If you want predictable switching, DEC brand relays respond quickly and hold up over time.
Ust Tsubaki TSB151 Shock Relay 110/220v-ac
A nice touch with the ARD4UR model is the compact footprint, and you will find that it leaves room for other parts.
A nice touch is seeing uauto1 on the casing, giving a sense of traceability without extra packaging.
A nice touch is the blue label area, which makes quick notes easy to read on the fly.
What stands out about this solid-state relay module is how quietly it works during long sessions.
What stands out about this unit is the DIN-rail housing that clips into place with a satisfying click.
A nice touch with the ARD4UR model is how the casing resists minor scuffs, and you will find that it ages well.
If you are sorting parts, you will find that the TE brand is simple to spot.
You will find that the Hyster label sits neatly on the relay, and the terminals feel sturdy.
You will find that the drum switch gives a solid, tactile feel when you flip it on or off.