Omron D4N-1A20 Limit Switch
Omron D4N-1A20 is a slow-action limit switch with a roller lever made from a resin lever and resin roller. It uses 1NC/1NO contacts and a 1-conduit configuration. Operating speed ranges from 1 to 500 mm/s, while operation frequency is 30 operations/minute maximum. IP67 protection and a 300 V rated insulation voltage are specified. The D4N-1A20 Slow-Action Roller Lever belongs to the D4N Series within the Omron 1NC/1NO Limit Switch Range from Omron Industrial Switch Components. Its resin lever, resin roller, contact form, slow-action mechanism, and single-conduit format provide the main model identity.
| Brand | Omron |
| Product | Limit Switch |
| Model Number | D4N-1A20 |
Omron D4N-1A20 Limit Switch – Technical Specifications
| Specification | Value |
|---|---|
| Contact Form | 1NC/1NO |
| Shock Resistance | Destruction 1,000 m/s2 min. Malfunction 300 m/s2 min. |
| Degree Of Protection | IP67 |
| Insulation Resistance | 100 MΩ min. |
| Actuator | Roller lever (resin lever, resin roller) |
| Vibration Resistance | Malfunction 10 to 55 Hz, 0.75 mm single amplitude |
| Operating Mechanism | Slow-action |
| Conduit Size Conduit Openings | 1-conduit |
| Operating Speed | 1 to 500 mm/s |
| Operating Frequency | 30 operations/minute max. |
| Contact Resistance | 25 mΩ max. |
| Rated Insulation Voltage Ui | 300 V |
| Rated Frequency | 50/60 Hz |
| Ambient Operating Temperature | −30 to 70°C (with no icing) |
| Ambient Operating Humidity | 95% max |
| Weight | Approx. 82 g (D4N-1120); Approx. 99 g (D4N-6120) |
The Omron D4N-1A20 Limit Switch uses a roller lever made from a resin lever and resin roller with 1NC/1NO contacts and a slow-action mechanism. The connection is specified as 1-conduit. Operating speed ranges from 1 to 500 mm/s, while operation frequency is 30 operations/minute maximum. Contact resistance is 25 mΩ maximum, insulation resistance is 100 MΩ minimum, and rated insulation voltage is 300 V at 50/60 Hz. IP67 protection is listed, together with an operating temperature range from -30 to 70°C with no icing and humidity up to 95%.
Malfunction vibration resistance covers 10 to 55 Hz at 0.75 mm single amplitude. Destructive shock resistance is 1,000 m/s² minimum and malfunction shock resistance is 300 m/s² minimum. The model is best identified by its resin roller lever, 1NC/1NO contact form, slow-action mechanism, and single-conduit connection. The common D4N electrical values provide supporting context but do not replace these model-specific attributes. The source does not list a separate current or voltage load rating, so none is added. The actuator wording is kept exactly as resin lever and resin roller without assigning an unlisted movement function. For a related D4N roller-lever model with the same 1NC/1NO contact form but snap-action operation, see D4N-1122.
