The 4×5 Matrix Array 20 Key Membrane Switch Keypad Keyboard (COM56, R14) is a compact and durable input device designed for Arduino, microcontrollers, and DIY electronics projects. With 20 keys arranged in a 4×5 matrix layout, this keypad is perfect for projects that require multiple input options such as password entry, calculators, menu navigation, robotics, and automation systems.

This keypad features an ultra-thin design with adhesive backing, allowing easy and secure mounting on flat surfaces. The 9-pin DuPont connector (2.54mm pitch) makes it simple to connect directly to a microcontroller or breadboard for quick prototyping.

Built with high-quality soft-touch keys that offer up to 100 million life-strokes, this keypad is reliable, responsive, and ideal for long-term use in both industrial and home electronic projects.

Features:

• 20 tactile keys arranged in a 4×5 matrix format

• 9-pin DuPont connector (2.54mm pitch) for easy interfacing

• Ultra-thin membrane design with self-adhesive backing

• Soft-touch feel with fast rebound time (~1ms)

• Long lifespan – up to 100 million operations

• Can be scanned by microcontrollers to detect key presses

• Works with Arduino, Raspberry Pi, PIC, AVR, STM32, ESP32, and other MCUs

• Ideal for calculators, password input systems, robotics, and control panels

• Operating temperature: up to 60°C

Specifications:

• Key Layout: 4 rows × 5 columns = 20 keys

• Connector: 9-pin DuPont header, 2.54mm pitch

• Rebound Time: ~1 ms

• Lifespan: 100 million presses

• Operating Temperature: ≤ 60°C

• Mounting: Adhesive sticker backing for secure placement

• Dimensions: Compact, ultra-thin design

Applications:

• Arduino and microcontroller projects

• Password-protected access systems

• Custom calculators and digital input devices

• Robotics control panels

• Menu navigation interfaces

• Industrial and home automation