Overview
The Omron H3CA-8 is a 1/16 DIN (48×48 mm) digital solid-state timer designed for industrial control applications requiring precise timing and relay switching. This 8-pin octal-mount timer features eight field-selectable operation modes and an LCD bargraph display with remaining time and output status indicators. H3CA-8 units are commonly found in manufacturing, process control, and automation systems where reliable, compact timing logic is essential.
Key Features
- Wide timing range: 0.1 second to 9,990 hour timing ranges
- Eight operation modes: Field-selectable to match different control requirements
- Dual power supply: 24 to 240 VAC or 24 to 240 VDC operation
- LCD display: Real-time countdown and output status indication
- Compact form factor: 1/16 DIN plug-in unit fits standard 8-pin octal sockets
- High reliability: Mechanical: 10,000,000 operations minimum under no load at 1,800 operations/h
Technical Specifications
- Time delay adjustment: 5-digit switches
- Timing range: 0.1 sec to 9,990 hours
- Repeatability: +/- 0.3%, +/- 0.05 seconds
- Reset time: 0.1 s max
- Input voltage: 24 to 240 VAC or 24 to 240 VDC
- Power consumption: AC 3 VA / DC 3 W
- Output: Relay S.P.D.T (single-pole, double-throw)
- Mounting: 8-pin octal round socket
- Dielectric strength: 2,000 VAC, 50/60 Hz for 1 min
- Certifications: UL508, CSA C22.2 No. 14, LR, NK · Conforms to EN61812-1
- Operating temperature: -14 to 60°C
- Humidity: 35 to 85% RH (non-condensing)
- Insulation resistance: 100 MΩ min. at 500 VDC
Typical Applications
- Motor soft-start and run-time monitoring in industrial drives
- Process sequence control and cycle timing in manufacturing
- Delayed relay output switching in control panels
- Dwell and soak time control in heating and curing applications
- Alarm and reset timing functions in monitoring systems
- Pump priming and equipment warm-up delays
Compatibility & Replacements
Compatible With
- Standard 8-pin octal relay sockets (P3GA-11 and equivalent)
- Allen-Bradley, Siemens, Schneider, and other PLC systems using 8-pin timing relays
- Industrial control panels with 24–240 VAC/VDC supply
- Legacy automation systems requiring plug-in timer replacement
Replaces / Drop-In Replacement For
- Omron H3CA-8 direct equivalent units across all voltage ratings
- Legacy 8-pin digital timer relays in equivalent form factor
- Verify exact supply voltage and operation mode with your system documentation before ordering
Works With
- Software/configuration: Manual field-selectable operation modes (no software configuration required)
- Mounting sockets: Standard 8-pin octal relay sockets and terminal cover (Y92A-48G) compatible adapters
- Accessories: Mounting adapters, socket replacements, and DIN rail mounting brackets for the H3CA series
- Input signals: Standard 24–240 V relay logic inputs; compatible with pushbutton, sensor, and proximity switch control
