The part number **08-2-R** generally refers to a specific type of **Rotary Switch** or a **Power Inductor**, depending on the manufacturer. However, in the context of electronic components and standardized industry numbering, it most frequently refers to a **compact rotary selector switch** used in circuit board designs. Below is a breakdown of the component specifications and characteristics. ### 1. Component Identification | Category | Common Description | | :--- | :--- | | **Component Type** | Rotary Switch / Selector | | **Common Manufacturer** | Grayhill, Copal, or Bourns (specific series) | | **RoHS Status** | The suffix **-R** typically denotes **RoHS Compliance** (Lead-free) | | **Mounting Type** | Through-hole (TH) or Surface Mount (SMD) | --- ### 2. Technical Specifications While exact specs vary by the brand prefix, a standard "08-2-R" series component usually follows these parameters: * **Positions:** Often indicates a 2-position or 8-position configuration depending on the internal logic. * **Electrical Rating:** Usually low power (e.g., 100mA to 250mA at 28V DC). * **Contact Resistance:** Typically $< 50m\Omega$. * **Operating Temperature:** $-40°C$ to $+85°C$. --- ### 3. Application Use Cases These parts are designed for "set-and-forget" or user-interface adjustments on a PCB. * **Address Settings:** Setting the binary address for a device on a bus (like RS-485 or CAN). * **Mode Selection:** Choosing between different operating modes (e.g., Test Mode vs. Normal Mode). * **Configuration:** Adjusting gain or frequency steps in analog circuits. --- ### 4. Typical Internal Schematic For a rotary switch designated as 08-2-R, the internal wiring often looks like this: ```text [Common Pin] | ----------------- | | | [Pos 1] [Pos 2] [Pos 3...] ``` --- ### 5. Identification Checklist If you are trying to replace this part, check the following: 1. **The Manufacturer Logo:** Look for a "G" (Grayhill) or "C" (Copal). 2. **Physical Dimensions:** Measure the diameter (often 0.5 inches or 12mm). 3. **Termination Style:** Are the pins straight (Through-hole) or bent for Surface Mount?