The **S-3A13-R** is a specific electronic component, most commonly identified as a **tactile switch** (or tact switch) manufactured by companies like **Copal Electronics** (Nidec). These switches are used to provide manual input in electronic circuits. --- ### 1. Key Technical Specifications The "S-3" series typically denotes a side-actuated or vertical micro-tactile switch designed for surface mount or through-hole applications. | Parameter | Typical Value | | :--- | :--- | | **Type** | Tactile Switch | | **Circuit Configuration** | SPST (Single Pole Single Throw) | | **Switching Function** | Off - (On) [Momentary] | | **Contact Rating** | 100mA @ 12VDC | | **Operating Force** | 1.57 N (approx. 160gf) | | **Mounting Type** | Surface Mount (SMD) / J-Lead | | **Operating Temperature** | -25°C to +70°C | --- ### 2. Physical Characteristics * **Actuator Style:** Usually a small plunger or button. * **Orientation:** The "A" in the part number often signifies the orientation (e.g., top-actuated). * **Packaging ("-R"):** The suffix **-R** usually indicates that the parts are supplied on **Tape and Reel**, which is standard for automated Pick-and-Place assembly lines. * **Sealing:** These components are often "washable" or sealed to withstand soldering processes. --- ### 3. Pinout and Circuit Representation Since it is an SPST switch, it has a simple Normally Open (NO) configuration. ```mermaid graph LR A[Terminal 1] --- B((Switch)) B --- C[Terminal 2] style B fill:#f9f,stroke:#333,stroke-width:2px ``` --- ### 4. Common Applications Due to its small footprint and reliability, the S-3A13-R is used in: * **Consumer Electronics:** Reset buttons on routers, volume buttons on handheld devices. * **Industrial Controls:** User interface panels and membrane switch backups. * **Automotive:** Dashboard controls or keyless entry fobs. * **Medical Devices:** Small diagnostic equipment interfaces. ---