Omron D4A-3E05N Limit Switch
Omron D4A-3E05N is a general-purpose holding-type rotary limit switch with snap-action switching for machine position control. The holding rotary action is useful where the operating position must be retained after mechanical actuation rather than immediately returning. Its SPST-NO/SPST-NC contact arrangement provides separate switching paths for general loads, with high inrush capability. Mechanical durability reaches 50 million operations, while IP67 protection and multiple NEMA enclosure ratings support protected installations. The model operates from -10 to 80°C for a wide range of machine applications. The D4A-3E05N belongs to the D4A Series within the holding rotary limit switch range from Omron industrial control products for retained position and travel sensing.
| Brand | Omron |
| Product | Limit Switch |
| Model Number | D4A-3E05N |
Omron D4A-3E05N Limit Switch – Technical Specifications
| Specification | Value |
|---|---|
| Shape Structure | General-purpose Limit switches |
| Ctuator | Rotary action Holding type |
| Contact Form | SPST-NO/SPST-NC |
| Load | General load |
| Inrush Current | NC: 30 A max. NO: 20 A max. |
| Ambient Temperature | Operating: -10 to 80 ℃ |
| Ambient Humidity | 35 to 95% RH |
| Shock Resistance | Destruction: 1,000 m/s 2 max. Malfunction: 600 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 ) Mechanical: 50 million operations min. |
| Vibration Resistance | Malfunction: 10 to 55 Hz, 1.5 mm double amplitude |
| Operating Mechanism | Snap action |
The Omron D4A-3E05N Limit Switch uses a holding-type rotary action with snap-action switching for machine position control. The holding designation distinguishes it from standard rotary configurations by retaining the operated state according to the source description. Its SPST-NO/SPST-NC contact form provides separate normally open and normally closed switching 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 machine installations, while initial contact resistance is specified at 25 mΩ maximum.
Mechanical durability reaches 50 million operations minimum, while electrical durability is specified at 1 million operations minimum at 10 A, 125 VAC. The D4A-3E05N operates from -10 to 80°C with 35 to 95% relative humidity. Destructive shock resistance reaches 1,000 m/s² maximum and malfunction shock resistance reaches 600 m/s² maximum. Malfunction vibration resistance covers 10 to 55 Hz at 1.5 mm double amplitude. These characteristics support rotary position control where long mechanical life, general-load switching, and a holding-type action are required together. The holding action is the principal functional distinction shown for this model within the supplied D4A rotary group. For a related D4A model using standard rotary action without the holding designation, see the D4A-3E01N model.
