What this H3CR-A timer actually does in the panel
The Omron H3CRA8EAC100240DC100OMI is a multi-function plug-in timer from the H3CR-A family, built around a single 8-pin socket base and listed as a mature product on the manufacturer's catalogue. It packages five timing modes into one device — ON-Delay, Interval, One-Shot, Flicker ON Start, and the fifth function the H3CR-A series is known for — so one timer can replace several dedicated units on a control schematic. Time range runs from 0.05 s up to 300 h on a single dial, which covers anything from a fast conveyor-brake pulse to a multi-day process cycle without swapping the unit. Operating voltage spans 100 V to 240 V on the same coil, so the same part number drops into 110 V and 230 V panel builds without re-specifying the timer.
Contact rating and what it will actually switch
Output is a single changeover (1CO) contact rated 5 A switching current, 250 V AC or 30 V DC, with a switching power ceiling of 1.25 kVA on the AC side and 150 W on DC. That makes it a comfortable fit for small contactor coils, solenoid valves, and indicator lamps on a control panel — well clear of the 5 A ceiling — but not a candidate for directly switching heater loads or motor starters where the inrush sits above the rated contact figure.
Mounting, sealing, and field handling
Termination is via an 8-pin round socket, the standard H3CR-A base pattern, so a swap in the field is a pull-and-replace against the existing receptacle — no re-wiring required. Front-panel protection is rated IP40, which keeps finger contact and tool intrusion out of the dial and the output indicator, but it does not cover washdown or outdoor exposure; this timer belongs inside an enclosure, not on the cabinet door of a wet-process line.
Where the H3CRA8EAC100240DC100OMI fits in a real control circuit
Multi-function timers like this one typically sit between a sensor or pushbutton and the coil of a downstream contactor or solenoid — the dial sets the delay, the mode selector picks ON-Delay for a start-up timer, Interval for a fixed-run pulse, or One-Shot for a debounced single trigger. The 1CO contact can drive the coil directly up to 5 A, or feed an interposing relay if the load sits above the timer's contact rating.