The **KSS2GLFS** is a specific model of a sub-miniature side-actuated SMT (Surface Mount Technology) tact switch manufactured by **C&K Components** (now part of Littelfuse). It is widely used in consumer electronics, medical devices, and automotive interfaces due to its extremely low profile and durability. --- ### 1. Key Technical Specifications The electrical and physical characteristics of the KSS2GLFS are summarized in the table below: | Feature | Specification | | :--- | :--- | | **Contact Type** | SPST (Single Pole Single Throw), Normally Open (NO) | | **Actuation Force** | 2.0 Newtons (approx. 200 grams) | | **Switching Power (Max)** | 1.0 VA | | **Switching Voltage (Max)** | 32 VDC | | **Switching Current (Max)** | 50 mA | | **Life Cycle** | 100,000 cycles | | **Operating Temperature** | -40°C to +85°C | | **Mounting Style** | Gullwing (SMT) | --- ### 2. Physical Design and Dimensions The "KSS" series is known for its **side-actuated** design, meaning the button is pushed from the side relative to the PCB surface, rather than from the top. * **Low Profile:** The height of the body is only 1.6mm, making it ideal for slim devices like smartphones or wearable tech. * **Gullwing Terminals:** The "G" in the part number stands for **Gullwing**, which refers to the shape of the metal leads used for soldering. * **Tactile Feedback:** Despite its small size, it provides a distinct "click" sensation (haptic feedback) to the user. --- ### 3. Part Number Breakdown (KSS2GLFS) Understanding the nomenclature helps in identifying the exact variant: | Prefix/Suffix | Meaning | | :--- | :--- | | **KSS** | Series Name (Sub-miniature side-actuated) | | **2** | Actuation Force (2.0 N) | | **G** | Terminal Type (Gullwing) | | **LFS** | Lead-Free Silver plating (RoHS compliant) | --- ### 4. Typical Applications Because of its small footprint and side-entry actuation, this part is commonly found in: * **Mobile Handsets:** Volume rockers or power buttons. * **Wearables:** Smartwatches and fitness trackers. * **Medical Equipment:** Portable diagnostic tools. * **Automotive:** Key fobs and steering wheel controls. ---