The Omron D4A1110N is a metallic-body limit switch with a top-mounted roller plunger actuator — SPDT contact, momentary action, rated 10 A at 250 V AC. The roller plunger is stainless steel, 0.43 in diameter, with a fixed arm and 0.2 in arm depth. This is a surface-mount, plug-in body with screw terminals, sealed to IP67 and carrying NEMA enclosure ratings 1, 2, 3, 4X, 5, 6P, 12, and 13 — meaning it stands up to washdown and outdoor exposure without a secondary enclosure.
The DC contact rating spans multiple voltages: 10 A at 14 V and 8 V, 6 A at 30 V, then drops to 0.8 A at 125 V and 0.4 A at 250 V. That steep derate above 30 V is typical for a switch not designed for high-voltage DC interruption — if your circuit runs 125 VDC or higher, verify the load current stays under the listed limit. The AC rating is a straightforward 10 A at 250 V, covering most motor and relay control circuits.
Approvals include UL Listed, CSA, and CCC — accepted across North America and China for safety-listed installations. The boot on the actuator is included, maintaining the IP67 seal. Shock resistant construction is noted, suitable for applications on vibrating machinery or near impact zones.