What the relay does in the panel
The H3YN-4-Z DC24 is a programmable multi-function timer in Omron's H3YN series, socketable so the timer body lifts out of the panel base without disturbing field wiring — useful for a failed-unit swap on a running line (cites:,). Four Form C (4PDT) contact set gives eight switching poles in one device, so a single timer can sequence two independent loads or interlock a pair of control circuits without stacking auxiliary relays (cites:).
Coil, timing, and contact ratings that drive sizing
Coil runs directly from 24 VDC with the timing initiate tied to the input voltage, simplifying the wiring on a 24 VDC control bus — no separate trigger signal needed (cites:,). Adjustable from 0.1 sec to 10 min via a hand dial covers the common sequence range from a short pulse-stretch to a multi-stage purge or cooldown timer; the same dial hardware supports multiple timing functions selected through the programming mode (cites:,). Mechanical relay contacts rated 3 A at 250 VAC set the load ceiling per pole — sized for control circuits, solenoid pilots, and indicator stacks rather than direct motor switching, which belongs on a contactor downstream (cites:,).
Production status and sourcing posture
Listed as Active by the manufacturer, so the part remains in normal production — procurement can plan against the standard BOM rather than chasing a last-time-buy window (cites:). Sold in bulk pack and supplied through independent distribution on a quoted-to-order basis; pricing and current availability are confirmed against the RFQ quantity (cites:).