The **48AV-4RHA-R** is a specific technical configuration for a **Rotary Selector Switch**, commonly used in industrial control panels, medical equipment, and telecommunications. Below is a detailed breakdown of its electronic and mechanical specifications. --- ## 1. Component Overview The "48AV" series generally belongs to the family of **Miniature Rotary Switches**. These are designed for logic-level switching where high reliability and a small footprint are required. | Feature | Specification | | :--- | :--- | | **Component Type** | Rotary Selector Switch | | **Mounting Type** | Through-hole (PCB Mount) | | **Orientation** | Right Angle (Horizontal) | | **Terminal Finish** | Gold over Nickel (R-Rating) | | **Actuator Style** | Shaft/Knob operated | --- ## 2. Technical Breakdown of the Part Number Parts like these follow a specific nomenclature. While different manufacturers (such as Grayhill or NKK) may have slight variations, the code typically breaks down as follows: ### **48AV** (Series Designation) * **48**: Represents the series size (Sub-miniature). * **AV**: Indicates the terminal style, specifically **Vertical Right Angle**. This allows the switch to be mounted on a PCB while the knob faces the user at a 90-degree angle to the board. ### **4RHA** (Configuration) * **4**: Often denotes the number of poles or the specific electrical circuit configuration. * **RHA**: Refers to the **Right Angle** housing and the indexing (the "click" felt when turning). It usually indicates a 4-position or 4-pole setup depending on the internal contact map. ### **-R** (Material/Environmental) * **R**: Typically stands for **RoHS Compliant** or **Gold Contacts**. Gold is preferred in low-voltage electronic parts because it prevents oxidation, ensuring a clean signal over thousands of cycles. --- ## 3. Electrical Specifications These parts are not designed for power switching (like turning on a motor) but rather for **signal switching**. * **Contact Rating:** Typically 0.4 VA max @ 28V AC/DC. * **Contact Resistance:** < 50 mΩ. * **Insulation Resistance:** > 1,000 MΩ at 500V DC. * **Dielectric Strength:** 500V AC for 1 minute. * **Mechanical Life:** Often rated for 10,000 to 30,000 cycles. --- ## 4. Common Applications * **Audio Equipment:** Channel selection or gain stepping. * **Industrial Controls:** Mode selection (Off/Manual/Auto). * **Medical Devices:** Sensitivity or program adjustments. * **Test & Measurement:** Range selection on handheld or benchtop meters. ---