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

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

These 12mm tactile momentary pushbutton switches with red 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 red cap is the universal convention for STOP, RESET, or emergency actions. 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: Red (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

• Pins 1 & 2 (one side): internally connected
• Pins 3 & 4 (other side): internally connected
• Press button: all 4 pins connected
• Connect one side to Arduino digital input (INPUT_PULLUP), other side to GND

Typical Applications

• STOP / Reset / Emergency button: Red color convention for stop or reset actions
• Arduino reset button: Manual reset trigger for microcontroller circuits
• Multi-button panels: Color-coded button arrays for game controllers and HMI panels
• Emergency stop: Prominent red button for safety-critical stop functions
• Interrupt trigger: Hardware interrupt source for event-driven programs

Package Contents

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

Snap-action, audible click, breadboard-friendly 4-pin layout, red 12mm cap — pack of 5 for STOP/reset button arrays and Arduino prototyping.

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