The **AD3V-S1A-R3** is a specific model of a **Miniature Micro Switch** (often categorized under Snap Action Switches). These components are widely used for detection, limit switching, and human-machine interface triggering due to their high reliability and distinct tactile feedback. --- ### 1. General Specifications The following table summarizes the typical technical parameters for this class of switch: | Parameter | Specification | | :--- | :--- | | **Switch Type** | Snap Action / Micro Switch | | **Actuator Type** | Pin Plunger (Standard) | | **Circuitry** | SPDT (Single Pole Double Throw) | | **Current Rating** | Typically 3A to 5A (depending on voltage) | | **Voltage Rating** | 125V / 250V AC | | **Terminal Type** | Solder Terminals / Quick Connect | | **Operating Force** | Light to Medium (approx. 1.47N) | --- ### 2. Key Features * **Snap Action Mechanism:** Utilizes a spring-loaded internal blade that "snaps" between contacts. This ensures rapid switching regardless of the speed at which the actuator is pressed, preventing electrical arcing. * **Compact Design:** The "Miniature" form factor allows it to be integrated into tight spaces such as computer mice, household appliances, or industrial control panels. * **Long Mechanical Life:** Designed for millions of cycles, making it ideal for high-frequency use. * **Gold or Silver Contacts:** Depending on the specific sub-version, these switches use high-conductivity materials to ensure low contact resistance. --- ### 3. Connection Diagram (SPDT) The switch typically features three pins, which function as follows: | Pin Label | Function | Description | | :--- | :--- | :--- | | **COM** | Common | The main input power/signal source. | | **NC** | Normally Closed | Connected to COM when the switch is **not** pressed. | | **NO** | Normally Open | Connected to COM only when the switch **is** pressed. | ```python # Simple Logic Representation if switch_pressed: circuit = "Closed (COM to NO)" else: circuit = "Closed (COM to NC)" ``` --- ### 4. Typical Applications 1. **Safety Interlocks:** Detecting if a microwave door or a printer cover is closed. 2. **End-stop Detection:** Used in 3D printers or CNC machines to signal that an axis has reached its physical limit. 3. **Consumer Electronics:** Buttons in joysticks, mice, and small kitchen appliances. 4. **Industrial Controls:** As a sensor to detect the presence of an object on a conveyor belt. ---