The **S-R35PF** is a specific type of **Rotary Potentiometer with a Push-Pull Switch**. These components are widely used in consumer electronics, particularly in audio equipment like guitar amplifiers, mixers, and lighting controllers. Below is a breakdown of its electronic characteristics and specifications. --- ### 1. General Specifications The S-R35PF belongs to the carbon film resistor family. It combines a variable resistor (potentiometer) and a mechanical switch into a single unit to save space on a PCB (Printed Circuit Board). | Feature | Description | | :--- | :--- | | **Component Type** | Rotary Potentiometer with Push-Pull Switch | | **Resistor Material** | Carbon Film | | **Mounting Type** | Through-hole (PCB Mount) | | **Operation** | 300° Rotation / Linear Push-Pull Action | | **Common Application** | Tone/Volume control with mode switching | --- ### 2. Key Electronic Components #### A. The Potentiometer (Variable Resistor) This part controls the flow of current or voltage levels. * **Resistance Range:** Typically available from $1k\Omega$ to $1M\Omega$. * **Taper Types:** * *Linear (A):* Resistance changes proportionally to rotation. * *Logarithmic (B):* Resistance changes exponentially (common for human ear volume perception). * **Tolerance:** Standardly $\pm 20\%$. * **Power Rating:** Usually rated at $0.05W$ to $0.1W$ due to its small size. #### B. The Push-Pull Switch The "PF" suffix often denotes the integrated switch mechanism. * **Switch Type:** DPDT (Double Pole Double Throw) or SPST (Single Pole Single Throw). * **Function:** Activating the switch does not change the resistance; it acts as a secondary circuit toggle (e.g., "Coil Splitting" in guitars or "Power On/Off"). * **Voltage/Current Rating:** Typically handles DC 12V at 1A or AC 125V at 0.3A. --- ### 3. Pin Configuration The S-R35PF generally features two distinct sets of pins: 1. **Potentiometer Terminals (3 Pins):** * `Pin 1`: Input / Ground * `Pin 2`: Wiper (Adjustable output) * `Pin 3`: Input / Ground 2. **Switch Terminals (2-6 Pins):** Located at the base of the component, separate from the resistive track. --- ### 4. Technical Drawing Representation ```text [ Shaft ] <-- Rotate for Resistance / Push-Pull for Switch || |----------| | Casing | |----------| / | | | \ <-- Potentiometer Pins (Output/Wiper) | _ _ _ | | | | | | <-- Switch Pins (Independent Circuit) ```