The **LHZ-11D-R** is a specific type of **Rotary Potentiometer with an Integrated Push-Switch**. These components are widely used in consumer electronics, automotive controls, and audio equipment where both variable resistance and a momentary digital signal (the button press) are required in a single interface. --- ### 1. Technical Specifications The "LHZ-11D-R" designation usually refers to an 11mm size rotary switch. Below are the typical electrical and mechanical characteristics for this series: | Parameter | Specification | |:---|:---| | **Form Factor** | 11mm Vertical / Horizontal Mount | | **Total Resistance** | Commonly 10kΩ to 100kΩ (model dependent) | | **Resistance Taper** | Linear (B) or Logarithmic (A) | | **Power Rating** | 0.05W | | **Voltage Limit** | 50V AC / 20V DC | | **Switch Type** | SPST (Momentary Push) | | **Rotational Life** | 15,000 to 30,000 Cycles | --- ### 2. Functional Components The device is comprised of two distinct electronic systems housed in a single body: #### A. The Potentiometer (Analog) * **Three-terminal resistor:** Consists of a resistive track and a sliding contact (wiper). * **Variable Voltage Divider:** As the shaft rotates, the resistance between the middle pin and the side pins changes, allowing for precise control over analog signals (like volume or brightness). #### B. The Push-Switch (Digital) * **Tactile Feedback:** Located at the base of the shaft. * **Operation:** When the shaft is pressed vertically, it closes a circuit. This is typically used for "Enter/Select" functions or "Power On/Off." --- ### 3. Pin Configuration The LHZ-11D-R generally features **5 main pins** plus mounting brackets: 1. **Pins 1, 2, 3:** The Potentiometer terminals (Input, Wiper/Output, Ground). 2. **Pins 4, 5:** The Push-Switch terminals (Normally Open). 3. **Mounting Tabs:** Two side metal legs used for structural stability on the PCB (usually soldered to the ground plane). --- ### 4. Common Applications * **Car Audio:** Volume control knob that also acts as a "Mute" or "Menu" button when pressed. * **Home Appliances:** Microwave timers or oven temperature settings. * **Industrial Panels:** Navigating digital menus on small LCD screens. * **Computer Peripherals:** Scroll wheels or specialized macro controllers. --- ### 5. Schematic Symbol Representation ```text [Potentiometer] [Switch] (CW) 3 o-----------o 4 (Wiper) 2 o---/ | (Push) (CCW) 1 o-----------o 5 ```