Omron H3CR-A Solid-state Timer — Specs, Variants & Buyer Guide

By Abdullah Zahid
15 min read
Omron H3CR-A solid-state multifunction timer 48x48mm 11-pin relay output for industrial panel control

Omron H3CR-A Solid-state Multi-functional Timer: Complete Specs, Variants, and Buyer's Guide

If you are specifying or replacing a panel-mount timing relay for a motor control circuit, conveyor sequence, or process delay application, the Omron H3CR-A is likely already on your shortlist. This 48 × 48 mm solid-state multifunction timer uses an 11-pin plug-in base, delivers DPDT relay output contacts, and covers operating modes from ON-delay through flicker, interval, and signal ON/OFF-delay — all set from front-panel analog selectors that any experienced electrician can configure without opening a manual. Whether you are standardizing a new panel build or doing a direct like-for-like replacement, getting the supply voltage code and pin configuration right before you order is the single most important step.

If you have already confirmed the Omron H3CR-A is the correct part for your application, check current pricing and availability at LeadTime.ca — we ship worldwide.

Who Should Buy the Omron H3CR-A — and Who Shouldn't

The Omron H3CR-A is the right choice for maintenance teams, OEM panel builders, and controls technicians who need a reliable, field-adjustable multifunction timer with relay outputs in a standard 1/16 DIN form factor. This timer fits your project if all of the following apply:

  • Your control panel supplies a voltage that matches one of the H3CR-A's available supply range variants (confirm the voltage code in the part number before ordering).
  • You require an 11-pin DPDT relay output configuration and have a compatible socket such as the P3G-11 already installed or specified.
  • Your application needs one or more of the available operating modes: ON-delay, interval, flicker, signal ON/OFF-delay, or one-shot.
  • Your timing requirement falls within the H3CR-A's covered range, from fractions of a second up to hundreds of hours, depending on the range selector position.
  • You are switching control loads through contactors or interposing relays, not connecting motors or high-inrush loads directly to the timer contacts.

If your application requires transistor (NPN/PNP) output for direct PLC input interfacing, consider the H3CR-AS or H3CR-A8S instead. If panel space or an existing 8-pin socket makes a SPDT configuration more practical, the H3CR-A8, H3CR-AP, or H3CR-A8E are the correct alternatives to evaluate.

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What the Omron H3CR-A Actually Does in a Control Panel

The Omron H3CR-A is a solid-state multifunction analog timer housed in a 48 × 48 mm (1/16 DIN) front-panel form factor. It plugs into an 11-pin base socket — typically the P3G-11 — and provides DPDT time-limit relay contacts for switching control loads in standard industrial circuits. Unlike single-function timers that do only ON-delay or only off-delay, the H3CR-A supports multiple operating modes selectable from the front panel: ON-delay (mode A), interval, flicker, signal ON/OFF-delay, one-shot, and others depending on the specific variant. Time ranges extend from approximately 0.05 seconds at the short end up to 300 hours at the long end, giving a single stocked unit the flexibility to handle motor sequencing delays measured in seconds and purge cycles or run-on timers measured in minutes or hours.

The practical case for a hardwired multifunction timer like the H3CR-A against a PLC-based timer comes down to cost, simplicity, and retrofit context. In a panel that already uses relay logic and has an 11-pin socket base in place, dropping in an H3CR-A is straightforward and does not require programming, a laptop, or software licensing. For OEM builders who ship machines with identical timing functions repeated across many units, a consistent analog timer keeps maintenance technicians working with something familiar at every customer site, regardless of whether a PLC is present in the panel.

Typical System Architecture for the H3CR-A

The H3CR-A sits in the control circuit layer of a panel, between the control power supply and the load-switching device. It acts as the time-delay decision-maker that triggers downstream contactors, relays, or solenoids at the correct moment in a sequence.

  • Control power supply (24 VDC, 120 VAC, or 240 VAC depending on panel standard) feeds the H3CR-A supply terminals via the 11-pin P3G-11 socket.
  • A control input signal — typically a push button, level switch, flow switch, or auxiliary contact — triggers the timer's start or reset input.
  • The H3CR-A processes the timing function internally using solid-state circuitry and activates its DPDT relay output contacts at the programmed delay.
  • The relay contacts switch a motor starter contactor coil, solenoid valve, pilot lamp circuit, or interposing relay rather than the final load directly.
  • Downstream devices — motors, pumps, conveyors, valves — operate under the protection of the contactor or motor starter that the timer controls.

Where the H3CR-A Fits: Industries and Use Cases

Motor start sequencing is one of the most common deployments. Staggered conveyor starts use ON-delay timers to bring each motor online in sequence rather than simultaneously, avoiding simultaneous inrush across multiple drives. The H3CR-A's relay output triggers the next contactor in the chain after the programmed delay, making it a natural fit for multi-motor material handling lines in manufacturing and distribution environments.

Pump run-on and purge cycle timing is another high-frequency application. After a level or flow signal drops, an off-delay or interval function keeps the pump running for a defined period to clear a line or prevent water hammer. In food and beverage and water and wastewater applications, this function is often a process requirement rather than a convenience feature.

Cyclic timing using the flicker operating mode suits periodic lubrication systems, alarm horn pulsing, and agitation control in process tanks. Rather than adding a PLC output or a dedicated cyclic relay, the H3CR-A's built-in flicker mode handles the function directly from the same unit used for other timing tasks in the panel.

OEM machine builders working on HVAC damper sequencing, heater element staging, and lighting control in commercial and industrial buildings use the H3CR-A because its analog front panel is immediately understandable to building services electricians who may not be automation specialists. Signal ON/OFF-delay and one-shot modes also provide switch debounce and timed pulse functions without requiring PLC involvement.

Application Typical Deployment
Conveyor motor start sequencing ON-delay timer triggers each contactor in sequence to stagger inrush across multiple motors
Pump run-on after level signal drop Interval or off-delay mode keeps pump running for a set period after the control input de-energizes
Periodic lubrication or agitation Flicker mode generates cyclic on/off output to a solenoid valve or motor without external logic
Star-delta motor starting ON-delay times the transition from star to delta configuration via contactors in simple motor starters
HVAC damper or heater sequencing ON-delay or signal delay stages equipment startup in building services panels without PLC programming
Switch debounce and timed pulse generation One-shot mode converts a momentary mechanical input into a clean timed output pulse for downstream logic

Key Specifications and How the H3CR-A Variants Compare

Parameter H3CR-A Value
Form factor 48 × 48 mm (1/16 DIN) front panel
Socket / base type 11-pin plug-in (e.g., P3G-11)
Mounting options DIN rail, surface, or panel flush with appropriate socket and accessories
Output type DPDT relay (time-limit contacts)
Operating modes A, B, B2, C, D, E, G, J (ON-delay, interval, flicker, signal ON/OFF-delay, one-shot, and others)
Time range Approximately 0.05 s to 300 h (range selector and analog knob set the actual delay)
Supply voltage variants Wide AC/DC ranges available — high-voltage (e.g., AC 100–240 V) and low-voltage (e.g., AC/DC 24–48 V) versions
Approvals and certifications UL, CSA, CE (EN61812-1), CCC, and marine approvals where listed
Operating temperature Approximately –10 to +55 °C (verify exact limits from current Omron datasheet)
Timer type Solid-state multifunction analog timer

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

H3CR-A vs Key Variants: Which One Do You Actually Need?

Model Output Type Pin Count / Contacts Primary Advantage Typical Use Case
H3CR-A Relay (DPDT) 11-pin Two independent relay outputs, wide load range, familiar analog control Motor sequencing, process delays, general relay-based control panels
H3CR-A8 Relay (SPDT) 8-pin Compact footprint, simpler wiring for single-contact applications Panels where space or existing 8-pin sockets dictate a SPDT configuration
H3CR-AS Transistor (NPN/PNP) 11-pin PLC-compatible solid-state output, faster switching, no contact wear PLC input interfacing, high-cycle-rate applications, low-power switching
H3CR-A8S Transistor (NPN/PNP) 8-pin Transistor output in compact 8-pin format PLC interfacing where 8-pin socket is already installed
H3CR-AP Relay (SPDT) 8-pin Panel-flush mounting flexibility in 8-pin format Retrofit installations constrained to existing 8-pin panel cutouts

If your existing panel has an 8-pin socket or your application interfaces with a PLC digital input, the H3CR-A is not the correct variant — confirm your pin count and output type requirement before ordering, or check the full variant range at LeadTime.ca.

Expert Verdict: Is the Omron H3CR-A Right for Your Application?

The Omron H3CR-A occupies exactly the right position for maintenance teams and OEM panel builders who need a dependable, field-adjustable multifunction timer with relay outputs and a form factor that has been consistent across many years of industrial panel design. Its solid-state internals combined with an analog front panel means it delivers the reliability and timing range flexibility of modern solid-state design without forcing technicians to navigate digital menu structures. For applications involving motor start sequencing, pump run-on, star-delta timing, flicker control, and similar relay-based functions, the H3CR-A's combination of multiple operating modes, time ranges spanning from 0.05 seconds to 300 hours, and DPDT relay contacts makes it a genuinely versatile single-stocked component that covers a wide range of panel timing needs.

Where the H3CR-A falls short is in applications demanding tight, repeatable timing to fractions of a second with documented precision, or where integrated diagnostics, remote configuration, or network connectivity are required. For those needs, a digital timer or PLC-based timing function is the appropriate solution. Within the H3CR family itself, if your load-side device is a PLC digital input rather than a relay coil or contactor, the H3CR-AS with transistor output avoids the mechanical contact wear issue entirely. And if your existing panel infrastructure uses 8-pin sockets throughout, the H3CR-A8 or H3CR-AP eliminates the need to change bases on a retrofit.

From a procurement standpoint, the H3CR-A's long market history means it is widely stocked by North American distributors, and common voltage variants are typically available for short-lead delivery. That said, less common supply voltage codes can require factory ordering and several weeks of lead time, which is exactly the kind of detail that catches buyers off-guard when a machine is down. Working with a specialist distributor who can validate your exact model code against your panel drawings, confirm current stock, and cross older part numbers to current equivalents is the difference between a same-week repair and a multi-week wait. Check current availability and pricing for the Omron H3CR-A at LeadTime.ca — we ship worldwide.

For volume pricing or to confirm lead time before committing to a build, contact the LeadTime.ca team directly — we ship worldwide.

What Engineers Need to Know Before Ordering the Omron H3CR-A

Community-specific feedback on the Omron H3CR-A is sparse across the major automation forums — the H3CR family tends to be treated as a familiar, workaday timer line that generates relatively little discussion precisely because it rarely causes dramatic problems. What does surface consistently in H3CR-family threads is not hardware failure but selection and configuration error: the wrong variant ordered, the wrong base installed, or the wrong mode selected during commissioning. These are preventable mistakes, and the patterns are consistent enough that any controls specialist supporting a facility running H3CR timers should be familiar with them.

The most frequently reported ordering mistake in H3CR-family discussions is the 11-pin versus 8-pin base mismatch. The H3CR-A uses an 11-pin socket such as the P3G-11, while the H3CR-A8 and H3CR-AP use 8-pin bases. When a technician replaces a timer by model family rather than full model number, the physical base already installed in the panel may not match the new unit. This results in a timer that cannot be seated correctly, requiring a base change and potentially a wiring revision — avoidable entirely by reading the full model code off the existing unit before ordering. The second most consistent pattern is supply voltage mismatch: ordering the high-voltage AC variant when the panel runs on 24 VDC, or vice versa, because the full model code was not checked against the panel supply. The third is assuming that all H3CR variants carry all operating modes — they do not, and a replacement that does not support the required mode (for example, flicker or interval) will appear to function but will behave differently from the original unit in the application.

When community data is limited, the right resource is a specialist distributor who handles these timers regularly and can validate your full model code, confirm the socket type, and check that the required operating mode is present in the specific variant you are ordering. LeadTime.ca carries the H3CR series and can assist with model code cross-referencing before an order is placed, reducing the risk of rework or downtime caused by a misspecified part.

Wiring and Installation Overview

  • Mount the 11-pin socket (such as the P3G-11) on a DIN rail or panel surface before inserting the timer; verify terminal labeling on the socket matches your wiring plan for supply, control input, and relay output circuits.
  • Wire the control panel supply voltage to the designated supply terminals on the socket, ensuring the voltage matches the H3CR-A variant's rated supply range — mismatch here is the most common cause of a timer that powers up incorrectly or not at all.
  • Connect the timer's relay output contacts to the coil of a contactor, motor starter, or interposing relay rather than directly to a motor or high-inrush load; the relay contact rating must not be exceeded.
  • Install external overcurrent and short-circuit protection upstream of the timer in accordance with applicable electrical codes; the H3CR-A does not include internal fusing or a circuit breaker.
  • Route control wiring away from high-current power cables and variable frequency drive output conductors to avoid induced noise on the control input and supply circuits.

Compatible Sockets and Accessories

The Omron H3CR-A requires an external plug-in socket for mounting and wiring. The following accessories are directly relevant to a complete installation:

  • P3G-11 — 11-pin DIN rail or surface-mount socket; the standard base for the H3CR-A, providing screw terminals for supply, control input, and relay output wiring.
  • Flush panel mounting accessories — Omron offers mounting hardware to achieve a panel-flush installation of the H3CR-A in a standard 48 × 48 mm cutout; confirm accessory part numbers with your distributor for the specific mounting arrangement required.
  • Hold-down clips and covers — available for the P3G-11 socket to prevent vibration-induced loosening and to protect terminal wiring in high-vibration environments.

Wrong-Part Prevention Checklist Before You Order

Apply the following checks against your existing panel documentation and load requirements before placing an order for the Omron H3CR-A — a few minutes here prevents days of rework:

  1. Confirm the exact supply voltage range printed in the part number (e.g., AC100–240 vs AC/DC24–48) matches your panel power.
  2. Verify pin configuration (11-pin vs 8-pin) matches the existing socket/base in the panel.
  3. Check that the selected H3CR-A variant provides all required operating modes for your sequence (ON-delay, interval, flicker, signal ON/OFF-delay, one-shot, etc.).
  4. Ensure the relay contact rating is adequate for the load (voltage, current, and AC vs DC) and that heavy loads are switched via contactors, not directly.
  5. Confirm mounting method (DIN rail with socket, surface, or panel flush) and that you are ordering the correct socket and accessories (e.g., P3G-11 base).
  6. Check time range selection (e.g., needing up to many hours) and verify the timer's maximum range covers worst-case process conditions.

If any item on this checklist cannot be confirmed from your existing documentation, contact the LeadTime.ca team before ordering — we can cross-reference model codes and confirm the correct variant for your application.

Frequently Asked Questions

Can I replace an existing H3CR-A with a current-production unit without changing the socket or rewiring?

In most cases, yes — provided the replacement unit has the same supply voltage code and pin configuration (11-pin) as the original. The H3CR-A uses a plug-in socket such as the P3G-11, so if the socket is already in place and correctly wired, a same-variant replacement drops in without rewiring. Confirm the full model code on the existing unit before ordering to avoid a variant mismatch on supply voltage or operating modes.

How do I select the correct supply voltage variant from the H3CR-A model code?

The supply voltage range is encoded in the full model designation. Omron offers variants covering high-voltage AC ranges (such as AC 100–240 V) and low-voltage AC/DC ranges (such as AC/DC 24–48 V). Identify the control supply voltage in your panel, then confirm the H3CR-A variant's supply range includes that voltage with margin. Never assume a single universal variant covers all voltages — ordering the wrong supply version is the most common H3CR ordering error.

Can the H3CR-A relay contacts switch both AC and DC loads?

The H3CR-A's DPDT relay contacts are rated for industrial control loads at both AC and DC voltages, but the rated current and voltage limits differ between AC and DC switching. DC loads are generally harder on relay contacts due to arc suppression requirements. Always verify the contact ratings from the current Omron datasheet against your specific load voltage, current, and inductive characteristics — and use an intermediate contactor for motor or high-inrush loads.

Why is my H3CR-A powered up but not switching its output contacts?

The most common causes are an incorrectly selected operating mode (the timer is in a mode that requires a specific control input sequence), a control input that has not been triggered or is wired to the wrong terminal, or a reset signal that is being held active and preventing timing from starting. Verify the front-panel mode selector position, confirm the control input terminal wiring against the datasheet pin diagram for your specific socket, and check that no external reset condition is present.

When should I use the H3CR-AS transistor output version instead of the H3CR-A relay version?

Choose the H3CR-AS when the timer output is feeding a PLC digital input module directly, where a solid-state transistor output is preferred over mechanical relay contacts for reasons of contact life, switching speed, or low-current compatibility. Relay outputs are appropriate for switching contactor coils, solenoids, and other relay loads where a transistor output's current and voltage limitations would be a constraint.

What is a realistic lead time for the Omron H3CR-A through a North American distributor?

Common voltage variants of the H3CR-A are frequently stocked by North American distributors and can be available for same-day or next-day shipment. Less common supply voltage codes or variant combinations may require factory ordering, which can extend lead times to several weeks. Confirming current stock status with your distributor before committing a build schedule to a specific delivery date is strongly recommended, particularly for machine downtime situations.

Why Order the Omron H3CR-A Through LeadTime.ca

  • LeadTime.ca ships the Omron H3CR-A and H3CR family variants worldwide — no geographic restriction on ordering.
  • Our team can validate your full model code against panel supply voltage, socket type, and required operating modes before the order is placed, preventing costly mismatch returns.
  • We source hard-to-find variants and can cross older H3CR part numbers to current equivalents when a legacy panel needs a direct replacement.
  • Volume pricing and OEM account support are available for panel builders and MRO procurement teams ordering multiple units.
  • Fast response for urgent replacement situations — contact us directly for time-sensitive availability checks.

At-a-Glance Summary

  • The Omron H3CR-A is a solid-state multifunction analog timer in a 48 × 48 mm (1/16 DIN) form factor with DPDT relay output contacts.
  • It uses an 11-pin plug-in socket (such as the P3G-11) — not interchangeable with 8-pin H3CR-A8 or H3CR-AP bases.
  • Operating modes include ON-delay, interval, flicker, signal ON/OFF-delay, one-shot, and others (modes A, B, B2, C, D, E, G, J depending on variant).
  • Time range spans approximately 0.05 seconds to 300 hours, set by a front-panel range selector and analog knob.
  • Supply voltage variants cover both high-voltage AC (e.g., AC 100–240 V) and low-voltage AC/DC (e.g., AC/DC 24–48 V) options — the supply code must match panel power exactly.
  • Carries UL, CSA, CE (EN61812-1), CCC, and marine approvals where listed — suitable for regulated North American industrial environments.
  • Operating temperature is approximately –10 to +55 °C; verify exact limits from the current Omron datasheet.
  • Transistor output versions (H3CR-AS, H3CR-A8S) and 8-pin SPDT versions (H3CR-A8, H3CR-AP, H3CR-A8E) are available for applications where relay output or 11-pin format is not the correct fit.
  • Common variants are widely stocked in North America; less common voltage codes may require factory ordering with extended lead times.

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