Omron VB-3121 Limit Switch
The Omron VB-3121 Limit Switch offers Bevel plunger actuator, 3 plungers, 0.1 mm to 0.5 m/s speed. Manufactured by Omron under the Omron Limit Switch category, this model belongs to the VB Series.
| Brand | Omron |
| Product | Limit Switch |
| Model Number | VB-3121 |
Omron VB-3121 Limit Switch – Technical Specifications
| Specification | Value |
|---|---|
| Number Of Plungers | 3 plungers |
| Shape Of Box | With flange |
| Conduit | Four |
| Ambient Temperature | –10°C to 80°C (with no icing) |
| Ambient Humidity | 35% to 95% |
| Shock Resistance | Destruction: 1,000 m/s2 min. Malfunction: 200 m/s2 min. |
| Degree Of Protection | IP67 |
| Durability | Mechanical: 5,000,000 operations min. Electrical: 300,000 operations min. (10 A at 250 VAC, resistive load) |
| Insulation Resistance | 100 MΩ min. (at 500 VDC) |
| Actuator | Bevel plunger |
| Vibration Resistance | Malfunction: 10 to 55 Hz, 1.5-mm double amplitude |
| Operating Speed | 0.1 mm to 0.5 m/s |
| Operating Frequency | Mechanical: 120 operations min. Electrical: 30 operations min. |
| Contact Resistance | 15 mΩ max. (initial value) |
| Rated Insulation Voltage Ui | 300 VAC |
| Rated Frequency | 50/60 Hz (AC) |
| Weight | Approx. 580 g |
The Omron VB-3121 is a durable multi-plunger limit switch designed for reliable position detection in demanding machinery. It features a bevel plunger actuator with three plungers and a flange-mount structure, making it suitable for detecting movement from multiple directions in confined spaces. This model supports a 10 A resistive load at 250 VAC and provides both mechanical (5 million operations) and electrical (300,000 operations) longevity for continuous use.
Operating speeds range from 0.1 mm/s to 0.5 m/s, with stable performance under frequent actuation. Built for harsh environments, the VB-3121 is IP67-rated and can operate in temperatures from –10°C to 80°C and humidity levels up to 95%. It also meets shock resistance standards up to 1,000 m/s² and offers excellent insulation (100 MΩ min.) and low contact resistance (15 mΩ max.). This switch is ideal for presses, packaging machines, and complex automation lines.
