Omron D4E-1A20N Limit Switch
Omron D4E-1A20N is a compact limit switch with an 11 mm × 4.7 mm stainless sintered alloy roller plunger and snap-action mechanism for reliable machine position detection. The roller actuator suits cams, slides, conveyors, and moving workpieces that pass across the sensing point, while the SPDT contact form provides changeover switching for general loads. IP67 protection and operation from -10 to 80°C support demanding factory environments and repeated machine cycles. The D4E-1A20N belongs to the D4E-N Series within the compact roller plunger limit switch range from Omron machine automation products for dependable travel, machine position, and end-of-stroke sensing.
| Brand | Omron |
| Product | Limit Switch |
| Model Number | D4E-1A20N |
Omron D4E-1A20N Limit Switch – Technical Specifications
| Specification | Value |
|---|---|
| Ctuator | Roller plunger 11 dia. x 4.7 Stainless sintered alloy rollers |
| Contact Form | SPDT |
| Frequency | 50/60 Hz |
| Load | General load |
| Inrush Current | NC: 10 A max. NO: 10 A max. |
| Ambient Temperature | Operating: -10 to 80 ℃ |
| Ambient Humidity | 35 to 95% RH |
| Shock Resistance | Destruction: 1000 m/s 2 Malfunction: 300 m/s 2 |
| Degree Of Protection | IP67 |
| Contact Resistance Initial Value | 15 mΩ max. |
| Durability | Electrical: 500,000 operations min. (5 A at 250 VAC) Mechanical: 10 million operations min. |
| Operating Mechanism | Snap action |
The Omron D4E-1A20N Limit Switch uses an 11 mm × 4.7 mm stainless sintered alloy roller plunger with snap-action switching for mechanical position detection. The rolling actuator suits cams, slides, conveyors, and moving workpieces that pass across the sensing point, helping reduce direct sliding contact during repeated operation. Its SPDT contact form provides changeover switching for general loads at 50/60 Hz. Inrush current capability reaches 10 A maximum on both the NC and NO sides. IP67 protection supports demanding factory environments, while the -10 to 80°C operating range suits a broad range of machine conditions.
The D4E-1A20N provides at least 10 million mechanical operations and 500,000 electrical operations at 5 A, 250 VAC. Initial contact resistance is 15 mΩ maximum. The switch operates with 35 to 95% relative humidity and withstands destructive shock of 1,000 m/s² and malfunction shock of 300 m/s². These characteristics support repeated roller-plunger position and end-of-travel sensing where snap-action response, SPDT switching, and sealed construction are important. The stainless alloy roller is especially useful when targets sweep across the actuator during machine movement rather than pressing directly into a fixed plunger. For a related D4E-N roller-plunger model with closely matched industrial characteristics, see the D4E-1B20N model.
