Omron D4C-4420 Limit Switch
Omron D4C-4420 is a microload limit switch with an R38 roller lever and SPDT contact configuration for machine position and travel detection. The 17.5 mm × 7 mm sintered stainless steel roller provides rolling contact with moving targets. Electrical ratings are 0.1 A at 125 VAC and 0.1 A at 30 VDC, while a 3 m four-core VCTF cable supports prewired installation. IP67 protection covers the enclosed switch body. The D4C-4420 belongs to the D4C Series within the microload roller lever switch range from Omron limit switch products for low-current position sensing.
| Brand | Omron |
| Product | Limit Switch |
| Model Number | D4C-4420 |
Omron D4C-4420 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 | 0.1 A at 125 VAC/ 0.1 A at 30 VDC |
| Load | Micro load |
| Ambient Temperature | Operating: -10 to 70 ℃ (with no icing) |
| Ambient Humidity | 35 to 95% RH |
| Shock Resistance | Destruction: 1,000 m/s 2 max. Malfunction: 500 m/s 2 max. |
| Degree Of Protection | IP67 |
| Contact Resistance Initial Value | 300 mΩ max. |
| Durability | Electrical: 200,000 operations min. (5 A at 125 VAC) Mechanical: 10 million operations min. |
| Cable Specifications | VCTF, 4 cores, 3 m Nominal sectional area: 0.75 mm 2 Diameter: 7.6 dia. |
The Omron D4C-4420 Limit Switch uses an R38 roller lever with a 17.5 mm × 7 mm sintered stainless steel roller for microload position and travel detection. Its SPDT contact form supports 0.1 A at 125 VAC and 0.1 A at 30 VDC. A four-core 3 m VCTF cable is supplied, with a nominal conductor sectional area of 0.75 mm² and a cable diameter of 7.6 mm. IP67 protection covers the enclosed switch body, and operation is specified from -10 to 70°C with 35 to 95% relative humidity.
Mechanical durability is specified at 10 million operations minimum, while the source also lists electrical durability at 200,000 operations minimum at 5 A, 125 VAC. Initial contact resistance is 300 mΩ maximum. Destructive shock resistance reaches 1,000 m/s² maximum and malfunction shock resistance reaches 500 m/s² maximum. The R38 lever suits targets that sweep across the sensing point and provides a wider actuation path than a direct plunger. For a closely related D4C microload R38 roller-lever configuration using the same 3 m cable length, see the D4C-4220 model.
