Adafruit
2.1mm to 2.5mm DC Barrel Plug Adapter
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$2.05
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Only 4 left
A simple adapter that sits inside a 5.5 / 2.5 mm DC barrel jack, allowing you to use a standard 5.5 / 2.1 mm barrel plug with it. Just insert the adapter int...
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A simple adapter that sits inside a 5.5 / 2.5 mm DC barrel jack, allowing you to use a standard 5.5 / 2.1 mm barrel plug with it. Just insert the adapter into the device's 2.5 mm jack, then plug in your 2.1 mm power supply as normal.
Key Features
- 2.5 mm to 2.1 mm Conversion – Adapts a 2.5 mm ID jack to accept a 2.1 mm ID plug
- 5.5 mm Outer Diameter – Standard outer barrel size, compatible with common DC supplies
- Compact & Passive – Small insert with no active circuitry
Ideal For
- Using standard 2.1 mm wall adapters with devices that have a 2.5 mm jack
- Avoiding the need to buy a separate power supply for each connector size
Package Contents
- 1× 2.1 mm to 2.5 mm DC Barrel Plug Adapter
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.
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