KEYPAD 4X4 MATRIX BLACK

The 4x4 Matrix 16-Button Black Keypad is a professional-grade input device that brings reliable, tactile user interaction to your electronics projects. Built with a durable plastic housing and rubber-dome contacts beneath each key, this keypad offers a satisfying tactile click and key travel with every press, providing both visual and physical feedback to the user.

The keypad is arranged in a standard 4×4 matrix configuration, meaning all 16 buttons can be read using only 8 microcontroller GPIO pins (4 rows + 4 columns). The keys are clearly labeled with molded white characters for excellent visibility and long-term durability — the markings will not fade or rub off like printed labels. The keypad layout includes digits 0–9, letters A–D, and the symbols * and #, making it suitable for both numeric and alphanumeric input applications such as PIN entry, access control, calculators, and menu navigation.

The keypad terminates in a single-row 0.1-inch (2.54mm) pitch header, which is breadboard-friendly and compatible with standard Dupont jumper wires and PCB sockets. Of the 10 solder pads, 8 carry electrical signals while the two outer pads are purely mechanical anchors for stable connection. The four corner mounting holes (2mm diameter) allow the keypad to be securely fastened to project enclosures, control panels, or custom chassis using M2 screws.

With a key lifespan of over 1,000,000 actuations, this keypad is built to last through years of use in commercial, industrial, and educational applications. It is fully supported by the popular Arduino Keypad library, making software integration quick and easy.

Specifications

• Type: 4×4 Matrix Keypad with Tactile Rubber-Dome Switches
• Number of Keys: 16 (0–9, A–D, *, #)
• Color: Black with White Molded Characters
• Material: Plastic Housing with Rubber-Dome Contacts
• Switch Type: Tactile (Rubber-Dome)
• Key Lifespan: >1,000,000 operations per key
• Connector: Single-row 10-pin header (8 signal + 2 mechanical)
• Connector Pitch: 0.1 inch (2.54 mm) — Breadboard Friendly
• Operating Voltage: Compatible with both 3.3V and 5V logic systems
• Maximum Current: 30 mA per key (typical)
• Keypad Dimensions: 68.6 × 66 mm (Height × Width, including header extension)
• Pad Size: 64 × 50 × 10 mm (L × W × H)
• Panel Cutout Required: 60 × 60 mm
• Mounting Hole Diameter: 2 mm (compatible with M2 screws)
• Mounting Hole Center Distance: 60 × 58 mm
• Space Between Keys: 6 mm
• Each Key Dimension: 8.3 × 7.3 mm (L × W)
• Weight: ~23 g
• Operating Temperature: 0°C to +50°C
• Compliance: RoHS Compliant

Applications

• Password & PIN Entry Systems — secure access for doors, gates, and safes
• Smart Lock Systems — DIY electronic combination locks
• Access Control Panels — keypad-based authentication for offices and labs
• DIY Calculator Projects — hobbyist computing builds
• Menu Navigation Interfaces — controlling LCD- and OLED-based menus
• Alarm Systems — arm/disarm with PIN entry
• Industrial Control Panels — operator input for embedded systems
• Robotics Control — manual command input for robot operations
• Vending Machine Prototypes — product selection and code entry
• Telephone-Style Dialers — DIY phone and intercom projects
• Educational & STEM Projects — teaching matrix scanning and input handling
• POS (Point of Sale) Devices — input for hobby-level transaction systems
• Home Automation Panels — keypad-triggered scenes and commands
• Test Equipment Interfaces — input for DIY meters and analyzers
• IoT Devices — local input on WiFi-connected smart products
• Replacement Keypad — upgrading or repairing existing 4×4 panels