Omron D5A-2100 Limit Switch
Omron D5A-2100 is an M5 cylindrical limit switch with a 1.3 mm ceramic pin plunger and SPST-NC contact configuration. It is rated at 10 mA at 24 VAC and 10 mA at 12 VDC, with an operating-speed range from 1 µm/s to 0.5 m/s. IP40 protection, 800 mΩ maximum contact resistance, one million minimum electrical operations, and ten million minimum mechanical operations are specified. The D5A-2100 belongs to the D5A Series within the ceramic pin plunger switch range from Omron limit switch products for low-current mechanical detection.

| Brand | Omron |
| Product | Limit Switch |
| Model Number | D5A-2100 |
Omron D5A-2100 Limit Switch – Technical Specifications
| Specification | Value |
|---|---|
| Shape Structure | Cylinder type (M5) |
| Ctuator | Pin plunger 1.3 dia. Ceramic plunger |
| Contact Form | SPST-NC |
| Electrical Ratings | 10 mA at 24 VAC/ 10 mA at 12 VDC |
| Frequency | 50/60 Hz |
| Ambient Temperature | Operating: -20 to 75 ℃ (with no icing) |
| Ambient Humidity | 35 to 85% RH |
| Shock Resistance | Destruction: 1,000 m/s 2 max. Malfunction: 300 m/s 2 max. |
| Degree Of Protection | IP40 |
| Contact Resistance Initial Value | 800 mΩ max. |
| Durability | Electrical: 1,000,000 operations min. (10 mA at 24 VAC ) Mechanical: 10 million operations min. |
| Permissible Operating Speed | 1 µm/s to 0.5 m/s |
The Omron D5A-2100 Limit Switch uses an M5 cylindrical construction with a 1.3 mm ceramic pin plunger and an SPST-NC contact form. Its source-listed ratings are 10 mA at 24 VAC and 10 mA at 12 VDC at 50/60 Hz. Mechanical input can range from a very low 1 µm/s up to 0.5 m/s. IP40 protection is specified, together with 800 mΩ maximum contact resistance. The switch operates from -20 to 75°C with relative humidity from 35 to 85%, providing the principal operating limits supplied for this model.
Electrical durability reaches one million operations minimum at 10 mA, 24 VAC, while mechanical durability is specified at ten million operations minimum. Destructive shock resistance is 1,000 m/s² maximum and malfunction shock resistance is 300 m/s² maximum. The M5 body and ceramic pin plunger are the primary mechanical identifiers, while the low current rating defines its electrical use. The supplied data for D5A-2100 and D5A-2200 is substantially the same, so no unsupported distinction is added. For the related listed model, see the D5A-2200.


