Omron H3CR-A8E 24-48VAC/DC Multi-Function Timer Relay: Technical Guide, Applications and Installation
The Omron H3CR-A8E 24-48VAC/DC is a Multi-Function Timer Relay developed for engineers who understand that the cost of an unplanned stop far exceeds the cost of a quality component. Rated at 24-48V AC/DC, it addresses real challenges in time-delayed motor starting without overcomplicating installation or maintenance.
Many engineers working with this product also specify Omron Omron Sensor solutions on the same project. The shared ecosystem means signal levels, cable standards, and mounting accessories align across product families — a practical advantage that saves time during panel design and commissioning.
Understanding the Omron H3CR-A8E 24-48VAC/DC Multi-Function Timer Relay
The Omron H3CR-A8E 24-48VAC/DC is a Multi-Function Timer Relay rated at 24-48V AC/DC, built to handle time-delayed motor starting reliably over a long service life. Key engineering features include 12 timing functions, din rail mount, wide time range 0.05s-300h, and the unit mounts via din rail (with socket).
Technically, the Omron H3CR-A8E 24-48VAC/DC delivers 12 timing functions, din rail mount, wide time range 0.05s-300h. Matching the 24-48V AC/DC control bus requires no extra hardware, which keeps commissioning time short and the panel design clean.
Core Specifications
The table below summarises the main technical parameters of the Omron H3CR-A8E 24-48VAC/DC. For full specifications, always refer to the official Omron product datasheet, as application-specific derating may apply.
| Parameter | Value |
|---|---|
| Product Type | Multi-Function Timer Relay |
| Coil / Operating Voltage | 24-48V AC/DC |
| Contacts / Channels | 1 SPDT relay output |
| Contact Current | 5 A |
| Key Features | 12 timing functions, DIN rail mount, wide time range 0.05s-300h |
| Mounting | DIN rail (with socket) |
| Mechanical Lifetime | 10 million mechanical operations |
| Operating Temperature | -10°C to +55°C |
| Compatible Accessory | P3GA-11 socket, PYF08A-E |
Application Scenarios
The Omron H3CR-A8E 24-48VAC/DC Multi-Function Timer Relay is commonly specified for the following applications:
- Time-delayed motor starting
- Equipment protection
- Sequential control 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-A8E 24-48VAC/DC is designed with exactly those conditions in mind.
The Omron H3CR-A8E 24-48VAC/DC is designed to be used with P3GA-11 socket, PYF08A-E. Using a non-compatible accessory model can compromise overall service life and performance, so always verify accessory compatibility before ordering.
Getting It Right at Installation
Commissioning the Omron H3CR-A8E 24-48VAC/DC Multi-Function Timer Relay is straightforward. Snap or screw it into position on the DIN rail, connect cables at the correct terminals, and confirm polarity where applicable. During the first powered test, verify that the indicator LED (where fitted) responds correctly and that the output contacts behave as expected under a controlled test load.
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.
Why Engineers Choose Omron
Specifying the Omron H3CR-A8E 24-48VAC/DC Multi-Function Timer Relay also means specifying into an ecosystem. Omron’s portfolio covers relays, sensors, PLCs, power supplies, and more — all engineered to work together. When a component does eventually need replacing, compatibility with the rest of the system is guaranteed, which is something off-brand alternatives simply cannot offer.
Frequently Asked Questions
What applications is the Omron H3CR-A8E 24-48VAC/DC designed for?
The Omron H3CR-A8E 24-48VAC/DC Multi-Function Timer Relay is designed primarily for time-delayed motor starting, equipment protection, sequential control systems. Its construction and contact ratings make it well suited to both continuous-duty and intermittent switching in these environments.
What coil voltage does the Omron H3CR-A8E 24-48VAC/DC use?
The Omron H3CR-A8E 24-48VAC/DC operates at a coil voltage of 24-48V AC/DC. Always verify that your control circuit voltage matches before installation.
Does the Omron H3CR-A8E 24-48VAC/DC require a specific socket?
Yes, Omron designs its relay families to work with specific matched sockets. Using a non-specified socket can affect contact pressure and shorten service life. Refer to the Omron H3CR-A8E 24-48VAC/DC datasheet for the compatible socket model.
What certifications does the Omron H3CR-A8E 24-48VAC/DC carry?
Omron products are manufactured to CE and UL standards, with additional certifications depending on the model. Product-specific certification details are available in the official Omron datasheet and on the product label.
Where can I source the Omron H3CR-A8E 24-48VAC/DC in Europe?
The Omron H3CR-A8E 24-48VAC/DC Multi-Function Timer Relay is available through Omron’s authorised European distributors. Purchasing through official channels ensures product authenticity, full warranty coverage, and access to technical support.