4 pin tactile switch SMD 5.2X5.2

The 4-pin tactile switch SMD 5.2×5.2 is a momentary, normally‑open SPST switch designed for automated surface‑mount assembly. Despite having four terminals, it functions as a single‑pole single‑throw (SPST) device: two pins connect to each of the switch’s contact sides, providing mechanical anchoring and electrical redundancy. This four‑pad layout increases solder joint reliability and withstands the mechanical stress of repeated actuation.

As a SMD tactile push button switch, it is engineered for low‑profile applications where board space is at a premium. The 5.2 mm x 5.2 mm base footprint fits standard 0.65 mm pitch solder pads, while the actuator height is typically just 1.5 mm to 2.5 mm above the PCB, enabling integration into slim handheld devices, wearables, and membrane keypad overlays. Its momentary action closes the contacts only when the button is pressed; releasing the button immediately breaks the circuit, making it perfect for signal inputs, wake‑up keys, and function selectors.

This surface mount tactile switch 5.2×5.2mm is also characterised by a distinct tactile snap that provides clear user feedback. The operating force is commonly 160 gf or 260 gf, suiting everything from light‑touch consumer controls to industrial panels that require deliberate actuation. Gold‑plated contacts ensure stable low‑resistance switching even for dry‑circuit logic levels, while a sealed housing design can protect against dust and moisture ingress during reflow soldering and product life. For deeper background on tactile switch technology, see the Electronics Tutorials switch guide.

Whether you are looking for a reliable mini tactile switch SMD for a prototype or a production‑qualified, tape‑and‑reel packaged component, the 4‑pin 5.2×5.2mm footprint delivers an ideal mix of space efficiency, robust tactile response, and long operational life.