40PC Lot SMD Button Switch 4X4X3MM Tactile Push Button Switch Momentary Overview A compact, surfacemount tactile switch pack for PCBmounted user inputs and electronic projects. Each switch provides momentary contact with a clear tactile response in a standard 4x4x3 mm footprint. Package of 40 pieces supplies spare parts for , prototyping, or small production runs. Key benefits Compact footprint saves board space while providing reliable tactile feedback for user input. Surfacemount design fits standard SMD PCB layouts and supports automated assembly workflows. Momentary action is ideal for pushtoactuate controls such as menu selection, reset, and signal input. Pack of 40 ensures you have replacements and extras for multiple builds or repairs. Consistent feel across switches helps maintain uniform user experience in multibutton designs. Important attributes Quantity: 40 pieces per lot Type: SMD tactile push button switch Dimensions: 4 x 4 x 3 mm (length x width x height) Function: Momentary normally open operation with tactile actuation Mounting: Surfacemount for PCB integration Use: Intended for electronic control inputs and signal switching on circuit boards Compatible applications and use scenarios and maintenance: worn or failed tactile switches on handheld controllers, remote units, and small appliances using standard 4x4 mm SMD footprints. Prototyping and development: Add reliable user input buttons to microcontroller and development board projects for menu navigation, mode selection, and manual inputs. Smallscale production: Fit multiple switches into compact device layouts for consumer electronics, test fixtures, and instrumentation panels. Installation notes Designed for integration on SMD PCBs. Verify footprint and pad layout match the 4 x 4 mm switch dimensions before assembly. Keep a set of spare switches from the 40 piece pack for troubleshooting and field repairs. This pack offers a practical, spaceefficient solution for repeated tactile inputs on PCBbased designs where a standardized 4x4x3 mm momentary switch is required.