The **9G-P16-R** is a specific electrical and mechanical component, primarily identified as a **Limit Switch** or **Micro Switch**, often used in industrial automation, elevator systems, or safety interlock mechanisms. Below is a detailed breakdown of its electronic and physical characteristics. --- ### 1. Technical Specifications This part is designed to act as a bridge between physical motion and an electrical signal. | Feature | Specification (Typical) | | :--- | :--- | | **Component Type** | Snap-action Micro Switch / Limit Switch | | **Contact Configuration** | SPDT (Single Pole Double Throw) | | **Current Rating** | 10A - 16A (depending on voltage) | | **Voltage Rating** | 125V / 250V AC | | **Actuator Type** | Roller Plunger / Lever (R-suffix indicates Roller) | | **Connection Type** | Quick Connect Terminals or Solder Lugs | --- ### 2. Internal Electronic Construction The device consists of three primary conductive paths: 1. **COM (Common):** The terminal where the input current enters. 2. **NC (Normally Closed):** The path is complete when the switch is in its resting state. 3. **NO (Normally Open):** The path is complete only when the actuator is pressed. **The "Snap-Action" Mechanism:** The "9G" series typically utilizes a high-tension spring. This ensures that the electrical contacts move instantly once the trip point is reached, preventing "arcing" (electrical sparks) that can damage the terminals over time. --- ### 3. Part Number Breakdown While manufacturer codes vary slightly, the nomenclature generally follows this logic: * **9G:** The series designation (often related to high-durability industrial standards). * **P16:** Indicates the amperage rating (16 Amps) or the specific physical housing size. * **R:** Stands for **Roller**. This means the switch is triggered by a wheel or cam-driven mechanism rather than a flat button, reducing friction and wear on the actuator. --- ### 4. Common Applications * **Industrial Gates:** Detecting when a door is fully closed. * **Elevators:** Leveling sensors to ensure the floor alignment is correct. * **Conveyor Belts:** Counting items as they pass over the roller. * **Safety Interlocks:** Cutting power to a machine if a guard rail is moved. ---