Omron H3CR vs H3Y vs H3RN Timer Relays: Which Is Right for You?

By Abdullah Zahid
18 min read
Omron H3CR H3Y H3RN solid-state timer relays side by side for industrial control panel comparison

Omron H3CR vs H3Y vs H3RN Timer Relays Comparison Guide: Which Omron Timer Is Right for Your Panel?

Controls engineers and panel builders searching for the right Omron timer relay frequently land at the same decision point: the H3CR Solid-state Timer, the H3Y Miniature Timer, and the H3RN Ultra-slim Timer each solve a real industrial timing problem, but they solve different ones. Whether you are designing a new control panel, retrofitting aging mechanical timers, or standardizing a relay bank around Omron G2R sockets, the choice between these three families comes down to mounting format, functional flexibility, and footprint — not quality. All three are solid-state timer relays intended for industrial control applications.

If you have already identified the series you need, check current pricing and availability at LeadTime.ca — we ship worldwide.

Which Omron Timer Series Fits Your Application?

This comparison is most useful if your application matches at least three of the following criteria for the series you are considering.

Choose the H3CR Solid-state Timer if:

  • Your panel supports a 48 x 48 instrument format or appropriate plug-in bases for the H3CR family
  • You need multiple timer functions — ON-delay, OFF-delay, interval, flicker — from a single unit with front-accessible selectors
  • Technicians will need to adjust time settings during commissioning or maintenance without panel redesign
  • You are retrofitting older mechanical timers and want future flexibility to change timing logic

Choose the H3Y Miniature Timer if:

  • You need a compact, plug-in miniature timer on standard relay socket strips
  • The timing function is known and fixed — a specific ON-delay or OFF-delay per catalog number
  • Space is limited but not extremely narrow, and you want a straightforward, cost-effective solution

Choose the H3RN Ultra-slim Timer if:

  • Your panel is built around Omron G2R relays on P2R or P2RF sockets
  • Panel width is critically constrained and ultra-slim device profiles are required
  • You want a timer that integrates directly into relay socket banks without additional bases

If none of these fit cleanly, contact the LeadTime.ca team to confirm the right series before ordering.

On this page:

What Each Timer Actually Does in an Industrial Panel

All three series are solid-state timer relays intended for industrial control applications — the fundamental timing function is the same family of tools. What separates them is the problem each one is optimized to solve at the panel design level.

The H3CR Solid-state Timer is the configurable workhorse. It is designed for panels where the engineer or technician needs visible front-panel access to mode selectors and time dials, and where the same physical unit may need to serve different functions — ON-delay today, interval tomorrow — without rewiring. Multi-function capability in a single catalog unit reduces the number of spare part types a facility needs to stock.

The H3Y Miniature Timer is built for simplicity in a small body. It plugs into standard relay sockets and performs a fixed timing function determined by the catalog suffix. The appeal is straightforward: a known function, a compact footprint, and clean plug-in wiring in relay-heavy panels. Engineers who have already defined the exact sequence choose H3Y for its uncomplicated deployment.

The H3RN Ultra-slim Timer exists to solve a specific mechanical design problem. When a panel is built around Omron G2R relays on P2R or P2RF sockets and width is the binding constraint, the H3RN plugs directly into those same sockets using a pin configuration compatible with G2R relays. The result is a timer that integrates into an existing relay bank without dedicated timer bases, extra wiring runs, or additional panel real estate.

Where These Timers Sit in a Typical Control System

All three series live in the relay logic layer of a control panel — between the control power supply and the field device output — functioning as the timed switching element in a sequence or interlock circuit.

  • Control power supply (AC or DC, matched to selected timer variant) feeds the timer coil circuit
  • A trigger input — typically from a pushbutton, PLC output, or upstream relay contact — initiates the timing cycle
  • The timer relay (H3CR, H3Y, or H3RN depending on format and function requirement) counts the programmed delay
  • On timeout or during interval, the timer's output contact switches — closing or opening the downstream load circuit
  • Downstream devices — contactors, pilot lights, solenoids, signal relays — respond to the timed contact output

Typical Applications and Deployment Scenarios

Conveyor systems represent one of the most common deployments for all three series. Delay start and stop logic for conveyor drives, where a timed pause prevents mechanical shock, can be handled by any of the three — the choice depends on whether the engineer needs adjustable delay (H3CR), a fixed known delay on a relay board (H3Y), or a narrow panel with G2R relay sockets (H3RN).

Pump run-on timers in water, wastewater, and HVAC applications frequently use H3Y or H3RN for their fixed OFF-delay function. Where the run-on time is process-defined and unlikely to change, the fixed-function simplicity of H3Y is valued. Where the panel is built around G2R relay banks, H3RN provides the same function with a thinner profile.

Food and beverage and packaging machinery panels often use H3CR for multi-step sequence timing where production engineers may need to fine-tune delays during commissioning. The front-dial accessibility of H3CR suits environments where line technicians — not just engineers — need to make adjustments without opening schematics.

Material handling and building automation applications that use relay logic panels with dense relay socket strips benefit from H3RN when width is the binding design constraint and the relay bank is already standardized on Omron G2R relays and P2R/P2RF sockets.

Application Typical Deployment
New control panel with multiple adjustable delays H3CR — multi-function, front-dial access, supports commissioning changes
Relay board with simple ON-delay logic and limited space H3Y — miniature plug-in format on standard relay sockets
Narrow panel with Omron G2R relays on P2R/P2RF sockets H3RN — ultra-slim, G2R-compatible pin configuration, no extra bases needed
Pump run-on or warning light delay in a small junction box H3Y (standard sockets) or H3RN (G2R socket banks), fixed OFF-delay function
Retrofit of older mechanical panel timers with unknown future requirements H3CR — multi-function timer allows logic changes without rewiring
OEM machine panel standardizing on one Omron timer family H3CR or H3Y depending on space; H3RN for G2R socket-standardized designs

Core Specification Comparison: H3CR vs H3Y vs H3RN

Specification Aspect H3CR Solid-state Timer H3Y Miniature Timer H3RN Ultra-slim Timer
Series role Panel-mount / plug-in, multi-function industrial timer Miniature plug-in timer for compact, basic delays Ultra-slim timer for G2R relay socket banks
Timer type Solid-state Solid-state Solid-state
Mounting format Panel cutout (48 x 48) or plug-in base depending on variant Plug-in via relay sockets on DIN rail or panel Plug-in to P2R/P2RF sockets; G2R pin configuration
Timer functions ON-delay, OFF-delay, interval, flicker (model-dependent, via front selector) Fixed function per catalog number (e.g., ON-delay or OFF-delay) Multiple operating modes available for specific H3RN variants
Time ranges Fractions of a second to hours (variant-dependent, multi-range) Fractions of a second to minutes (model-dependent, typically fixed or limited range) 0.1 s to 10 min and 0.1 min to 10 h with selectable maxima (1 s, 10 s, 1 min, 10 min, 1 h, 10 h)
Supply voltage AC and DC variants available (variant-specific) AC and DC variants available (variant-specific) AC/DC options as specified in H3RN datasheet
Output type Relay output contacts (poles and ratings variant-dependent) Relay output (DPDT or 4PDT configurations, variant-dependent) Relay output contacts per H3RN datasheet specifications
Front adjustment Front dials and mode selectors; clear scale indication Simple scale setting; limited front controls Compact front range selectors on ultra-slim body
Standards conformance Omron industrial timer family literature Omron industrial timer family literature EN61812-1 and IEC60664-1 insulation requirements confirmed in datasheet
Typical market position Feature-rich; chosen for flexibility over lowest unit cost Value-oriented for simple delays in compact formats Specialized for ultra-slim socket-based applications

Full technical specifications, including all catalog variant details and contact ratings, are available on the product pages at LeadTime.ca.

Timer Functions and Operation Modes Compared

The function comparison is where engineers most often make specification errors, so it deserves direct treatment.

The H3CR Solid-state Timer is the multi-function option. Depending on the specific H3CR model, functions including ON-delay, OFF-delay, interval, and flicker are selectable via a front-panel mode selector — a single unit can be reconfigured in the field. This is the primary reason engineers choose H3CR for panels where timing logic may change during commissioning or future modifications.

The H3Y Miniature Timer uses a fixed-function-per-model approach. The catalog suffix determines whether a given H3Y unit is an ON-delay timer or an OFF-delay timer — you cannot switch between modes once the unit is ordered. This is not a deficiency; it is a deliberate design for applications where the timing function is known, stable, and does not need to change. The tradeoff is that stocking multiple functions means stocking multiple part numbers.

The H3RN Ultra-slim Timer offers multiple operating modes for specific H3RN variants, making it more flexible than a purely fixed-function device while maintaining its ultra-slim, socket-compatible format. The H3RN datasheet is the definitive reference for which modes are available on which variant — do not assume all H3RN catalog numbers share identical functionality.

A practical rule: choose a multi-function timer (H3CR, or applicable H3RN variants) when the timing sequence may change, when spares inventory must be minimized across functions, or when field technicians need reconfiguration ability. Choose fixed-function (H3Y) when the sequence is fully defined, simplicity in ordering and installation is the priority, and the catalog number itself documents the function.

Time Ranges and Adjustment: Which Series Covers Your Process Delay?

The H3RN Ultra-slim Timer has the most clearly documented range data available from the brief. It offers time ranges of 0.1 s to 10 min and 0.1 min to 10 h, with selectable maximum settings of 1 s, 10 s, 1 min, 10 min, 1 h, and 10 h — making it suitable for both very short cycle timing and multi-hour process delays in a single compact unit.

The H3CR Solid-state Timer family covers multi-range capability from fractions of a second up to hours depending on the H3CR model selected. Front dials and range selectors allow both coarse range selection and fine time adjustment, which is why it is the preferred choice for commissioning-intensive applications where the exact delay is dialed in after installation.

The H3Y Miniature Timer typically covers ranges from fractions of a second to tens of seconds or minutes, with the available range fixed or limited compared to H3CR multi-range designs. This is appropriate for the applications H3Y is designed for — short-to-medium delays in compact relay panels — but it is a genuine constraint to verify if your process requires delays of an hour or more.

The selection principle is straightforward: calculate or measure the required process delay, confirm the chosen series covers it with adjustment margin, and verify that the resolution of the range selector gives adequate fine control. If a process needs a delay of several hours and adjustment resolution matters, H3CR or the applicable H3RN range is the correct direction.

Form Factor, Mounting, and Panel Footprint Side by Side

This is the dimension of the decision that most directly drives panel redesign if you get it wrong. The three series are not interchangeable mechanically.

The H3CR Solid-state Timer is designed for a 48 x 48 panel cutout format or appropriate plug-in bases, depending on the variant. The front face is designed for visibility and field access — dials are sized to be read and adjusted without removing the unit. This format works well in instrument-style panels where timers share a fascia with meters and selectors, but it consumes meaningful panel area that compact relay boards cannot spare.

The H3Y Miniature Timer is a true miniature plug-in device. It mounts via relay socket strips on DIN rail or panel, and its compact body suits relay-board-style layouts where multiple timers and relays occupy a shared socket strip. The plug-in format also simplifies replacement — unplug, swap, replug — without disturbing adjacent wiring.

The H3RN Ultra-slim Timer takes panel compactness further. Its ultra-slim profile and G2R-compatible pin configuration allow it to mount directly to P2R and P2RF sockets alongside G2R relays, eliminating the need for dedicated timer bases. In relay banks where every millimetre of width matters, H3RN preserves the panel layout without creating a wider or deeper footprint than the relays it sits beside. The tradeoff noted in community use is that tight spacing makes labeling and in-panel adjustment physically more challenging.

Aspect H3CR Solid-state Timer H3Y Miniature Timer H3RN Ultra-slim Timer
Mounting type Panel cutout (48 x 48) or plug-in base (variant-dependent) Plug-in relay socket strips on DIN rail or panel P2R/P2RF sockets; G2R-compatible pin configuration
Profile Instrument panel format, front-access dials Miniature body, compact relay board format Ultra-slim body designed for relay socket banks
Adjustment access Clear front dials and mode selectors; field-adjustable Simple scale; limited front controls Compact front range selectors; tighter physical access
Wiring method Panel terminals or plug-in base screw terminals Plug-in socket; screw terminal strip wiring Plug-in to P2R/P2RF sockets; no extra bases required
Indication Front LEDs for timing and output state (variant-dependent) Basic indication per series datasheet (variant-dependent) LED indicators for power and output per H3RN datasheet

If you are not certain which mounting format your panel or socket strip supports, contact the LeadTime.ca team before placing an order — mechanical mismatches are among the most common and most avoidable sourcing errors with timer relays.

Expert Verdict: H3CR, H3Y, or H3RN for Your Project?

The H3CR Solid-state Timer earns its position as the default choice for engineers who need flexibility, field adjustability, and multi-function capability in a panel instrument format. If there is any chance the timing function or range will change — during commissioning, process optimization, or future modification — H3CR is the lower-risk specification. The 48 x 48 front-panel format also means technicians can read and adjust settings without needing to trace wiring or consult the schematic every time. For retrofit projects replacing older mechanical timers where future timing logic is unknown, H3CR is consistently the safer bet.

Where H3CR is not the right choice is equally important to state clearly. In a dense relay board or a narrow panel where the 48 x 48 cutout format cannot be accommodated, H3CR simply does not fit mechanically. If the timing function is already defined and will not change, the multi-function flexibility of H3CR provides no value over the simpler H3Y. And in panels standardized on Omron G2R relays and P2R/P2RF sockets, H3RN is the engineered answer — it exists precisely for that layout. Using H3CR or H3Y in a G2R socket bank adds bases, wiring complexity, and width that H3RN eliminates.

From a procurement standpoint, all three series are part of the active Omron timer relay lineup, and availability should be confirmed with a distributor before standardizing on a family for a multi-panel project. Lead times can vary by series and variant, and confirming stock before finalizing a bill of materials avoids schedule risk. LeadTime.ca sources Omron timer relays for engineers and buyers worldwide — check current pricing and availability for the H3CR, H3Y, and H3RN families directly on the product pages at LeadTime.ca, or contact the team if you need to match a timer series to an existing socket or panel format.

For volume pricing, lead-time confirmation, or help verifying the right catalog number before committing to a build, contact the LeadTime.ca team directly — we ship worldwide.

What Engineers Say About These Timers in the Field

Feedback from controls engineering communities — including discussions on r/PLC, r/automation, PLCTalk, PLCS.net, and MrPLC — reflects consistent satisfaction with all three series, with selection questions centering almost entirely on mechanical format and function rather than reliability concerns. No series draws significant quality complaints; the issues that surface are almost always about choosing the wrong family for the application or the wrong catalog number within a family.

H3CR users consistently cite its versatility as the primary reason they specify it. The ability to reconfigure function from the front panel reduces the number of distinct part numbers required in a spare parts cabinet, and technicians familiar with the front-dial format appreciate being able to verify and adjust settings quickly during a production fault. The recurring complaint is space — the 48 x 48 format is incompatible with very compact installations, and some engineers note that crowded panels make even the accessible front dial harder to reach than expected.

H3Y feedback emphasizes compactness and wiring simplicity. Engineers who work on relay-board-style panels value the plug-in format and the clean socket strip layout. The note that comes up repeatedly is the fixed-function-per-catalog-number characteristic: engineers who assumed all H3Y models share the same function ordering report having to re-order after receiving an ON-delay unit when they needed OFF-delay, or vice versa. H3RN draws positive comments specifically from engineers working in Omron G2R socket banks — the ultra-slim body and direct socket compatibility simplify the panel layout noticeably. The acknowledged tradeoff is that tight spacing makes labeling physically challenging, and maintenance technicians less familiar with H3RN than with H3CR or H3Y occasionally need additional orientation during troubleshooting.

Wiring, Terminals, and Socket Compatibility Overview

  • H3CR uses panel cutout terminals or plug-in base screw terminals depending on the variant — verify whether your panel design uses a cutout instrument or a base-mounted approach before ordering, as these are not interchangeable.
  • H3Y plugs into standard relay socket strips; confirm socket type compatibility with the specific H3Y catalog number, especially when replacing existing timers, as multi-pole configurations (DPDT vs 4PDT variants) have different footprints and pin arrangements.
  • H3RN uses a pin configuration compatible with G2R relays and mounts to P2R and P2RF sockets — do not attempt to mount H3RN to socket types not designed for this pin configuration; mismatches can create wiring errors that are difficult to trace.
  • For all three series, confirm that the supply voltage wiring to the timer coil circuit matches the exact voltage variant ordered — AC and DC variants exist and are not interchangeable in the same socket.
  • Output contact wiring should be verified against load type and switching current; refer to the specific datasheet for the catalog number specified, as contact ratings vary across variants within each series.

Migrating Between Series: What to Verify Before Swapping

Switching between timer series is a common maintenance and standardization activity, but it is not a direct swap without verification. The three series differ mechanically and functionally in ways that matter.

Moving from an H3Y to an H3RN when panel width becomes critical is a recognized migration path reported in field experience. The key verification steps are confirming that P2R or P2RF sockets are present or will be installed, matching the timing function and range of the replacement H3RN to what the H3Y was performing, and confirming that supply voltage and contact ratings are aligned. The sockets are not the same, so a physical base change is required.

Migrating from older mechanical panel timers to H3CR for more stable electronic timing is also well-documented. The primary verification is confirming the panel cutout size and available depth, as mechanical timers may have used a different format. The time function and range of the H3CR variant must match what the mechanical timer was doing, and the output contact wiring must be verified against the new relay configuration.

H3CR cannot be substituted directly for H3Y or H3RN in the same socket without a base change and panel modification. These series are not mechanically interchangeable, and treating them as drop-in replacements for each other is the source of the most common wiring errors during panel modification.

Wrong-Part Prevention Checklist

Before finalizing any Omron timer relay order across the H3CR, H3Y, and H3RN families, verify all of the following:

  1. Confirm you have the correct mounting (panel cutout vs DIN rail vs socket) before selecting a series.
  2. Verify the timer function (e.g., ON-delay vs OFF-delay) in the exact model suffix; do not assume all variants are multi-function.
  3. Check the required time range; some variants only support short ranges while others reach hours.
  4. Confirm supply voltage compatibility with the control circuit (AC vs DC and specific ratings).
  5. Verify output contact type and rating against load (relay output vs solid-state and switching current).
  6. Ensure the chosen timer physically fits next to existing hardware (relay banks, terminal blocks, etc.).
  7. Check local availability in Canada before standardizing on one series for multi-panel projects.

If any item on this checklist cannot be confirmed from your existing documentation, contact the LeadTime.ca team before ordering — we can help match the right catalog number to your panel layout and socket configuration.

Frequently Asked Questions

Can I replace an H3Y timer with an H3RN in an existing panel without changing the socket?

No — H3Y and H3RN use different socket types. H3RN is designed for P2R and P2RF sockets with a pin configuration compatible with G2R relays, while H3Y uses standard miniature timer relay sockets. A direct swap requires replacing the socket base, not just the timer body. Verify function, time range, and voltage compatibility in the replacement before making the change.

Which Omron timer series supports the longest timing ranges?

The H3RN Ultra-slim Timer is documented to support ranges up to 10 h, with selectable maxima of 1 min, 10 min, 1 h, and 10 h on the longer-range scale. The H3CR Solid-state Timer family also covers multi-hour ranges depending on the specific variant selected. The H3Y Miniature Timer typically covers shorter ranges from fractions of a second to minutes — if your process requires multi-hour delays, verify the specific model's range before ordering.

How do I know what timer function a specific H3CR or H3Y catalog number provides?

The timer function is encoded in the model suffix. For H3Y, the suffix directly indicates whether the unit is an ON-delay, OFF-delay, or other function — there is no front-panel mode selector to change this. For H3CR, multi-function variants allow mode selection via a front selector, but the available modes depend on the specific H3CR model. Always cross-reference the exact catalog number against the current Omron datasheet before ordering.

Are H3CR, H3Y, and H3RN interchangeable on the same sockets?

No. These three series use different mounting formats and socket types and are not mechanically interchangeable. H3CR uses a 48 x 48 panel cutout or its own plug-in base, H3Y uses standard miniature relay sockets, and H3RN uses P2R/P2RF sockets with G2R-compatible pin configuration. Standardizing on one series for a panel project is the correct approach; mixing series in the same socket strip is not supported.

Which series is most practical for technicians to adjust during troubleshooting in the field?

H3CR is generally the most accessible for field adjustment, with clearly labeled front dials and mode selectors visible from the panel fascia. H3RN's compact front range selectors are functional but physically tighter to access in dense relay banks. H3Y offers limited front controls by design, as its function is fixed per catalog number and not intended for on-site reconfiguration. For applications where technicians regularly verify or adjust timing without engineering support, H3CR provides the clearest interface.

Should I standardize my next panel build on H3CR, H3Y, or H3RN to simplify future maintenance?

The answer depends on panel format. If your panels use instrument-style cutouts and multiple timer functions, H3CR standardization reduces spare part complexity because one part number can serve multiple functions. If your panels use relay socket strips and all timing logic is fixed-function, H3Y or H3RN standardization simplifies ordering and replacement. H3RN standardization is most logical when the entire relay bank is already built around Omron G2R relays on P2R/P2RF sockets. Check availability and lead times for the chosen series before committing to a standard for multi-panel programs.

Why Order From LeadTime.ca

  • LeadTime.ca sources Omron timer relay families including H3CR, H3Y, and H3RN for engineers and buyers worldwide, not limited to any single region
  • The team can help verify socket compatibility, mounting format, and catalog number match before an order is placed — reducing the risk of mechanical mismatches
  • Volume pricing and lead-time confirmation are available for multi-panel or OEM builds; contact the team directly for project-level sourcing
  • Hard-to-find variants and less-common catalog numbers within the Omron timer family are actively sourced

At-a-Glance Summary

  • H3CR Solid-state Timer: panel cutout (48 x 48) or plug-in base, multi-function (ON-delay, OFF-delay, interval, flicker depending on model), multi-range from fractions of a second to hours, front dials and mode selectors for field adjustment
  • H3Y Miniature Timer: miniature plug-in format on standard relay sockets, fixed function per catalog suffix (ON-delay or OFF-delay — not field-selectable), typically covers fractions of a second to minutes, value-oriented for simple delays
  • H3RN Ultra-slim Timer: ultra-slim body, mounts to P2R/P2RF sockets with G2R-compatible pin configuration, documented ranges of 0.1 s to 10 min and 0.1 min to 10 h with selectable maxima (1 s, 10 s, 1 min, 10 min, 1 h, 10 h), conforms to EN61812-1 and IEC60664-1
  • All three are solid-state timer relays intended for industrial control applications — selection is driven by mounting format, required function, and time range, not by quality differences
  • H3CR, H3Y, and H3RN are not mechanically interchangeable — confirm socket and mounting type before ordering
  • Supply voltage and output contact ratings are variant-specific across all three series — always verify against the current datasheet for the exact catalog number
  • LeadTime.ca ships Omron timer relays worldwide — contact for current pricing, availability, and catalog number verification