Omron WLD28-LD-N Limit Switch
The Omron WLD28-LD-N Limit Switch offers Sealed top-roller plunger actuator, Screw terminals
(Conduit size: G½) shape, LED (With operation indicator). Manufactured by Omron under the Omron Limit Switch category, this model belongs to the WL Series.
| Brand | Omron |
| Product | Limit Switch |
| Model Number | WLD28-LD-N |
Omron WLD28-LD-N Limit Switch – Technical Specifications
| Specification | Value |
|---|---|
| Terminal Shape | Screw terminals (Conduit size: G½) |
| Pretravel Pt | 1.7 mm max. |
| Minimum Applicable Load | 5 VDC 1 mA, resistive load, P level |
| Rated Voltage | 10 to 115 VAC/DC |
| Leakage Current Reference Value | Approx. 0.4 mA at 10 VAC/DC Approx. 0.5 mA at 115 VAC/DC |
| Indicator | LED (With operation indicator) |
| Ambient Temperature | -10 to +80°C (with no icing) |
| Ambient Humidity | 35 to 95%RH |
| Shock Resistance | Destruction: 1,000 m/s2 min. Malfunction: 300 m/s2 min. |
| Degree Of Protection | IP67 |
| Insulation Resistance | 100 MΩ min. (at 500 VDC) |
| Actuator | Sealed top-roller plunger |
| Vibration Resistance | Malfunction: 10 to 55 Hz, 1.5-mm double amplitude |
| Contact Resistance | 25 mΩ max. (initial value for the built-in switch) |
| Rated Frequency | 50/60 Hz |
The Omron WLD28-LD-N is a precision two-circuit limit switch with a sealed top-roller plunger actuator and LED operation indicator for status visibility. It supports a minimum applicable load of 5 VDC, 1 mA (resistive), making it ideal for microload signal detection in low-voltage circuits. Designed with screw terminals and a G½ conduit entry, it offers secure wiring for industrial panels and enclosures.
This switch operates reliably at frequencies of 50/60 Hz and supports a maximum pretravel of 1.7 mm. Leakage current is low—approx. 0.4 mA at 10 VAC/DC and 0.5 mA at 115 VAC/DC—ensuring efficient, safe operation in low-power applications. Built for harsh conditions, the WLD28-LD-N withstands vibration, shock (up to 1,000 m/s²), and temperatures from –10°C to 80°C. With insulation resistance ≥100 MΩ and contact resistance ≤25 mΩ, it’s ideal for compact machinery, sensing arms, and automated systems requiring IP67 protection.
