Adafruit Push-button Power Switch Breakout

The Adafruit Push-button Power Switch Breakout lets you toggle DC power on and off with a simple button press. A latching analogue circuit uses a 3A P-FET to connect or disconnect the input to the output — press once to turn on, press again to turn off. It works with 3–14V DC at up to 3A, with only 0.5 µA quiescent current when off.

A KILL pin allows your project to programmatically turn itself off — apply 1V or more to instantly disconnect the FET and keep power off even if the button is pressed. An on-board red LED indicates when the output is active.

Key Features

• Latching Push-Button Control – Press once for on, press again for off; built-in debouncing
• 3A P-FET Switch – Handles up to 3A continuous (FET may warm at max current)
• 3–14V DC Range – Works with a wide range of DC power sources
• 0.5 µA Quiescent Current – Ultra-low standby draw when off
• KILL Pin – Apply 1V+ to programmatically turn off the load and keep it off
• Active LED Indicator – Red LED lights up when output is on
• Breadboard Friendly – 0.1" header and four mounting holes
• Replaceable Button – Includes a 12 mm tactile switch; solder in your own if preferred

Important Considerations

• DC voltages only (3–14V) — not for AC mains switching
• No air-gap isolation (solid-state FET, not mechanical)
• Body diode in the FET allows reverse current if the load voltage exceeds the input
• Very bouncy switches may cause rapid on/off toggling instead of clean latching

Ideal For

• Battery-powered project power control
• Self-shutdown capability for microcontroller projects (via KILL pin)
• Clean on/off switching for portable electronics
• Replacing toggle switches with a momentary push button

Package Contents

• 1× Adafruit Push-button Power Switch Breakout (assembled and tested)
• 1× 12 mm tactile button
• 1× 0.1" male header strip (requires soldering)