| PartNumber | MDSM-4B-12-23 | MDSM-4B-12-18 | MDSM-4B-12-28 |
| Description | Magnetic / Reed Switches MDSM-4B 5276 12-23 | Magnetic / Reed Switches MDSM-4B 5276 12-18 | Magnetic / Reed Switches |
| 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 | - |
| Contact Form | SPST | SPST | - |
| Operate Range | 12 AT to 23 AT | 12 AT to 18 AT | - |
| Voltage Rating AC | 140 VAC | 140 VAC | - |
| Color | Clear | Clear | - |
| Termination Style | Axial | Axial | Axial |
| Packaging | Bulk | Bulk | Case |
| Contact Position | Normally Open | Normally Open | - |
| Illumination Color | - | - | - |
| Mounting | SMD/SMT | SMD/SMT | - |
| Series | MDSM-4 | MDSM-4 | MDSM-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 | 100 | 100 | 100 |
| Subcategory | Switches | Switches | Switches |