a controls engineer or panel builder searching for the Omron MY2N-D2 relay, you are likely at the point of confirming specs, checking coil voltage options, or deciding whether this is the right variant before committing to a purchase order. The MY2N-D2 is a 2-pole DPDT miniature plug-in power relay with a DC-only coil, a built-in diode for coil surge suppression, and an operation indicator — all in the compact 8-pin form factor that mounts directly into PYF-series sockets. It is one of the most widely specified interposing relays in industrial control panels worldwide, and for good reason: it simplifies panel design, reduces external suppression components, and is easy to source and replace.

If you have already confirmed this is the correct part for your application, check current pricing and availability for the Omron MY2N-D2 at LeadTime.ca — we ship worldwide.

Who Should Buy the Omron MY2N-D2 — and Who Should Not

The MY2N-D2 is the right choice for control engineers and panel builders who need a proven DPDT plug-in relay with a DC coil, integrated surge suppression, and status indication. It fits naturally into systems already built around Omron PYF-series 8-pin sockets.

  • Your control circuit runs on DC coil voltage — the D2 designation is DC-only (e.g., DC12, DC24, or DC48); confirm your exact voltage before ordering.
  • You need a 2-pole DPDT contact configuration; the MY2N-D2 is an 8-pin relay — not interchangeable with the 4-pole MY4N series.
  • Your panel uses PYF08 or equivalent 8-pin Omron relay sockets; socket compatibility is a hard constraint.
  • You require a built-in diode for coil surge absorption — if your PLC output already handles suppression externally and you do not need the indicator, the plain MY2N may be sufficient.
  • Your load current and voltage fall within the relay's contact ratings for the actual load type — verify resistive versus inductive ratings from the datasheet.
  • Your application requires approvals such as UL or CSA — confirm the exact part number variant carries the required certifications.

If you need four poles, look at the MY4N-D2. If your load exceeds the MY2N-D2 contact ratings or requires safety-rated switching, a contactor or safety relay is the correct choice instead.

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What the MY2N-D2 Actually Does in a Control System

The Omron MY2N-D2 is a general-purpose miniature plug-in power relay from the Omron MY Series. Its primary role in any control panel is galvanic isolation — separating the low-current digital output of a PLC or control circuit from the higher-current field devices it needs to switch. The 2-pole DPDT contact configuration gives you two independent switching circuits in a single compact body, which is useful for control logic that must simultaneously break and make two separate circuits.

What sets the MY2N-D2 apart from the plain MY2N is the "D2" designation, which indicates two specific additions: a built-in flyback diode across the coil for DC surge suppression, and an operation indicator that illuminates when the coil is energized. These two features eliminate the need for an external suppression diode wired across the coil terminals and give technicians an instant visual confirmation of relay state — both of which matter in a dense panel where troubleshooting time is expensive.

The relay is not a PCB-mount device. It is a plug-in relay intended exclusively for use with Omron PYF-series 8-pin sockets. This socket-mount approach means the relay body can be swapped in seconds during maintenance without disturbing any field wiring, since all connections are made at the socket level. Typical DC coil power consumption is approximately 0.9 W, making it compatible with virtually any standard 24 VDC control power supply without derating concerns at typical panel densities.

Typical System Architecture for the MY2N-D2

The MY2N-D2 sits in the signal chain between the PLC digital output module and the field device, acting as the isolation and amplification stage that protects the I/O card while driving loads beyond its direct output capacity.

  • PLC or controller digital output card (24 VDC sourcing or sinking output) energizes the MY2N-D2 coil via the socket coil terminals.
  • The built-in diode suppresses the coil voltage spike at de-energization, protecting the PLC output transistor or relay contact.
  • The MY2N-D2 contacts (wired at the PYF08 socket) switch the load circuit — typically a higher-voltage or higher-current device such as a contactor coil, solenoid valve, or pilot lamp.
  • Downstream load devices receive switched power through the relay contacts, fully isolated from the PLC I/O bus.
  • The operation indicator on the relay body provides local visual feedback without any additional instrumentation.

Where Engineers Deploy the MY2N-D2

The most common deployment for the MY2N-D2 is as an interposing relay between a PLC 24 VDC digital output and a higher-voltage contactor coil. A typical example is a PLC output driving the MY2N-D2 coil, with the relay contacts switching a 230 VAC motor starter coil. This protects the I/O card, provides isolation, and allows the control voltage and load voltage to differ entirely.

In OEM machine building, the MY series has been a standard for decades. Manufacturers standardize on PYF sockets wired into their panels so that field technicians anywhere in the world can swap a faulty relay body in under a minute with a stocked spare. The MY2N-D2 supports exactly this model of serviceability.

Panel builders working on HVAC controls, building automation, water treatment, and packaging equipment use the MY2N-D2 for general switching of solenoid valves, pilot lamps, and small control loads where inductive suppression would otherwise require additional external components. The built-in diode simplifies the panel design and reduces component count.

Retrofit and replacement projects are another strong use case. When an existing panel is already built around PYF08 sockets and Omron MY relays, specifying the MY2N-D2 as a direct replacement is straightforward — the pin layout is compatible, and no socket rewiring is needed as long as the coil voltage matches.

Application Typical Deployment
PLC interposing relay 24 VDC PLC output driving MY2N-D2 coil; contacts switching contactor or solenoid at line voltage
Packaging and conveyor machinery Relay banks on PYF08 sockets for modular signal routing and sequential control logic
HVAC and building controls Switching small motor starters, damper actuators, and pilot lamps within rated contact capacity
OEM machine control panels Standardized MY2N-D2 with PYF sockets enabling fast field swap without rewiring
Retrofit of legacy panels Direct replacement into existing PYF08 bases when coil voltage is confirmed to match
Galvanic signal isolation Isolating PLC I/O from noisy field wiring in water/wastewater and process control cabinets

Key Specifications and Variant Comparison

Parameter Value Notes
Contact configuration DPDT (2-pole, double-throw) 8-pin plug-in body
Coil type DC only D2 = built-in diode; polarity-sensitive wiring required
Coil voltage variants DC12, DC24, DC48 Specify full part number: e.g., MY2N-D2 DC24
Coil power consumption Approx. 0.9 W (typical) Consistent across DC coil variants; confirm per datasheet
Built-in features Coil surge diode + operation indicator Distinguishes D2 from plain MY2N
Mechanical life On the order of 100 million operations No-load condition per datasheet test specification
Electrical life On the order of hundreds of thousands of operations at rated load Dependent on load type and switching frequency
Operating ambient temperature Approx. -55 °C to +60 °C No freezing or condensation; confirm exact range with datasheet
Socket compatibility PYF08 series (8-pin Omron sockets) Including PYF08S, PYF08M, PYF-08-PU and equivalents
Approvals UL, CSA (verify on specific variant) Confirm the exact catalog number carries required certifications

Full technical specifications are available on the product page at LeadTime.ca.

Model Poles Coil Type Built-in Diode Operation Indicator Socket (8-pin) Best For
MY2N-D2 DC24 2-pole DPDT DC only Yes Yes PYF08 PLC interposing, panels needing built-in suppression and indicator
MY2N DC24 2-pole DPDT DC or AC variants available No No PYF08 Applications where external suppression is already provided
MY2N-GS / MY2N-GS-R 2-pole DPDT DC or AC variants Variant-dependent Variant-dependent PYF08 compatible Modernized or finger-safe panel requirements
MY4N-D2 4-pole DPDT DC only Yes Yes PYF14 (14-pin) Applications requiring four switched circuits in one relay body

If your application requires four independent switched circuits, the MY4N-D2 is the correct upgrade path — it is not pin-compatible with the 8-pin MY2N-D2 socket. Check current availability and confirm the right variant at LeadTime.ca.

Expert Verdict: Is the MY2N-D2 the Right Relay for Your Panel?

The Omron MY2N-D2 earns its place on the standard parts list for a specific and well-defined buyer: the controls engineer or panel builder who runs a 24 VDC (or 12/48 VDC) control circuit, uses Omron PYF-series 8-pin sockets, and wants a plug-in DPDT relay that arrives ready to work without requiring external coil suppression components or a separate indicator. The built-in diode is not a minor convenience — it protects the PLC transistor output from the back-EMF spike at coil de-energization, which matters in systems cycling frequently. The approximately 0.9 W coil consumption means it draws very little from the control power supply, and the mechanical life rating on the order of 100 million operations at no load confirms it will outlast most applications before mechanical wear becomes a factor.

Where the MY2N-D2 has real limits is at the boundaries of its contact ratings. If your load is inductive — a solenoid valve, a motor starter coil, a transformer primary — do not size based on the resistive contact rating. The inductive rating is lower, and operating near or above it without proper load-side suppression is the most common cause of premature contact failure reported in the field. For loads that exceed the contact capacity, or for applications requiring functional safety-rated switching or silent operation, the correct path is a contactor, a safety relay, or a solid-state relay respectively. The MY2N-D2 is also not the right choice when you need more than two poles — the MY4N-D2 is the four-pole equivalent, but it uses a different 14-pin socket and is not a drop-in replacement.

From a procurement standpoint, the DC24 variant is the most widely stocked coil voltage at industrial distributors worldwide, and the MY2N-D2 benefits from Omron's broad global distribution footprint. Less common coil voltages such as DC12 or DC48 may carry factory lead times depending on current inventory levels. The single most important step before placing an order is confirming the full part number including the coil voltage suffix — ordering MY2N-D2 DC24 versus MY2N-D2 DC12 versus a plain MY2N are three different parts with different behaviors. A specialist distributor can validate your part number against your socket and control voltage before the order ships, which eliminates the most common and costly ordering mistakes. Review current availability and pricing for the Omron MY2N-D2 at LeadTime.ca — we stock and ship worldwide.

For volume pricing, project quantities, or to confirm lead time before locking in a build schedule, contact the LeadTime.ca team directly — we serve controls engineers and procurement teams worldwide.

What Engineers Are Saying About the Omron MY2N-D2

Across forums including r/PLC, r/automation, PLCTalk, PLCS.net, MrPLC, and distributor Q&A sections, the overall sentiment toward the Omron MY2N-D2 and the broader MY series is consistently positive. Technicians who have worked with these relays over years in control panels describe them as genuinely reliable — the phrase that comes up repeatedly is that they are "workhorses" that go in, do the job, and rarely become the source of an unplanned fault. The operation indicator in particular gets frequent praise from maintenance teams, who note that a quick visual scan of a relay bank tells them immediately which relays are energized without reaching for a meter. The plug-in socket design draws equal praise: when a relay does eventually fail, it takes seconds to swap on a PYF08 base with a spare from the storeroom.

The complaints that surface in community discussions are almost entirely about ordering and application errors rather than product defects. The most frequently mentioned issue is receiving the wrong variant — specifically, ordering a plain MY2N when the MY2N-D2 was needed, or arriving at a site with a DC24 coil relay when the panel runs DC12. Reversed coil polarity on the D2 version is another recurring theme: because the built-in diode makes the coil polarity-sensitive, a technician who wires the coil terminals backwards will find the relay does not energize, and the symptom looks identical to a failed relay or a wiring fault. This catches people who are used to the plain MY2N where polarity does not matter. A smaller but consistent group of complaints involves contact failures on inductive loads — specifically solenoid valve and motor load circuits where the resistive rating was used as the design reference and no load-side suppression was added.

On the sourcing side, buyers report that the DC24 coil variant is genuinely easy to find at most industrial distributors. The less common DC12 and DC48 variants occasionally appear in the ordering mistake category as well — buyers who stock the DC24 variant as a universal spare and then install it on a DC12 control circuit report no operation and spend time troubleshooting before identifying the coil voltage mismatch. The consistent take-away from community experience is that the MY2N-D2 is a low-risk part when specified correctly, and a source of avoidable frustration when the full part number is not verified against the panel schematic before ordering.

Wiring and Installation Overview

The following is a high-level overview for engineers familiar with plug-in relay installation. For full wiring diagrams and terminal torque specifications, refer to the Omron MY2N-D2 datasheet and the applicable PYF socket instruction sheet.

  • The MY2N-D2 mounts into an 8-pin PYF08-series socket — confirm the socket variant (screw terminal, push-in, or finger-safe) matches your panel standard before installation.
  • Coil terminals on the socket must be wired with correct DC polarity; the built-in diode makes the coil polarity-sensitive, and reversed wiring will prevent the relay from energizing.
  • Common, normally open, and normally closed contact terminals are accessed at the socket — verify terminal assignment against the relay body pin diagram and socket wiring diagram, not from memory.
  • Load-side suppression (RC snubber or varistor) should be added across inductive loads such as contactor coils and solenoid valves; the built-in diode suppresses the coil side only and does not protect contacts from load-side inductive spikes.
  • The MY2N-D2 is not an overcurrent protection device — external fusing or a circuit breaker appropriate for the load must be installed upstream; verify protection device sizing against both the load current and the relay contact rating.

Wrong-Part Prevention Checklist Before You Order

Use this checklist before finalizing any purchase order for the Omron MY2N-D2. Each item addresses a real ordering or installation error confirmed in field experience.

  1. Confirm the coil voltage and type: DC only for MY2N-D2; match exactly (e.g., DC24 vs DC12 vs DC48).
  2. Check that the "D2" diode version is required; do not substitute plain MY2N if coil surge suppression is needed.
  3. Verify the relay has the correct number of poles and pin count (MY2N is 2-pole DPDT, 8-pin; not interchangeable with 4-pole MY4N).
  4. Confirm socket compatibility (PYF08 or equivalent 8-pin Omron socket), including any push-in or finger-safe variants your panel uses.
  5. Ensure the load current and voltage are within the relay's contact ratings for the actual load type (resistive vs inductive).
  6. Check environmental requirements (ambient temperature range, panel ventilation) against the datasheet.
  7. Verify any required approvals (UL, CSA, etc.) on the exact part number variant you plan to use.
  8. Make sure coil polarity is respected in your wiring design because the built-in diode makes the relay polarity-sensitive.

If any item on this checklist raises a question before you order, contact the LeadTime.ca team — we can confirm the correct part number, socket compatibility, and current availability before your order ships.

Frequently Asked Questions

Is the MY2N-D2 pin-compatible with a plain MY2N relay in an existing PYF08 socket?

Yes, the MY2N-D2 uses the same 8-pin body and is physically compatible with PYF08-series sockets. However, the D2 version has a polarity-sensitive coil due to the built-in diode. If you are replacing a plain MY2N with an MY2N-D2, verify that the coil wiring at the socket matches the correct DC polarity for the D2 version — this is the most common commissioning issue when making this swap.

Do I still need an external flyback diode on the PLC output when using the MY2N-D2?

The built-in diode in the MY2N-D2 suppresses the coil-side voltage spike when the relay de-energizes, which protects the driving PLC output transistor or relay contact. In most 24 VDC PLC output applications, this eliminates the need for an external flyback diode across the coil. However, always verify with your PLC I/O module documentation whether any additional output protection is specified by the manufacturer.

What is the actual contact rating for inductive loads like solenoid valves?

The MY2N-D2 contact ratings differ between resistive and inductive loads — the inductive rating is lower than the resistive rating. The exact inductive load figures (specified at defined power factor for AC and L/R ratio for DC) are published in the Omron datasheet for the MY2N-D2. Always design to the inductive rating when switching solenoid valves, motor starter coils, or transformer primaries, and add load-side suppression to protect the contacts.

Can I replace a relay from a different brand with the MY2N-D2 without rewiring the socket?

This depends on the existing socket's pin layout and terminal assignment. While some 8-pin DPDT relays from other manufacturers share a similar physical footprint, pin assignments for coil polarity, common, normally open, and normally closed contacts vary by brand and model. Verify the pin diagram of the existing relay and socket against the MY2N-D2 wiring diagram before installing — do not assume physical fit means electrical compatibility.

How often should MY2N-D2 relays be replaced in a high-duty-cycle application?

The electrical life rating is on the order of hundreds of thousands of operations at rated load, while the mechanical life is on the order of 100 million operations under no-load conditions. In high-duty-cycle applications — for example, relays switching multiple times per minute — the electrical life is the limiting factor. Estimate a replacement interval based on your actual switching frequency and load type, keep a visual inspection schedule for indicator and contact condition, and maintain spare stock for rapid replacement.

Which socket variants are compatible with the MY2N-D2?

The MY2N-D2 is designed for Omron PYF08-series 8-pin sockets. Compatible socket variants include the PYF08S (screw terminals), PYF08M (screw clamp), and PYF-08-PU (push-in terminals), as well as finger-safe base options in the same family. Confirm which socket variant your panel uses — the relay body is the same, but socket terminal type affects wiring method and panel certification requirements.

Why Order the Omron MY2N-D2 From LeadTime.ca

  • LeadTime.ca ships the Omron MY2N-D2 and MY series relays worldwide — no geographic restriction on orders.
  • Our team can confirm the correct coil voltage variant and socket compatibility before your order ships, reducing the risk of mis-orders that cause panel downtime.
  • We source hard-to-find coil voltage variants (DC12, DC48) that may be non-stock at general-line distributors.
  • Volume pricing is available for project quantities and OEM stocking orders — contact us to discuss.
  • Fast response on availability questions — we provide live stock confirmation rather than estimate pages.

At-a-Glance Summary

  • The Omron MY2N-D2 is a 2-pole DPDT miniature plug-in power relay with DC coil, built-in surge suppression diode, and operation indicator.
  • Coil voltage variants available: DC12, DC24, and DC48 — always specify the full part number including coil voltage suffix.
  • Designed exclusively for 8-pin PYF08-series Omron relay sockets; not compatible with the 14-pin PYF14 sockets used by the MY4N series.
  • Typical DC coil power consumption is approximately 0.9 W.
  • Mechanical life is on the order of 100 million operations (no load); electrical life is on the order of hundreds of thousands of operations at rated load.
  • Operating ambient temperature range is approximately -55 °C to +60 °C without freezing or condensation.
  • The built-in diode makes the coil polarity-sensitive — reversed wiring prevents operation; mark polarity clearly in panel documentation.
  • Inductive load contact ratings are lower than resistive ratings — always size to the inductive figure and add load-side suppression when switching solenoids, contactor coils, or motor loads.
  • DC24 coil variant is most widely stocked; DC12 and DC48 may require confirmed lead time.
  • UL and CSA approvals available — verify the exact part number variant carries the certifications required for your panel.

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