Adafruit
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...
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)
Jargon buster
Plain-language definitions for the technical terms used above.
- breakout
- A breakout is a small circuit board that makes a tiny or hard-to-solder component easier to connect to with standard pins. It matters because this OLED module can be wired into a microcontroller project without needing to solder directly to the display’s fine contacts.
- LED
- A light-emitting diode is a small electronic component that lights up when current flows through it in the correct direction. In this kit, LEDs create the flashing effect, so polarity and correct soldering matter for the project to work.
- microcontroller
- A microcontroller is a small computer on a chip that runs your program and controls connected inputs and outputs. For this product, it is the part that reads buttons and sensors, drives the display and speaker, and communicates over Bluetooth.
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