Adafruit
2.1mm DC Power Jack with Slide Switch
A 2.1 mm DC barrel jack with a built-in slide switch, giving you simple on/off control for devices that lack a dedicated power switch. It shares the same PCB...
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A 2.1 mm DC barrel jack with a built-in slide switch, giving you simple on/off control for devices that lack a dedicated power switch. It shares the same PCB footprint as a standard non-switched barrel jack, so it drops straight into existing designs without layout changes.
Plug in your power supply (up to 16 VDC, 3 A), then use the labelled slide switch to toggle power on and off — no more unplugging cables every time you want to cut power.
Key Features
- Integrated Slide Switch – Labelled on/off toggle on top of the jack
- Standard 2.1 mm Barrel Jack – Compatible with common DC wall adapters
- Same PCB Footprint – Drop-in replacement for non-switched barrel jacks
- Rated up to 16 VDC, 3 A – Suitable for most maker and prototyping projects
Ideal For
- Adding a power switch to boards that don't have one
- Custom enclosures and project boxes
- Prototyping and bench setups where quick power toggling is convenient
Package Contents
- 1× 2.1 mm DC Power Jack with Slide Switch
Jargon buster
Plain-language definitions for the technical terms used above.
- DC
- DC means direct current, where electricity flows in one constant direction, as supplied by batteries, USB ports and many plug-pack power supplies. When a product specifies DC, it runs from a DC supply rather than mains AC, so you need to provide the correct voltage and polarity.
- DC barrel jack
- A round power connector commonly used for low-voltage DC power supplies, often described by its outer and inner diameters such as 5.5 x 2.1 mm. Matching the barrel size and polarity is important so the plug physically fits and powers the device correctly.
- PCB
- A printed circuit board (PCB) is a board, usually rigid, with etched copper tracks that connect electronic components together without loose wiring. Components are mounted on the board and signals route between them through the copper layout.
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