What the H3DKFACDC24240OMI is on the shelf
The Omron H3DKFACDC24240OMI is an H3DK-series electronic timer in the Twin Timer mode, with one SPDT (1CO) output contact wired through screw terminals — the form factor most panels already accept for DIN-rail timer sockets. It draws its operating supply from a wide 24 to 240 VAC/DC band, so the same unit covers 24 VDC control transformers and 230 VAC auxiliary rails without a stocking split.
Time range and the eight timing scales
Time setting spans 0.1 s to 1200 h across 8 user-selectable ranges, which lets one catalog code replace several fixed-range timers in the storeroom — set the dial to the scale that matches the process (sub-second pulse, minute-scale drain delay, or multi-day interval). Single-function mode (one timing program) keeps the faceplate simple; for the Twin Timer classification, that means the unit runs its on/off or off/on sequence without the multi-mode menu found on higher-tier H3DK variants.
Contact ratings for the panel builder
The 1CO contact is rated 5 A at 250 VAC and 30 VDC, with switching power ceilings of 1.25 kVA AC and 150 W DC — sized to drive small contactors, solenoid valves, and indicator loads directly without an interposing relay. Screw terminations accept ring or fork lugs and tighten down with a standard blade — important in panels where vibration or thermal cycling would work a push-in cage loose.
Where it mounts and what it tolerates
IP30 rated, so the timer drops into a closed control cabinet or a behind-the-panel pocket — not an open machine surface or a washdown zone where water or dust would reach the terminals.
Lifecycle and stocking posture
Listed is mature — the part is still orderable but no longer in the newest-release tier, which is the usual signal to keep a min/max safety stock on hand and treat it as a long-running critical spare rather than chasing redesigns.