Omron D4E-1D20N Limit Switch
Omron D4E-1D20N is a compact limit switch with a stainless sintered alloy roller plunger for mechanical position detection. The roller actuator supports smooth contact with cams, slides, conveyors, and moving machine parts, making it useful for repetitive travel and end-position sensing. Its SPDT contact form provides changeover switching for general control loads, while IP67 protection supports environments exposed to dust and moisture. Operation from -10 to 80°C suits a broad range of industrial applications. The D4E-1D20N belongs to the D4E-N Series within the compact roller plunger limit switch range from Omron machine control products for dependable machine position sensing.
| Brand | Omron |
| Product | Limit Switch |
| Model Number | D4E-1D20N |
Omron D4E-1D20N 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-1D20N Limit Switch uses an 11 mm × 4.7 mm stainless sintered alloy roller plunger for accurate mechanical position detection in industrial equipment. The roller actuator provides smooth contact with moving cams, slides, conveyors, and machine parts, making it suitable where the target passes across the detection point rather than pressing directly against a fixed plunger. Its SPDT contact form provides changeover switching for general loads, with 50/60 Hz operation and inrush current capability up to 10 A on both NC and NO contacts. IP67 protection helps the enclosed switch operate around dust, water, and common factory contaminants.
The D4E-1D20N 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. Destructive shock resistance is specified at 1,000 m/s², with malfunction shock resistance of 300 m/s². These characteristics combine long service life, sealed protection, and roller-plunger actuation for repeated machine position and travel detection. The compact actuator also supports reliable contact with moving targets in automated factory equipment. For another D4E-N Series configuration with a closely related roller-plunger design, see the D4E-1D10N model.
