Omron D4A-3112N Limit Switch
Omron D4A-3112N is a general-purpose limit switch with a stainless steel spring-wire rod actuator for flexible machine position detection. The wire actuator can respond to contact from different directions, making it useful where target alignment varies more than with a rigid plunger. Its snap-action mechanism and SPST-NO/SPST-NC contact arrangement provide defined switching for general loads, with high inrush capability on both contact paths. IP67 protection and multiple NEMA enclosure ratings support protected installations, while operation from -20 to 100°C covers a broad temperature range. The D4A-3112N belongs to the D4A Series within the spring-wire limit switch range from Omron industrial control products for flexible contact and position sensing.
| Brand | Omron |
| Product | Limit Switch |
| Model Number | D4A-3112N |
Omron D4A-3112N Limit Switch – Technical Specifications
| Specification | Value |
|---|---|
| Shape Structure | General-purpose Limit switches |
| Ctuator | Spring wire Stainless steel wire rod |
| 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 |
| Pollution Degree | 3 |
| 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-3112N Limit Switch uses a stainless steel spring-wire rod actuator for flexible machine position and contact detection. The wire rod can receive contact from different directions, making it useful where the target path varies more than a rigid plunger can comfortably accommodate. Its snap-action mechanism provides a defined switching response, while the SPST-NO/SPST-NC contact arrangement gives 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, and initial contact resistance is 25 mΩ maximum. The D4A-3112N operates from -20 to 100°C with 35 to 95% relative humidity and is listed for pollution degree 3. Destructive shock resistance reaches 1,000 m/s² maximum. The spring-wire actuator distinguishes this model from plunger and rotary versions because it allows flexible contact without requiring a single fixed approach direction. These characteristics suit presence, travel, or position feedback where the moving target may brush against the actuator rather than strike a rigid sensing point directly. For another D4A flexible-actuator model using a 7 mm plastic rod, see the D4A-3114N model.
