The **LSMT2-111G0-R** is a high-performance, surface-mount (SMT) tactical switch. These components are commonly used in consumer electronics, industrial controls, and medical devices where a physical user interface (button) is required. --- ### 1. Key Technical Specifications The following table summarizes the primary electrical and mechanical characteristics of the LSMT2-111G0-R: | Parameter | Specification | | :--- | :--- | | **Switch Type** | Tactile Switch | | **Actuation Force** | 160gf (Grams-force) | | **Switch Function** | Off-Mom (Momentary) | | **Mounting Type** | Surface Mount (SMD/SMT), Gull Wing | | **Contact Rating** | 50mA @ 12VDC | | **Operating Life** | ~100,000 Cycles | | **Dimensions** | 3.5mm x 2.6mm (Ultra-miniature) | | **Operating Temp** | -40°C to +85°C | --- ### 2. Physical Construction The part is designed for high-density PCB layouts. Key physical features include: * **Miniature Footprint:** Its small size makes it ideal for wearable technology and portable devices. * **Actuator Type:** Usually features a standard plunger or "button" top made of heat-resistant plastic to withstand reflow soldering. * **Contact Material:** Typically silver-plated stainless steel or copper alloy to ensure low contact resistance and high reliability. * **Termination:** Gull-wing leads allow for easy visual inspection of solder joints during manufacturing. --- ### 3. Functional Operation The LSMT2-111G0-R is a **Momentary SPST (Single Pole Single Throw)** switch. 1. **Resting State:** The circuit is "Open" (NO - Normally Open). No current flows. 2. **Actuated State:** When a user presses the button, the internal metal dome collapses, creating a bridge between the contacts and "Closing" the circuit. 3. **Release:** Once the pressure is removed, the tactile dome snaps back to its original shape, breaking the connection and providing "tactile feedback" (a physical click). --- ### 4. Common Applications * **Consumer Electronics:** Smartphones, Bluetooth headsets, and remote controls. * **Medical:** Handheld diagnostic tools and portable monitors. * **Computing:** Reset buttons or power buttons on small peripheral devices.