Tactile Momentary Pushbutton Switch White Cap 12mm — 4-Pin Breadboard (5-Pack)

Tactile Momentary Pushbutton Switch — White Cap, 12mm, 4-Pin Breadboard (5-Pack)

These 12mm tactile momentary pushbutton switches with white snap-on caps are the standard pushbutton for Arduino prototyping and electronics education. The 4-pin through-hole design fits directly into a solderless breadboard on standard 0.1" spacing, the snap-action mechanism provides a satisfying audible click for positive tactile feedback, and the white cap makes the button easy to see and press. Pack of 5 — enough for a full project with spares.

Electrical Specifications

• Contact Style: Normally Open (NO) — momentary closure when pressed
• Terminals: 4-pin (2 pairs of internally connected pins)
• Tested Ratings: Up to 1A @ 32V DC (contact resistance <0.01Ω after testing)
• Action: Snap-action with audible click
• Cap Color: White (snap-on, replaceable)
• Body Dimensions: 12 × 12 × 7.3mm (without cap)
• Total Height with Cap: 12mm
• Lead Spacing: 5.08mm × 12.7mm (0.2" × 0.5") — breadboard compatible
• Pack Quantity: 5 switches

4-Pin Layout — How It Works

The switch has 4 pins arranged in two pairs. Each pair of pins on the same side of the switch body is internally connected. When the button is pressed, all 4 pins are connected together. For breadboard use, connect one pair to signal/power and the other pair to ground — the switch bridges them when pressed.

• Pins 1 & 2 (one side): internally connected
• Pins 3 & 4 (other side): internally connected
• Press button: all 4 pins connected

Arduino Wiring (Standard)

• One side of switch → Arduino digital input pin (with INPUT_PULLUP enabled)
• Other side of switch → GND
• When pressed: input reads LOW | When released: input reads HIGH
• No external resistor needed when using INPUT_PULLUP

Typical Applications

• Arduino input button: The standard pushbutton for Arduino tutorials and projects
• Reset button: Manual reset for microcontroller circuits
• Menu navigation: OK/Select button for LCD menu systems
• Game controller: Action button for Arduino-based games
• Interrupt trigger: Hardware interrupt source for event-driven programs

Package Contents

• 5 × Tactile momentary pushbutton switch with white 12mm snap-on cap

The classic Arduino pushbutton — snap-action, audible click, breadboard-friendly 4-pin layout, white 12mm cap. Pack of 5 for prototyping and spares.

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