Pimoroni
2.1mm Plug/Jack to Screw Terminal Block - Male
$4.95
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A handy adapter that converts a 2.1 mm DC barrel jack (female socket) into a screw terminal block. Plug a wall adapter or barrel-plug cable into the jack end...
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A handy adapter that converts a 2.1 mm DC barrel jack (female socket) into a screw terminal block. Plug a wall adapter or barrel-plug cable into the jack end, and access the power lines via labelled +/− screw terminals on the other — no soldering required.
Key Features
- 2.1 mm DC Barrel Jack – Standard centre-positive female socket accepts barrel plugs
- Screw Terminal Block – Tool-free wire connection, labelled +/−
- No Soldering Needed – Screw down bare wires for a secure, removable connection
Tip: Need the opposite? The Female version has a barrel plug (male) instead, for connecting wires to a barrel jack input.
Ideal For
- Breaking out wall adapter power to bare wires for breadboards or PCBs
- Quick prototyping without soldering a DC jack onto your board
- LED strip and accessory power wiring
Package Contents
- 1× 2.1 mm Jack to Screw Terminal Block Adapter (Male)
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.
- LED
- A light-emitting diode (LED) is a small electronic component that emits light when current flows through it in the correct direction. Because it only conducts one way, its polarity matters, and a through-hole LED must be soldered the correct way around to light up.
- screw terminal
- A connector that clamps bare wire using a small screw, making it easier to attach and remove wires without soldering. Screw terminals are useful for power wiring or thicker wires that are not suited to small plug-in connectors.
- Terminal block
- A terminal block is a connector that joins wires together in a neat, removable, or serviceable way, usually clamping each wire under a screw or spring instead of soldering. It makes it easier to connect, change, or service wiring without permanent joints.
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