| PartNumber | MDSR-4-12-38 | MDSR-4-17-28 | MDSR-4-12-18 |
| Description | Magnetic / Reed Switches MDSR-4 12-38 | Magnetic / Reed Switches MDSR-4 17-28 | Magnetic / Reed Switches MDSR-4 12-18 |
| Manufacturer | Littelfuse | Littelfuse | Littelfuse |
| Product Category | Magnetic / Reed Switches | Magnetic / Reed Switches | Magnetic / Reed Switches |
| RoHS | Y | Y | Y |
| Switch Type | Sub-Miniature | Sub-Miniature | Sub-Miniature |
| Contact Form | SPST | SPST | SPST |
| Operate Range | 12 AT to 38 AT | 17 AT to 28 AT | 12 AT to 18 AT |
| Voltage Rating AC | 200 VDC | 200 VDC | 200 VDC |
| Color | Clear | Clear | Clear |
| Termination Style | Axial | Axial | Axial |
| Packaging | Bulk | Bulk | Bulk |
| Contact Position | Normally Open | Normally Open | Normally Open |
| Illumination Color | - | - | - |
| Mounting | Through Hole | Through Hole | Through Hole |
| Series | MDSR-4 | MDSR-4 | MDSR-4 |
| Brand | Hamlin / Littelfuse | Hamlin / Littelfuse | Hamlin / Littelfuse |
| Illuminated | Non-Illuminated | Non-Illuminated | Non-Illuminated |
| Lamp Type | - | - | - |
| Product Type | Reed Switches | Reed Switches | Reed Switches |
| Factory Pack Quantity | 1000 | 1000 | 1000 |
| Subcategory | Switches | Switches | Switches |