Screw Terminal Block to 2.1mm Center-Positive Barrell Jack Power Adapter (Male/Female Pair) | 4-Pack


  • Maximum Current: 5 Amps; Maximum Voltage: 24 VDC
  • Premium Quality: Double layer (injection moulded) provides a reliable polarity connection and electric insulation
  • Easy to install: no-soldering or crimping needed
  • Includes 4x Female/Male pairs (8 adapters total)



This listing includes 4x Female/Male pairs of DC power barrel jacks to screw terminal adapters. They are specially useful for connecting wires to power supplies as is often required in our DIY electronics projects. Without them, we usually cut the connector from the supply or battery to tie the stripped wires together with those going into our project. These adapters allow for a more robust and convenient solution. On one end, we find two screw terminals spaced 5 mm apart and labeled positive and negative. On the other, it has a 2.1mm, center-positive connector that plugs into most “standard”, wall wart-style power supplies.

So, if you need to connect a battery pack or wired power supply to a board that has a DC (barrel) jack, this adapter will come in very handy! These connector adapts a 5.5 × 2.1 mm DC barrel jack to a pair of screw terminals spaced 5 mm (0.2″) apart. The terminals are labeled positive and negative, with the positive terminal connected to the center pin—this so-called positive-tip configuration is the most common.


  • 8-pack of Screw Terminal to Power Jack adapters, 4 × Female/Male pairs
  • Screw terminals are spaced 5 mm apart, and the color of the terminal is blue
  • The 5.5 × 2.1 mm DC barrel jack has a center-positive polarity







Additional information

Item Weight

0.028 ounces

Package Dimensions

2 x 1 x 0.5 inches



Item model number


Date First Available

January 12, 2017

Color Name

DC Power

Material Type

Plastic (diffused)


2.1mm (Barrel Jack)


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