The **LC2-3B-R/Q** is a specific variant of a mechanical limit switch or microswitch, often used in industrial control circuits, household appliances, and automotive electronics. Below is a detailed breakdown of its electronic and mechanical specifications. --- ### 1. General Specifications The part number typically refers to a **Subminiature Microswitch**. Here is the general technical profile: | Feature | Specification | | :--- | :--- | | **Contact Configuration** | Single Pole Double Throw (SPDT) | | **Actuator Type** | Short Hinge Roller Lever | | **Current Rating** | 3A to 5A (depending on manufacturer) | | **Voltage Rating** | 125V / 250V AC | | **Terminal Type** | PCB Solder Terminals / Quick Connect | | **Operating Force** | ~50g to 150g | --- ### 2. Electronic Functionality (SPDT) The device operates as a **Single Pole Double Throw** switch. It contains one input (Common) and two potential outputs. * **COM (Common):** The moving contact point where power enters. * **NC (Normally Closed):** The circuit is complete when the switch is at rest (not pressed). * **NO (Normally Open):** The circuit is completed only when the lever is depressed. ### 3. Component Breakdown The switch consists of the following internal electronic and mechanical parts: 1. **Silver Alloy Contacts:** Used to ensure low electrical resistance and prevent oxidation over thousands of cycles. 2. **Snap-Action Spring:** A beryllium copper or stainless steel spring that ensures the "snap" movement. This minimizes electrical arcing by moving the contacts quickly regardless of the speed of the physical press. 3. **Hinge Roller Lever (The "R" Suffix):** The "R" usually denotes a **Roller**. This allows the switch to be triggered by a cam or a moving part with minimal friction. 4. **Terminal Leads:** Usually tinned for easy soldering or gold-plated for low-current signal applications. --- ### 4. Part Number Decoder (Typical) While manufacturers vary, the suffix usually follows this logic: * **LC2:** Series identifier (Subminiature size). * **3B:** Rating code (3 Amps). * **R:** Actuator style (Roller Lever). * **Q:** Terminal style (Quick-connect or specific PCB pitch). --- ### 5. Common Applications * **Computer Peripherals:** Detecting the position of a printer carriage. * **Safety Interlocks:** Ensuring a microwave door is closed before operation. * **Industrial Automation:** End-of-travel detection for small motorized slides.