Omron D4A-3115N Limit Switch
Omron D4A-3115N is a general-purpose limit switch with a cat-whisker actuator for flexible mechanical position and presence detection. The actuator responds to contact from different directions, making it useful where target approach varies or precise alignment is difficult. Its snap-action mechanism uses a two-circuit double-break design with SPST-NO/SPST-NC switching for general loads, while a G1/2 conduit entry supports field wiring. IP67 protection and multiple NEMA enclosure ratings support protected installations, with operation from -20 to 100°C. The D4A-3115N belongs to the D4A Series within the flexible actuator limit switch range from Omron industrial control products for contact, travel, and position sensing.
| Brand | Omron |
| Product | Limit Switch |
| Model Number | D4A-3115N |
Omron D4A-3115N Limit Switch – Technical Specifications
| Specification | Value |
|---|---|
| Shape Structure | General-purpose Limit switches |
| Contact Configuration | 2-circuit double break type |
| Contact Form | SPST-NO/SPST-NC |
| Load | General load |
| Inrush Current | NC: 30 A max. NO: 20 A max. |
| Conduit | G1/2 |
| Ambient Temperature | Operating: -20 to 100 ℃ |
| Ambient Humidity | 35 to 95 % (with no icing) |
| Shock Resistance | Destruction: 1,000 m/s2 max. |
| Degree Of Protection | IP67 NEMA Type1, 2, 3, 4, 4X, 5, 6P, 12, 13 |
| Durability | Electrical: 1,000,000 operations min. (10 A at 125 VAC ) |
| Insulation Resistance | Between each terminal of the same polarities: 100 MΩ min. Between live-metallic part and ground: 100 MΩ min. Between each terminal and non-live-metallic part: 100 MΩ min. at 500 VDC |
| Dielectric Strength | Between each terminal of the same polarities: 1,000 VAC 50/60 Hz 1 min Between live-metallic part and ground: 2,200 VAC 50/60 Hz 1 min Between each terminal and non-live-metallic part: 2,200 VAC 50/60 Hz 1 min |
| Actuator | Cat whisker |
| Operating Mechanism | Snap action |
| Contact Resistance | 25 mΩ max. |
| Rated Frequency | 50/60 Hz |
The Omron D4A-3115N Limit Switch uses a cat-whisker actuator for flexible mechanical contact, presence, and position detection. The actuator can be approached from different directions, making it suitable where a fixed plunger or roller would require more exact alignment. Its snap-action mechanism uses a two-circuit double-break arrangement with SPST-NO/SPST-NC switching for general loads. Inrush current capability reaches 30 A maximum on the NC side and 20 A maximum on the NO side. A G1/2 conduit entry supports wiring, while 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. Initial contact resistance is 25 mΩ maximum, and insulation resistance is 100 MΩ minimum at 500 VDC between the specified terminal and metallic sections. The D4A-3115N operates from -20 to 100°C with 35 to 95% relative humidity. Destructive shock resistance reaches 1,000 m/s² maximum. The cat-whisker actuator is the key selection feature because it allows light directional contact without a rigid axial approach. These characteristics suit travel or presence feedback where the target may brush past the sensing element from varying angles. For another D4A flexible-actuator model using a stainless steel coil spring, see the D4A-3116N model.
