The **2MS-2-R** refers to a specific series of **sub-miniature sealed toggle switches**, commonly manufactured by brands like **Dailywell** or **Taiway**. These switches are designed for telecommunications, instrumentation, and medical equipment where space is limited and protection against environmental factors (like dust or moisture) is required. --- ## 1. Component Specifications The "2MS" series follows a standardized nomenclature. Here is the technical breakdown of the 2MS-2-R: | Feature | Specification | | :--- | :--- | | **Switch Type** | Toggle Switch (Sub-miniature) | | **Circuitry** | SPDT (Single Pole Double Throw) | | **Switch Function** | ON-NONE-ON | | **Contact Rating** | 3A @ 120VAC or 28VDC; 1.5A @ 250VAC | | **Electrical Life** | 30,000 make-and-break cycles at full load | | **Contact Resistance** | 20 mΩ max. initial @ 2-4VDC | | **Insulation Resistance** | 1,000 MΩ min. | | **Operating Temperature** | -30°C to 85°C | --- ## 2. Key Features * **Sealed Construction:** The "R" in the suffix often denotes **RoHS Compliance**, but in the context of the series design, these switches feature an internal O-ring seal on the bushing and epoxy terminal seals. This prevents contamination during soldering and cleaning. * **Compact Footprint:** Designed for PCB mounting or small panel cutouts where standard toggle switches would be too bulky. * **Actuator Options:** Usually features a standard brass, chrome-plated toggle lever. --- ## 3. Terminal and Mounting Styles Depending on the specific sub-variant, the 2MS-2 series supports various mounting styles: 1. **Solder Lug:** For manual wiring. 2. **PC Thru-Hole:** For direct mounting on a Printed Circuit Board. 3. **Right Angle / Vertical Right Angle:** For edge-mounting on boards. --- ## 4. Materials Composition ```markdown - Case & Bushing: Glass filled nylon 6/6, flame retardant, heat stabilized (UL94V-0). - Actuator: Brass, chrome plated with internal O-ring seal. - Switch Support: Brass, tin plated. - Contacts/Terminals: Silver or Gold plated copper alloy. ``` ---