Omron D4C-1720 Limit Switch
Omron D4C-1720 is a general-purpose limit switch with an R38 roller lever using a 17.5 mm × 7 mm sintered stainless steel roller for machine position and travel detection. The lever actuator suits cams and moving parts that sweep across the roller, while the SPDT contact form provides changeover switching for general loads. Electrical ratings of 5 A at 250 VAC and 4 A at 30 VDC support common control circuits, with IP67 protection for the enclosed switch body. The D4C-1720 belongs to the D4C Series within the R38 roller lever limit switch range from Omron control products for machine travel, position, and end-point sensing.
| Brand | Omron |
| Product | Limit Switch |
| Model Number | D4C-1720 |
Omron D4C-1720 Limit Switch – Technical Specifications
| Specification | Value |
|---|---|
| Shape Structure | General-purpose Limit switches |
| Ctuator | Roller lever 17.5 dia. x 7 Sintered stainless steel roller R38 |
| Contact Form | SPDT |
| Electrical Ratings | 5 A at 250 VAC/ 4 A at 30 VDC |
| Frequency | 50/60 Hz |
| Load | General load |
| Inrush Current | NC: 20 A max. NO: 10 A max. |
| Ambient Temperature | Operating: -10 to 70 ℃ (with no icing) |
| Ambient Humidity | 35 to 95% RH |
| Pollution Degree | 3 (EN60947-5-1) |
| Shock Resistance | Destruction: 1,000 m/s 2 max. Malfunction: 500 m/s 2 max. |
| Classification Of Protection Against Electric Shock | Class I (with earth wire) |
| Degree Of Protection | IP67 |
The Omron D4C-1720 Limit Switch uses an R38 roller lever with a 17.5 mm × 7 mm sintered stainless steel roller for mechanical position and travel detection. The lever actuator provides rolling contact with cams and moving parts that sweep across the sensing point, allowing a wider approach path than a direct plunger. Its SPDT contact form provides changeover switching for general loads, with ratings of 5 A at 250 VAC and 4 A at 30 VDC. Inrush current capability reaches 20 A maximum on the NC side and 10 A maximum on the NO side. IP67 protection covers the enclosed switch body.
The D4C-1720 operates from -10 to 70°C with 35 to 95% relative humidity and is listed for pollution degree 3 under EN60947-5-1. It is a Class I device with an earth wire. Destructive shock resistance reaches 1,000 m/s² maximum, while malfunction shock resistance reaches 500 m/s² maximum. These characteristics suit roller-lever sensing where the target sweeps across the actuator instead of pushing directly into a plunger. The R38 lever radius and stainless steel roller are the primary mechanical selection points. For a related D4C model using a similar R38 roller lever with a 5 A at 125 VAC rating, see the D4C-2220 model.
