Omron D4C-3420 Limit Switch
Omron D4C-3420 pairs an R38 roller lever with a 17.5 mm × 7 mm sintered stainless steel roller and a 3 m four-core VCTF cable. The switch is rated at 4 A at 30 VDC and uses an SPDT contact arrangement. IP67 protection, operation from -10 to 70°C, and a 300 mΩ maximum contact resistance are also specified. Compared with plunger-type D4C models, the main difference is the R38 lever actuator and its sweeping mechanical action. The D4C-3420 is part of the D4C Series within the R38 roller lever switch range from Omron limit switch products.
| Brand | Omron |
| Product | Limit Switch |
| Model Number | D4C-3420 |
Omron D4C-3420 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 | 4 A at 30 VDC |
| Load | General 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-3420 Limit Switch combines an R38 lever radius with a 17.5 mm × 7 mm sintered stainless steel roller. This roller-lever configuration gives the model a different actuation geometry from the roller-plunger D4C versions. Its SPDT contact arrangement is rated at 4 A at 30 VDC. A four-core 3 m VCTF cable is supplied, using 0.75 mm² nominal conductor area and a 7.6 mm cable diameter. The source also specifies IP67 protection, operation from -10 to 70°C, and relative humidity from 35 to 95%.
Contact resistance is 300 mΩ maximum, and mechanical durability is listed at 10 million operations minimum. Shock resistance reaches 1,000 m/s² maximum for destruction and 500 m/s² maximum for malfunction. The combination of an R38 roller lever and 3 m cable is the key identifier for the D4C-3420. It is therefore most useful to compare it with another R38 version rather than with a plunger-type switch. The D4C-3520 uses the same basic roller-lever dimensions and 4 A at 30 VDC rating but extends the cable length to 5 m.
