Omron ZE-N21-2 Limit Switch
The Omron ZE-N21-2 Limit Switch offers Sealed crossroller plunger actuator, Sealed (Booted) shape, Side mounting mounting. Manufactured by Omron under the Omron Limit Switch category, this model belongs to the ZE Series.
| Brand | Omron |
| Product | Limit Switch |
| Model Number | ZE-N21-2 |
Omron ZE-N21-2 Limit Switch – Technical Specifications
| Specification | Value |
|---|---|
| Shape Structure | Sealed (Booted) |
| Ambient Temperature | −10°C to +80°C (with no icing) |
| Ambient Humidity | General-purpose type: 35% to 85%RH Sealed type: 35% to 95%RH |
| Shock Resistance | Destruction: 1,000m/s2 max. Malfunction: 100 m/s2 max. 50 m/s2 max |
| Degree Of Protection | IP65 |
| Durability | Mechanical: 10,000,000 operations min. Electrical: 500,000 operations min., for 15 A, 250 VAC resistive load |
| Insulation Resistance | 100 MΩ min. (at 500 VDC) |
| Built In Switch | SPDT (AC) |
| Mounting Direction | Side mounting |
| Dielectric Strength | Between terminals of the same polarity: 1,000 VAC, 50/60 Hz for 1 min Between current-carrying metal part and ground: 2,000 VAC, 50/60 Hz for 1 min Between each terminal and non-current-carrying metal part: 2,000 VAC, 50/60 Hz for 1 min |
| Actuator | Sealed crossroller plunger |
| Vibration Resistance | Malfunction: 10 to 55 Hz, 1.5-mm double amplitude |
| Operating Speed | 0.01 mm/s to 0.5 m/s |
| Operating Frequency | Mechanical: 120 operations/min Electrical: 20 operations/min |
| Contact Resistance | 15 mΩ max. (initial value) |
| Rated Frequency | 50/60 Hz |
| Weight | Approx. 260 to 280 g |
The Omron ZE-N21-2 is a heavy-duty enclosed limit switch featuring a sealed crossroller plunger actuator for precise mechanical detection. It is equipped with SPDT contacts rated for 15 A at 250 VAC (resistive load), making it suitable for general-purpose control in industrial machinery. With a minimum applicable speed of 0.01 mm/s, the switch is designed for both slow and fast actuation, ensuring accuracy across varied applications.
This side-mounted model supports 10 million mechanical operations and 500,000 electrical operations, delivering long-term durability in repetitive-use environments. It resists vibration (10–55 Hz, 1.5 mm amplitude) and shock (up to 1,000 m/s²), while maintaining excellent insulation resistance (100 MΩ at 500 VDC) and contact reliability (15 mΩ max). Operating from −10°C to 80°C with humidity tolerance up to 95%, the ZE-N21-2 is built to perform in demanding factory settings with sealed housing and IP65 protection.
