The **LSMT4-1241-R/Q** refers to a high-quality surface-mount (SMT) tactile switch, typically used in consumer electronics and industrial interfaces where a low profile and tactile feedback are required. ### 1. Key Technical Specifications Below are the general specifications typical for this component series: | Property | Specification | | :--- | :--- | | **Type** | Tactile Switch (Momentary) | | **Mounting Style** | Surface Mount (SMT / SMD) | | **Actuation Force** | ~160gf to 250gf (Commonly 160gf) | | **Contact Arrangement** | SPST (Single Pole Single Throw) | | **Switch Travel** | ~0.25 mm | | **Current Rating** | 50 mA | | **Voltage Rating** | 12 VDC | | **Operating Life** | 100,000 to 500,000 cycles | --- ### 2. Physical Characteristics The "1241" in the part number often indicates the specific height or physical dimensions of the actuator. * **Size:** Compact footprint (usually around 4.5mm x 4.5mm or similar). * **Actuator:** Usually a hard plastic or metal dome under a stem. * **Termination:** Gull-wing leads for surface mounting. * **Packaging:** The "R/Q" suffix usually denotes **Tape and Reel** packaging, optimized for automated pick-and-place machines in mass production. --- ### 3. Typical Applications These switches are found in devices where space is limited but user interaction is necessary: 1. **Consumer Electronics:** Remote controls, cameras, and wearable devices. 2. **Computing:** Reset buttons on motherboards or peripherals. 3. **Industrial:** Handheld scanners and control panels. 4. **Automotive:** Dashboard buttons and key fobs. --- ### 4. Circuit Diagram Internally, the switch acts as a simple push-to-make contact: ```text (Normally Open) Pin 1 ----/ ---- Pin 2 Pin 3 ----/ ---- Pin 4 (Pins are often paired internally) ``` ---