Matrix Keypad Plastic 3×4 12 Keys

This 3×4 Matrix Keypad Module is a robust hard plastic numeric keypad featuring 12 tactile push buttons arranged in a 3-column by 4-row matrix configuration. Unlike thin membrane keypads, this keypad features durable ABS plastic construction with individually raised square push buttons, providing satisfying tactile click feedback and significantly longer operational lifespan. The integrated PCB board at the base houses the matrix wiring and exposes standard 2.54mm through-hole pins for easy breadboard and development board connections.

The matrix design requires only 7 microcontroller pins (4 rows + 3 columns) to scan all 12 keys, making it efficient for projects with limited GPIO availability. Corner mounting holes on the plastic housing allow secure installation into custom enclosures, control panels, and project boxes, giving your build a professional and polished finish. The raised button design provides tactile confirmation and is more resistant to accidental keypresses compared to flat membrane alternatives.

Compatible with Arduino, Raspberry Pi, ESP32, STM32, and all common microcontroller platforms, this keypad works seamlessly with the standard Arduino Keypad Library. The PCB pin interface allows direct insertion into breadboards or connection via jumper wires. Perfect for access control panels, door lock systems, PIN entry terminals, calculators, menu-driven interfaces, and any project requiring reliable numeric user input with a durable and professional-looking keypad.

Specification :

• Keypad Type: Hard plastic push button matrix keypad with PCB
• Configuration: 3 columns × 4 rows (3×4 matrix)
• Total Keys: 12 keys (1-9, 0, *, #)
• Key Layout: 1, 2, 3 / 4, 5, 6 / 7, 8, 9 / *, 0, #
• Interface Pins: 7 pins (4 rows + 3 columns)
• Pin Type: Through-hole PCB pins (2.54mm pitch)
• Button Type: Tactile push button (individual raised keys)
• Housing Material: ABS hard plastic
• PCB: Integrated green PCB with matrix wiring
• Mounting Holes: 4 × corner mounting holes
• Key Color: Black with white printed labels
• Operating Voltage: 3.3V – 5V DC
• Max. Current: 100mA
• Compatible Platforms: Arduino, Raspberry Pi, ESP8266, ESP32, STM32, PIC
• Library Support: Arduino Keypad Library, Python GPIO libraries