Omron D4A-4P01N Limit Switch
Omron D4A-4P01N is a general-purpose rotary-action limit switch with snap-action switching and a DPST-NO/DPST-NC contact arrangement. The rotary operating format suits mechanisms where movement is transferred through a rotating actuator system, while the two-pole contact structure provides multiple normally open and normally closed switching paths. High inrush capability supports general loads, and mechanical durability reaches 30 million operations for repeated position feedback. IP67 protection and multiple NEMA enclosure ratings support protected installations, with operation from -10 to 80°C. The D4A-4P01N belongs to the D4A Series within the two-circuit rotary limit switch range from Omron industrial control products for machine position, travel, and sequence sensing.
| Brand | Omron |
| Product | Limit Switch |
| Model Number | D4A-4P01N |
Omron D4A-4P01N Limit Switch – Technical Specifications
| Specification | Value |
|---|---|
| Shape Structure | General-purpose Limit switches |
| Ctuator | Rotary action |
| Contact Form | DPST-NO/DPST-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: 300 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: 750,000 operations min. (5 A at 125 VAC) Mechanical: 30 million operations min. |
| Vibration Resistance | Malfunction: 10 to 55 Hz, 1.5 mm double amplitude |
| Operating Mechanism | Snap action |
The Omron D4A-4P01N Limit Switch uses rotary action with a snap-action mechanism and a DPST-NO/DPST-NC contact arrangement. The rotary operating format suits mechanisms where position is transferred through rotating movement, while the two-pole contact structure provides multiple normally open and normally closed switching paths from one actuation. 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. The model operates from -10 to 80°C.
Mechanical durability is specified at 30 million operations minimum, while electrical durability reaches 750,000 operations minimum at 5 A, 125 VAC. Relative humidity is specified from 35 to 95%. Destructive shock resistance reaches 1,000 m/s² maximum, while malfunction shock resistance reaches 300 m/s² maximum. Malfunction vibration resistance covers 10 to 55 Hz at 1.5 mm double amplitude. These characteristics suit repeated rotary position and sequence sensing where multiple circuit paths and long mechanical life are required. The DPST arrangement distinguishes this model from rotary D4A versions using SPST-NO/SPST-NC contacts. Its 30-million-operation mechanical rating also supports high-cycle movement. For a related D4A rotary model using SPST-NO/SPST-NC switching, see the D4A-3E01N model.
