Adafruit
3.5mm / 1.1mm to 5.5mm / 2.1mm DC Jack Adapter
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$3.45
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A push-fit DC barrel jack adapter that converts a 3.5/1.1 mm DC plug to the standard 5.5/2.1 mm DC barrel jack format. Simply push it onto the smaller plug u...
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A push-fit DC barrel jack adapter that converts a 3.5/1.1 mm DC plug to the standard 5.5/2.1 mm DC barrel jack format. Simply push it onto the smaller plug until it clicks into place — no soldering or tools required.
Key Features
- Click-Fit Connection – Push onto the plug until it clicks securely
- 3.5/1.1 mm to 5.5/2.1 mm – Converts small-barrel DC plugs to the most common barrel jack size
- Compact Adapter – Small inline form factor, no cable needed
Ideal For
- Connecting small-barrel DC devices to standard 5.5/2.1 mm power supplies
- Adapting solar panels with small DC plugs to charger boards
- Any project requiring DC barrel jack size conversion
Package Contents
- 1× DC Jack Adapter (3.5/1.1 mm to 5.5/2.1 mm)
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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