Omron D4A-3E01N Limit Switch
Omron D4A-3E01N is a general-purpose rotary-action limit switch with a snap-action mechanism for repeatable machine position and travel detection. The rotary operating format suits mechanisms where movement is transferred through a rotating actuator arrangement instead of direct plunger contact. Its SPST-NO/SPST-NC contact form provides separate switching paths for general loads, with high inrush capability. Mechanical durability reaches 50 million operations, supporting high-cycle position feedback. IP67 protection and multiple NEMA enclosure ratings support protected installations. The D4A-3E01N belongs to the D4A Series within the rotary action limit switch range from Omron industrial control products for machine travel, sequence, and position sensing.
| Brand | Omron |
| Product | Limit Switch |
| Model Number | D4A-3E01N |
Omron D4A-3E01N Limit Switch – Technical Specifications
| Specification | Value |
|---|---|
| Shape Structure | General-purpose Limit switches |
| Ctuator | Rotary action |
| 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-3E01N Limit Switch uses rotary action with a snap-action mechanism for repeated machine position and travel detection. The rotary operating format suits mechanisms where motion is transferred through a rotating actuator arrangement instead of direct plunger contact. Its SPST-NO/SPST-NC contact form provides 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, 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-3E01N 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 high-cycle rotary position sensing where repeated mechanical actuation and general-load switching are required together. Unlike the holding-type version, this source identifies the D4A-3E01N simply as rotary action without a holding designation. For a related D4A rotary model with a holding-type operating format, see the D4A-3E05N model.
