5 PCS 2x2 Scan 4Key PCB Keypad Module Array Key Switch Module for Electrical Control Key benefits Readytouse 2x2 keypad modules for fast integration into control panels and prototypes. Saves development time by providing a prewired matrix of four keys on a PCB, ready for scan input. Compact, lowprofile design makes it easy to fit into small enclosures and retrofit existing equipment. Simplifies wiring and reduces assembly errors compared to individual switches. What it does Provides a 2 by 2 key matrix with four switch contacts arranged for scanning by a microcontroller or keypad controller. Each module is PCBmounted for stable mechanical support and straightforward solder or connector attachment. Designed for electrical control applications that require simple discrete inputs. Important attributes Quantity: 5 pieces per set for small production runs, , or multiple prototype iterations. Layout: 2x2 matrix, total of 4 keys. Mounting: PCBmounted key switch array for secure installation and consistent pin alignment. Compatibility: Works with standard keypad scanning circuits and microcontrollers or controllers that accept matrix key inputs. Size and footprint: Compact PCB form factor suitable for tight spaces; exact dimensions available from the product listing when needed. Performance: Intended for use as discrete input switches in control and interface circuits. Why customers choose this module Plug and play convenience when building simple user interfaces. Consistent wiring and repeatable performance across multiple units. Suitable for , retrofit, or designs where a small number of direct inputs are required. Typical applications Industrial control panels and machine interface modules that require a small set of user inputs. Electronics prototyping and hobby projects using microcontrollers or keypad controllers to detect button presses. Replacement or upgrade of worn 4key interfaces on instruments, test equipment, or custom control boxes. What to check before Confirm the pinout and mounting style match your PCB or connector requirements. Ensure your controller or scanning circuit supports a 2x2 matrix layout. This 5 piece set of 2x2 PCB keypad modules provides a practical, spaceefficient solution for adding four discrete, scancompatible inputs to control systems and electronic projects.