The **KLS-1-3-R** is a specific electronic component typically categorized as a **DIP (Dual In-line Package) Switch**. These components are widely used on printed circuit boards (PCBs) to manually set configurations, addresses, or logic states. --- ### 1. Technical Specifications The "3" in the part number generally indicates the number of individual switch positions (poles) available on the component. | Feature | Specification (Typical) | | :--- | :--- | | **Switch Type** | DIP / Slide Type | | **Number of Positions** | 3 Positions (3-Pole Single Throw) | | **Pitch** | 2.54mm (0.1 inch) - Standard Breadboard Friendly | | **Contact Rating** | 25mA @ 24VDC (Switching); 100mA @ 50VDC (Steady State) | | **Mounting Type** | Through-Hole (THT) | | **Actuator Style** | Raised (indicated by "-R") | | **Operating Temp** | -20°C to +70°C | --- ### 2. Physical Construction The part is designed for longevity and reliable electrical contact. * **Housing:** Usually made of UL94V-0 high-temperature thermoplastic (usually blue or red). * **Contacts:** Gold-plated or tin-plated copper alloy to prevent oxidation. * **Actuator (-R):** The "R" suffix usually denotes a **Raised Actuator**, making it easier to toggle with a fingernail or a small tool compared to "Recessed" versions. * **Sealing:** Often comes with a top tape seal to protect the contacts during wave soldering and cleaning processes. --- ### 3. Pinout and Circuitry Internally, each switch position operates as a simple **SPST (Single Pole Single Throw)** toggle. ```text Top View (3-Position): ON [ ] [ ] [ ] |1| |2| |3| OFF [ ] [ ] [ ] | | | Pin 1 ---| | |--- Pin 6 Pin 2 ---| | |--- Pin 5 Pin 3 ---| | |--- Pin 4 ``` *When Switch 1 is moved to "ON", Pin 1 and Pin 6 are electrically connected.* --- ### 4. Common Applications * **Address Setting:** Used in industrial RS-485 or DMX networks to set a unique ID for a device. * **Configuration:** Selecting between different modes (e.g., Baud rate, Celsius vs. Fahrenheit) on a sensor module. * **Logic Inputs:** Providing a manual High (1) or Low (0) signal to a microcontroller (MCU) pull-up/down resistor circuit.