Omron G2R-2-SND DC24(S) — DPDT Relay Buying Guide

By Abdullah Zahid
15 min read
Omron G2R-2-SND DC24(S) slim plug-in DPDT relay with LED indicator for 24VDC control panels

Omron G2R-2-SND DC24(S) General-Purpose Relay: Specs, Wiring, and Best Alternatives

If you are specifying or replacing a slim, plug-in DPDT relay for a 24 VDC control panel and need integrated LED indication and coil protection in a single device, the Omron G2R-2-SND DC24(S) is the part most engineers reach for first. This member of the G2R-@-S (S) slim power relay family provides two changeover contacts rated at approximately 5 A resistive at 250 VAC or 30 VDC, housed in a 29 × 13 × 35.5 mm body designed for plug-in relay sockets. The built-in diode and LED are what separate this variant from the broader G2R-2-S range — and they are also the source of the most common ordering and wiring mistakes.

If you have already confirmed this is the right part for your panel, check current pricing and availability at LeadTime.ca — ships worldwide.

Who Should Buy the Omron G2R-2-SND DC24(S) — and Who Shouldn't

This relay is the right choice for engineers and panel builders who can confirm all of the following:

  • Your control circuit operates at 24 VDC — not 24 VAC, 12 VDC, or 48 VDC.
  • You need DPDT (2 Form C) contact configuration with approximately 5 A resistive contact rating at 250 VAC or 30 VDC.
  • Your panel uses or will use Omron G2R-compatible plug-in sockets (such as the P2RF-08 series) — this is not a PCB-mount part.
  • You require an LED operation indicator and integrated coil protection diode for visual diagnostics and reduced external component count.
  • Panel density demands a slim 29 × 13 × 35.5 mm form factor to fit compact enclosures.
  • Your loads are within the 5 A resistive rating with proper derating applied for inductive duty.

If your control voltage is AC, your existing panel standardizes on a different relay family footprint, or your loads exceed the contact rating after inductive derating, a different variant or relay family is the correct path. Specific alternatives are covered in the comparison section below.

On this page:

What the Omron G2R-2-SND DC24(S) Actually Does in a Control System

The G2R-2-SND DC24(S) belongs to Omron's G2R-@-S (S) series — a family of slim, general-purpose plug-in relays designed specifically for high-density control panels. The relay's job is straightforward: it accepts a 24 VDC control signal from a PLC output, a relay driver, or a control circuit, and switches two independent sets of contacts to control field loads that the controller cannot drive directly. Those loads might be 120 VAC pilot lights, 24 VDC solenoid valve coils fed through isolated contacts, contactor coils, or status signal circuits — anything within the 5 A resistive contact rating per pole.

The SND designation tells you two things that matter operationally. First, a green LED is integrated into the relay body and illuminates whenever the coil is energized — immediately visible from across a panel, useful during commissioning and fault-finding. Second, a suppression diode is built into the coil circuit, eliminating the voltage spike that a DC coil generates when de-energized. This internal diode removes the need for an external flyback diode on the driver output, but it makes the coil polarity-sensitive. Wire the coil backwards and the relay will not energize. This one fact is behind the majority of installation problems reported with this variant.

Operating temperature range is approximately -40 to +70 °C per the Omron datasheet, making it appropriate for most indoor industrial environments and unheated enclosures where temperature can drop significantly in winter climates.

Typical System Architecture

The G2R-2-SND DC24(S) sits between the controller's digital output section and the field devices it is protecting or switching. In most deployments the signal chain looks like this:

  • PLC or safety relay digital output card (24 VDC sourcing or sinking output) energizes the relay coil.
  • The G2R-2-SND DC24(S), seated in an Omron P2RF-series socket, provides two isolated Form C contacts.
  • Normally open contacts connect to field loads — contactor coils, solenoid valves, motor starters, or pilot devices.
  • Normally closed contacts optionally feed feedback signals or alarm circuits back to the controller.
  • The socket mounts on a DIN rail inside the control panel alongside grouped relay positions in an interposing relay bank.

Typical Applications for the G2R-2-SND DC24(S)

Interposing relay duty is the most common role. When a PLC digital output cannot directly drive a 120 VAC or high-current load, the G2R-2-SND DC24(S) inserts electrical isolation between the controller and the field device, protecting the PLC output card and allowing voltage level translation in the same step. A single relay handles two independent circuits per device, which is useful when one output needs to control both a load and a feedback signal.

In packaging and material handling lines, these relays are used to switch conveyor drive contactors, pneumatic valve solenoids, and position indicator lights — all typical 24 VDC-controlled, low-to-medium current loads well within the 5 A resistive rating. HVAC and building automation panels use them in similar interposing roles between building management system outputs and fan starter coils or damper actuators.

MRO and maintenance teams also stock the G2R-2-SND DC24(S) as a standard spare because so many existing panels in the field were originally built around the G2R-2-S family. A plug-in design means a trained technician can swap a failed relay in under a minute without rewiring the panel, and the P2RF socket retains all field wiring permanently.

Water and wastewater treatment plants and food and beverage facilities use these relays extensively in process control panels where hygienic-area field devices are controlled from 24 VDC PLCs located in clean side enclosures.

Application Typical Deployment
PLC interposing relay bank DPDT isolation between 24 VDC PLC output cards and 120/240 VAC contactor coils
Packaging machine control panel Switching pneumatic valve solenoids and conveyor pilot devices from 24 VDC control logic
HVAC control panel Interposing between BMS digital outputs and fan motor starters or damper actuators
Process control relay cabinet Contact multiplication for alarm and status signals across multiple field circuits
MRO spare parts replacement Direct plug-in swap of failed G2R-2-S family relays in existing G2R socket banks
Water and wastewater treatment Isolating process pump and valve control circuits from 24 VDC control system outputs

Key Specifications and Contact Ratings

Parameter Value Notes
Contact configuration DPDT (2 Form C) Two independent changeover contacts
Rated contact current (resistive) Approx. 5 A At 250 VAC or 30 VDC per pole
Switching capacity Around 1.25 kVA / 150 W At rated resistive load
Rated coil voltage 24 VDC Polarity-sensitive due to built-in diode
Coil resistance Approx. 1.1 kΩ Per Omron datasheet
Coil power consumption Around 0.5–0.6 W DC coil; relevant for PLC output sizing
Indication and protection LED indicator + built-in diode SND variant; diode is polarity-sensitive
Mounting style Plug-in for G2R sockets Compatible with Omron P2RF-08 series
Body dimensions 29 × 13 × 35.5 mm Slim form factor for dense panel layouts
Operating temperature Approx. -40 to +70 °C Non-condensing; per Omron datasheet

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

G2R-2-SND vs Other G2R Variants: Which One Do You Actually Need?

The G2R-@-S (S) family covers a range of coil voltages and feature combinations. Understanding the naming convention prevents the most common ordering error in this product line.

Model Coil Voltage LED Indicator Built-in Diode Mounting Best For
G2R-2-SND DC24(S) 24 VDC Yes Yes (polarity-sensitive) Plug-in socket 24 VDC panels needing LED + diode in one device
G2R-2-SN DC24(S) 24 VDC Yes No Plug-in socket 24 VDC panels needing LED but no polarity sensitivity
G2R-2-S DC24(S) 24 VDC No No Plug-in socket Basic plug-in switching where no indication is needed
G2R-2-SNDI DC24(S) 24 VDC Yes Yes (inverse) Plug-in socket Panels requiring inverse polarity coil wiring with LED
G2R-2-SND DC12(S) 12 VDC Yes Yes Plug-in socket 12 VDC control systems with same indication requirements
G2R-2 (PCB) Various No No PCB-mount pins Board-level mounting; incompatible with G2R sockets

If your control voltage is not 24 VDC, or if you are retrofitting a panel that does not use Omron G2R sockets, the G2R-2-SND DC24(S) is not the correct selection regardless of how close the contact ratings appear. Check current variant availability at LeadTime.ca or contact the team to confirm the right part number before ordering.

Expert Verdict: Is the G2R-2-SND DC24(S) the Right Relay for Your Panel?

For control engineers specifying 24 VDC interposing relay banks, the Omron G2R-2-SND DC24(S) earns its place as a reliable default choice. The combination of a slim 29 × 13 × 35.5 mm body, DPDT contact configuration, integrated LED, and built-in coil protection diode addresses the practical needs of dense panel layouts without requiring external suppression components. The approximately 5 A resistive contact rating handles the vast majority of standard interposing duty — contactor coils, valve solenoids, pilot devices — and the -40 to +70 °C operating range covers all but the most demanding thermal environments. Panel builders who have standardized on the G2R-2-S family benefit from consistent socket compatibility, fast plug-in replacement, and the mechanical operation indicator that makes commissioning faster on multi-relay banks.

Where this relay has genuine limits: loads with significant inrush or continuous inductive current should be evaluated against the derated contact life, not the headline 5 A resistive figure. If your load profile includes larger motor starters or high-cycling solenoids, a relay with a higher contact rating is the more durable choice. If your control circuit is AC, no version of the G2R-2-SND applies — look to AC coil variants within the G2R family or to a different relay series entirely. Engineers who have already standardized on the Omron MY2 or LY family should also weigh the socket rework cost against the value of switching to G2R, particularly in retrofit projects where existing socket bases are already wired and mounted.

From a procurement perspective, the G2R-2-SND DC24(S) is a commonly stocked industrial relay with reasonably predictable availability under normal supply conditions, though extended lead times are possible during supply constraints or for large volume orders. The risk with this SKU is not typically availability — it is ordering the wrong variant. The SND designation, coil voltage suffix, and plug-in versus PCB distinction are all places where a BOM error shows up at commissioning rather than at goods receipt. Ordering through a specialist industrial distributor who can validate the part number, confirm socket compatibility, and flag polarity requirements before the order ships reduces that risk significantly. View current pricing and stock status for the G2R-2-SND DC24(S) at LeadTime.ca — available for worldwide shipment.

For volume pricing, lead time confirmation before committing to a build schedule, or help identifying the correct variant for a specific application, contact the LeadTime.ca team directly — we ship worldwide.

What Engineers Need to Know Before Ordering the G2R-2-SND DC24(S)

Community feedback from automation forums including Reddit r/PLC, r/automation, PLCTalk, PLCS.net, and MrPLC consistently describes the Omron G2R-2 family as a dependable workhorse in industrial control panel duty. The combination of LED and mechanical flag indication draws repeated praise from engineers who have used these relays in dense interposing relay banks — both features make fault isolation faster during commissioning and maintenance, particularly when a single failed relay in a bank of twenty needs to be identified quickly without a meter. The slim plug-in design and the wide availability of P2RF sockets make standardization straightforward, and the G2R family's long track record in industry means technicians recognize and understand the hardware.

The recurring warnings in community discussions are specific and actionable. Coil polarity issues with SND variants are the most frequently cited installation problem. Engineers retrofitting panels that were originally built with non-diode G2R relays, or technicians following wiring diagrams from an older version of a panel, will occasionally connect the coil terminals without attention to polarity — and the relay will not energize. The internal diode blocks the coil current when wired backwards without damaging anything, but it creates a diagnostic puzzle if the technician does not know the SND variant is polarity-sensitive. The second most common community warning is contact life in inductive applications: the 5 A resistive rating does not translate directly to 5 A inductive, and users report premature contact wear when the relay is applied at or near its rated figure on motor or solenoid loads without proper derating.

Ordering errors follow a predictable pattern. The three most commonly reported mistakes are receiving a G2R-2 PCB-mount part instead of the plug-in G2R-2-SND (different pin configuration, incompatible with G2R sockets), discovering a coil voltage mismatch at commissioning when the wrong voltage suffix was carried through from a BOM, and installing SND variants in place of non-diode versions without updating the wiring to account for polarity. All three are avoidable with explicit part number verification at the BOM stage and a pre-order confirmation step with a distributor who can catch variant-level errors before the parts ship to site.

Wiring and Installation Overview

The following points cover the key requirements for installing the G2R-2-SND DC24(S) correctly. Engineers requiring full wiring procedures and terminal diagrams should refer to the Omron G2R-@-S (S) series datasheet and the applicable socket wiring diagram.

  • Identify coil terminals on the socket diagram before wiring; the SND variant requires correct polarity — positive to the designated positive coil terminal — or the internal diode will block coil energization.
  • Connect the 24 VDC coil supply within the rated voltage tolerance; confirm the driver or PLC output can supply approximately 46–50 mA continuously at 24 VDC given the approximately 0.5–0.6 W coil power consumption.
  • Wire NO and NC load contacts through the corresponding socket terminals per the socket diagram; keep high-voltage load conductors physically separated from low-voltage control wiring where the socket layout permits.
  • Seat the relay body fully into the socket until it latches; verify the mechanical operation indicator is in the de-energized position before applying power.
  • On first energization, confirm the LED illuminates and the mechanical flag changes position; use a multimeter to verify contact state change if load circuits are not yet connected.

Wrong-Part Prevention: Confirm These Before You Order

The following checklist maps directly to the most common ordering and installation errors for the Omron G2R-2-SND DC24(S). Verify every item against your design before finalizing the BOM.

  1. Confirm control voltage: 24 VDC coil required; do not use with 24 VAC or other DC voltages.
  2. Check coil polarity and diode: SND variants include a polarity-sensitive diode; ensure your wiring and driver can support this.
  3. Verify contact form and load: DPDT, 5 A resistive rating is sufficient for your load type (check inductive/inrush derating).
  4. Confirm mounting: you need plug-in base compatibility (G2R socket type), not PCB-pins or different relay family.
  5. Check need for LED indicator: if operator feedback is required, keep SND; if not, consider versions without LED/diode.
  6. Match socket series: ensure you have the correct Omron socket (e.g., P2RF-08 series for G2R-2) and accessories for your panel layout.

If you have worked through this checklist and the G2R-2-SND DC24(S) meets every criterion, view current stock and pricing at LeadTime.ca. If any item raises a question about the correct variant, contact the LeadTime.ca team before ordering — variant-level errors on relay orders are one of the most common causes of commissioning delays.

Frequently Asked Questions

How do I correctly wire the G2R-2-SND DC24(S) coil given the built-in diode and LED?

The SND variant is polarity-sensitive because the internal diode is wired in parallel with the coil for transient suppression. You must connect the positive 24 VDC supply to the positive coil terminal as marked on the socket diagram — wiring it in reverse will cause the diode to block coil current and the relay will not energize, with no LED illumination. Always mark coil polarity explicitly on your panel schematics and train installation technicians that SND relays behave differently from non-diode versions.

Which socket series is compatible with the G2R-2-SND DC24(S), and can I reuse sockets from other Omron relay families?

The G2R-2-SND DC24(S) is designed for use with Omron's P2RF-08 series sockets, which are specifically matched to the G2R-2 plug-in relay family. Sockets from other Omron relay families such as the MY or LY series use different pin arrangements and are not interchangeable. Before retrofitting a panel that previously used a different relay series, verify the socket footprint and pin-out against the G2R-2-SND datasheet.

Can the G2R-2-SND DC24(S) switch inductive loads like motor starters and solenoids, and how should I derate the contacts?

The relay can switch inductive loads, but the approximately 5 A resistive rating does not apply directly to inductive or high-inrush applications. Inductive loads generate voltage spikes and arcing at contact opening that accelerate contact wear; the Omron datasheet provides load-specific derating curves and switching capacity limits by load type. For motor loads or solenoids cycling frequently, apply the inductive load derating from the datasheet, add appropriate arc suppression on the load side, or consider a relay with a higher contact rating if the derated value does not provide adequate margin.

What is the practical difference between the G2R-2-SN and G2R-2-SND variants?

Both are slim plug-in 24 VDC DPDT relays with an LED indicator, and both use the same G2R socket family. The difference is that the G2R-2-SND includes a built-in suppression diode across the coil, while the G2R-2-SN does not. The presence of the diode in the SND makes the coil polarity-sensitive and eliminates the need for an external flyback diode on the driver. If your driver circuit or PLC output card already includes internal protection, or if your wiring standard does not clearly mark polarity, the G2R-2-SN may introduce fewer installation complications in some retrofit scenarios.

How long do G2R-2-S series relays typically last, and what indicates a relay needs replacement?

The G2R-@-S (S) series is specified for a mechanical life in the tens of millions of operations and an electrical life in the hundreds of thousands of operations at rated resistive load per Omron documentation. Electrical life is the practical limiting factor in most panel applications and is highly dependent on actual load type, current level, and switching frequency. Signs that replacement is warranted include slow or inconsistent contact actuation, high contact resistance measured with a multimeter, visible arc damage on contacts, or the relay failing to hold in at rated voltage — all of which can be diagnosed in place using the LED and mechanical indicator before pulling the relay.

Is the G2R-2-SND DC24(S) a direct replacement for a failed G2R-2-SN or G2R-2-S in an existing panel?

It is a physical fit in the same P2RF socket, but substituting an SND for a non-SND version requires updating the coil wiring to respect polarity. If the existing panel wiring does not clearly mark coil polarity or if the original relay was wired without polarity attention, swapping in an SND variant may result in a relay that does not energize until the coil wiring is corrected. Confirm the wiring diagram before substituting across the SND and non-SND variants.

Why Order Through LeadTime.ca

  • LeadTime.ca ships industrial automation components worldwide — no regional restrictions on ordering.
  • Specialist team can confirm the correct variant, coil voltage, and socket compatibility before your order is placed, reducing the risk of wrong-part errors on relay SKUs with multiple close variants.
  • Hard-to-find or low-inventory parts can be sourced or cross-referenced to available alternatives when lead times are extended.
  • Volume pricing is available for BOM orders and MRO stocking programs — contact the team for current pricing on larger quantities.
  • View the G2R-2-SND DC24(S) product page for current pricing and availability.
  • Contact the LeadTime.ca team for volume quotes, lead time confirmation, or help selecting the correct variant.

At-a-Glance Summary

  • Official product: G2R-@-S (S) General-purpose Relay, 2-pole, slim, plug-in, LED and diode — catalog number G2R-2-SND DC24(S).
  • Contact configuration: DPDT (2 Form C), approximately 5 A resistive at 250 VAC or 30 VDC per pole.
  • Switching capacity: around 1.25 kVA or 150 W at rated resistive load.
  • Coil: 24 VDC rated, approximately 1.1 kΩ resistance, approximately 46–50 mA coil current, around 0.5–0.6 W power consumption.
  • Indication and protection: integrated LED operation indicator and built-in polarity-sensitive suppression diode — both standard on the SND variant.
  • Mounting: plug-in type, compatible with Omron P2RF-08 series sockets.
  • Body dimensions: 29 × 13 × 35.5 mm slim form factor for dense control panels.
  • Operating temperature: approximately -40 to +70 °C per Omron datasheet.
  • Mechanical life: tens of millions of operations; electrical life: hundreds of thousands of operations at rated load.
  • Primary ordering risk: coil polarity wiring error due to built-in diode, and variant confusion between SND, SN, and PCB-mount G2R-2 versions.

You may also be interested in: