The part number **48SV2-RV5WST-R** identifies a specific variant of a **rotary potentiometer/encoder** typically used in automotive electronics, industrial controls, and high-end consumer appliances. Below is a detailed breakdown of its electronic components and specifications. --- ### 1. General Specifications This component is part of a series often manufactured by companies like **ALPS Alpine** or specialized automotive component vendors. It is designed for compact spaces and high durability. | Feature | Specification | | :--- | :--- | | **Type** | Rotary Sensor / Potentiometer | | **Technology** | Resistive (Contact-based) | | **Rotation Angle** | Usually 300° to 360° (Continuous or Limited) | | **Mounting Type** | Surface Mount (SMD) / Reflow Solderable | | **Operating Temperature** | -40°C to +85°C (Automotive Grade) | --- ### 2. Part Number Breakdown While specific internal codes vary by manufacturer, the nomenclature generally follows this logic: * **48SV2**: Refers to the series size and housing style (approximately 4.8mm to 5mm profile height). * **RV**: Indicates "Resistive Variable" (Potentiometer function). * **5W**: Refers to the power rating or specific resistance taper (often Linear). * **ST**: Denotes "Surface Mount" with specific terminal alignment. * **R**: Indicates "Tape and Reel" packaging for automated assembly. --- ### 3. Electrical Characteristics This part is engineered for precision signal feedback rather than power handling. * **Resistance Value:** Typically ranges from **5kΩ to 10kΩ** (standard for signal sensing). * **Tolerance:** ±20% is common for these resistive elements. * **Voltage Rating:** Usually designed for low-voltage logic circuits (5V DC to 12V DC). * **Linearity:** High precision (typically <2% deviation) to ensure the output voltage accurately reflects the physical position of the knob. --- ### 4. Mechanical & Material Construction * **Substrate:** Ceramic or high-grade polymer base to withstand reflow soldering temperatures. * **Wiper:** Multi-finger precious metal contact to reduce electrical noise and increase life cycles. * **Housing:** Heat-resistant resin. * **Shaft/Rotor:** Designed for a D-interface or cross-slot interface for mechanical coupling. --- ### 5. Common Applications Due to its small footprint and "ST" (Surface Mount) design, it is frequently found in: 1. **Automotive Dashboards:** Air conditioning (HVAC) temperature dials and volume knobs. 2. **Medical Equipment:** Precision adjustment for handheld diagnostic tools. 3. **Smart Home:** Thermostats and motorized blind controls. ---