Omron H3CR-A8 AC24-48/DC12-48 Multi-Function Timer Relay: Technical Guide, Applications and Installation

Maintenance teams know the difference between components that merely survive and ones that genuinely perform over the long haul. The Omron H3CR-A8 AC24-48/DC12-48 Multi-Function Timer Relay— 24-48V AC/DC rated — falls firmly in the second category, making it a frequent first choice for delay control environments.

In a well-designed automation system, the sensing layer and the switching layer work in close coordination. Omron’s Omron Sensor range is engineered to feed signals directly into relays and controllers from the same manufacturer, minimising compatibility concerns and simplifying system validation.

Omron H3CR-A8 AC24-48/DC12-48 — Product Profile

The Omron H3CR-A8 AC24-48/DC12-48 is a Multi-Function Timer Relay rated at 24-48V AC/DC, built to handle delay control reliably over a long service life. Key engineering features include 12 timing modes, 0.05s-300h adjustable, compact body, and the unit mounts via din rail (with socket).

On the bench, 12 timing modes, 0.05s-300h adjustable, compact body stands out immediately. The 24-48V AC/DC rating align with control voltage standards used across manufacturing, building automation, and process control industries, reducing the need for additional conversion stages.

Technical Data Summary

The table below summarises the main technical parameters of the Omron H3CR-A8 AC24-48/DC12-48. For full specifications, always refer to the official Omron product datasheet, as application-specific derating may apply.

Where This Product Fits

The Omron H3CR-A8 AC24-48/DC12-48 Multi-Function Timer Relay is commonly specified for the following applications:

• Delay control
• Pump/fan timing
• Periodic operation systems

Across these use cases, the consistent thread is a need for dependable switching over a large number of operations, often in environments where an unplanned fault would create significant disruption. The Omron H3CR-A8 AC24-48/DC12-48 is designed with exactly those conditions in mind.

The Omron H3CR-A8 AC24-48/DC12-48 is designed to be used with P3GA-11 socket. Using a non-compatible accessory model can compromise overall service life and performance, so always verify accessory compatibility before ordering.

Practical Installation Tips

The Omron H3CR-A8 AC24-48/DC12-48 Multi-Function Timer Relay follows standard DIN rail mounting practice. Before inserting the unit into its socket or fixing it to the rail, always verify the circuit is fully de-energised. Check that cable cross-sections are appropriate for the load, and after commissioning, mark the panel clearly with the device type and rated voltage for future maintenance reference.

For ongoing maintenance, periodically inspect for contact discolouration, check terminal screws for loosening, and look for any signs of heat stress on the housing. Catching these early avoids the much larger cost of an unplanned production stop.

Performance You Can Rely On

From a total cost of ownership perspective, the Omron H3CR-A8 AC24-48/DC12-48 Multi-Function Timer Relay makes financial sense even when its purchase price is higher than alternatives. Reduced unplanned downtime, fewer replacement cycles, and lower maintenance labour costs add up to a clear advantage over the operational lifetime of a machine.

Frequently Asked Questions