Omron D4A-3110N Limit Switch
Omron D4A-3110N is a general-purpose limit switch with a top roller plunger using an 11 mm × 5 mm stainless steel roller for machine position detection. The roller actuator suits moving parts that pass across the sensing point, while the snap-action mechanism provides a defined switching response. Its SPST-NO/SPST-NC contact arrangement provides separate control paths, with high inrush capability for general loads. IP67 protection and multiple NEMA enclosure ratings support protected machine installations, while operation from -40 to 100°C covers a wide temperature range. The D4A-3110N belongs to the D4A Series within the roller plunger limit switch range from Omron industrial control products for travel and end-position sensing.
| Brand | Omron |
| Product | Limit Switch |
| Model Number | D4A-3110N |
Omron D4A-3110N Limit Switch – Technical Specifications
| Specification | Value |
|---|---|
| Shape Structure | General-purpose Limit switches |
| Ctuator | Top plunger 11 dia. x 5 Stainless steel roller Roller |
| Contact Form | SPST-NO/SPST-NC |
| Load | General load |
| Inrush Current | NC: 30 A max. NO: 20 A max. |
| Ambient Temperature | Operating: -40 to 100 ℃ |
| Ambient Humidity | 35 to 95% RH |
| Shock Resistance | Destruction: 1,000 m/s 2 max. |
| Degree Of Protection | IP67 NEMA Type1, 2, 3, 4, 4X, 5, 6P, 12, 13 |
| Contact Resistance Initial Value | 25 mΩ max. |
| Durability | Electrical: 1,000,000 operations min. (10 A at 125 VAC ) |
| Vibration Resistance | Malfunction: 10 to 55 Hz, 1.5 mm double amplitude |
| Operating Mechanism | Snap action |
The Omron D4A-3110N Limit Switch uses a top roller plunger with an 11 mm × 5 mm stainless steel roller for mechanical position detection. The roller contact suits moving parts that pass across the actuator, while the snap-action mechanism produces a defined switching response once the operating point is reached. Its SPST-NO/SPST-NC contact arrangement provides separate normally open and normally closed switching paths for general loads. Inrush current capability is specified at 30 A maximum on the NC side and 20 A maximum on the NO side. IP67 protection and multiple NEMA enclosure ratings support protected machine installations.
Electrical durability is specified at 1 million operations minimum at 10 A, 125 VAC, while initial contact resistance is 25 mΩ maximum. The D4A-3110N operates from -40 to 100°C with 35 to 95% relative humidity. Destructive shock resistance reaches 1,000 m/s² maximum, and malfunction vibration resistance covers 10 to 55 Hz at 1.5 mm double amplitude. These characteristics suit repeated top-roller position and end-of-travel sensing where rolling contact, snap-action switching, and separate NO/NC paths are required. The stainless steel roller is especially relevant when the target moves across the actuator rather than pressing directly into a plain plunger. For a related D4A model using the same top roller style with DPST switching, see the D4A-4510N model.
