Omron VB-3221 Limit Switch
The Omron VB-3221 Limit Switch offers Roller plunger (with a 6.8-dia. roller) 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-3221 |
Omron VB-3221 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 | Roller plunger (with a 6.8-dia. roller) |
| 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-3221 is a compact, high-durability multiple limit switch designed for use in industrial applications requiring multiple contact points in one housing. It includes three roller plungers, each with a 6.8 mm diameter roller for smooth mechanical actuation. The switch is flange-mounted and offers four cable entry directions for flexible wiring in space-constrained installations.
Rated for 10 A at 250 VAC (resistive load), the VB-3221 achieves up to 5 million mechanical operations and 300,000 electrical operations. It supports operating speeds from 0.1 mm/s to 0.5 m/s and maintains performance under vibration (10–55 Hz) and shock (up to 1,000 m/s²). The switch housing meets IP67 protection standards, resisting dust, oil, and water. Operating in temperatures from –10°C to 80°C and humidity up to 95%, the VB-3221 is ideal for conveyors, transfer stations, and multi-position detection tasks in harsh industrial environments.
