The **A16-R** typically refers to a series of **miniature pushbutton switches** (often manufactured by brands like Omron). These are industrial-grade components designed for control panels, pilot lights, and human-machine interfaces. --- ### 1. General Specifications The A16 series is characterized by its sub-assembled design, allowing for customization of the button shape, color, and switching action. | Feature | Specification | | :--- | :--- | | **Mounting Hole** | 16mm diameter (Circular) | | **Contact Type** | SPDT (Single Pole Double Throw) or DPDT | | **Switching Capacity** | 3A at 250 VAC / 5A at 125 VAC | | **Illumination** | Available in LED or Incandescent | | **Degree of Protection** | IP65 (Oil-resistant) | --- ### 2. Key Component Parts An A16-R switch is usually composed of three main modular parts that snap together: #### A. The Operator (The "R" Suffix) The **"R"** in A16-R usually denotes a **Rectangular** head shape. * **A16-C:** Circular * **A16-S:** Square * **A16-R:** Rectangular #### B. The Switch Unit (Case) This contains the mechanical movement and the electrical contacts. It can be configured as: * **Momentary:** The switch returns to its original position when released. * **Alternate (Latching):** The switch stays pressed until pushed a second time. #### C. The Lamp (Optional) If the unit is illuminated, it will contain a small LED or incandescent bulb available in various voltages (5V, 12V, 24V, or 100/200V). --- ### 3. Electrical Pinout (Typical) The rear of the A16-R unit typically features solder terminals or tab terminals arranged as follows: 1. **C (Common):** The main input terminal. 2. **NO (Normally Open):** Connection is made only when the button is pressed. 3. **NC (Normally Closed):** Connection is broken when the button is pressed. 4. **L+ / L-:** Terminals specifically for the internal lamp/LED. --- ### 4. Applications * **Industrial Control Panels:** Emergency stops or start/stop sequences. * **Test Equipment:** Small-form factor toggles. * **Arcade/Kiosk Interfaces:** Due to the tactile click and high durability. ---