Omron D4E-1B20N Limit Switch
Omron D4E-1B20N is a compact limit switch with an 11 mm × 4.7 mm stainless sintered alloy roller plunger for reliable mechanical 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 control loads. IP67 protection and operation from -10 to 80°C support demanding industrial environments and repeated machine cycles. Long mechanical and electrical durability suit travel and end-position sensing in automated equipment. The D4E-1B20N belongs to the D4E-N Series within the compact roller plunger limit switch range from Omron machine automation products for dependable position sensing.
| Brand | Omron |
| Product | Limit Switch |
| Model Number | D4E-1B20N |
Omron D4E-1B20N 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. |
| Insulation Resistance | 100 MΩ min. (at 500 VDC) |
The Omron D4E-1B20N Limit Switch uses an 11 mm × 4.7 mm stainless sintered alloy roller plunger for mechanical position detection in industrial equipment. 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 control loads at 50/60 Hz. The switch supports inrush current up to 10 A on both the NC and NO sides. IP67 protection helps the enclosed mechanism withstand dust, water, and common factory contaminants while the roller plunger provides repeatable actuation.
The D4E-1B20N provides at least 10 million mechanical operations and 500,000 electrical operations at 5 A, 250 VAC. Initial contact resistance is 15 mΩ maximum, while insulation resistance is 100 MΩ minimum at 500 VDC. The switch operates from -10 to 80°C 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 in automated machinery where compact construction, sealed protection, and SPDT switching are important. The roller-plunger geometry is especially useful where targets sweep across the sensing point during machine travel. For a closely related D4E-N roller-plunger configuration, see the D4E-1D20N model.
