Omron D4A-3116N Limit Switch
Omron D4A-3116N is a general-purpose limit switch with a 6.5 mm stainless steel coil-spring actuator for flexible machine position detection. The spring actuator can respond to contact from different directions and tolerate target-path variation better than a rigid plunger. Its snap-action mechanism and SPST-NO/SPST-NC contact arrangement provide separate switching paths for general loads, with high inrush capability. IP67 protection and multiple NEMA enclosure ratings support protected machine installations, while operation from -20 to 100°C covers a broad temperature range. The D4A-3116N belongs to the D4A Series within the coil-spring limit switch range from Omron industrial control products for flexible contact, travel, and position sensing.
| Brand | Omron |
| Product | Limit Switch |
| Model Number | D4A-3116N |
Omron D4A-3116N Limit Switch – Technical Specifications
| Specification | Value |
|---|---|
| Shape Structure | General-purpose Limit switches |
| Ctuator | Coil spring 6.5 dia. Stainless steel coil spring |
| Contact Form | SPST-NO/SPST-NC |
| Load | General load |
| Inrush Current | NC: 30 A max. NO: 20 A max. |
| Ambient Temperature | Operating: -20 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 ) |
| Operating Mechanism | Snap action |
The Omron D4A-3116N Limit Switch uses a 6.5 mm stainless steel coil-spring actuator for flexible machine position and contact detection. The coil spring can deflect when contacted from different directions, helping accommodate target-path variation without requiring a rigid axial approach. Its snap-action mechanism provides a defined switching response, while the SPST-NO/SPST-NC contact arrangement supplies separate normally open and normally closed paths for general loads. Inrush current capability reaches 30 A maximum on the NC side and 20 A maximum on the NO side. IP67 protection and multiple NEMA enclosure ratings support protected 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-3116N operates from -20 to 100°C with 35 to 95% relative humidity. Destructive shock resistance reaches 1,000 m/s² maximum. The coil-spring actuator is the main model distinction, giving a flexible contact point that can accept deflection from multiple directions while retaining the same snap-action switching concept used across this D4A group. These characteristics suit presence, travel, and position feedback where actuator flexibility is more useful than rigid plunger contact. For a related D4A model using a cat-whisker actuator for flexible directional contact, see the D4A-3115N model.
