DC Power Plug Male 2.1mm Screw Terminal Connector, Solderless

Specifications

• Plug Type: Male DC barrel plug
  
• Center Pin Diameter: 2.1mm
  
• Outer Diameter: 5.5mm (standard, compatible with most wall adapters)
  
• Termination: 2-pin screw terminal block (solderless)
• Body Material: Black ribbed plastic housing
  
• Polarity: Marked on terminal block (+ and −)

Minimum Hardware

• Small flathead or Phillips screwdriver  to open and tighten the 2-pin screw terminals; most terminal blocks of this size use a 2mm flathead
  
• Wire strippers  to expose bare copper on the wire ends before inserting into the terminal, since the screws bite into stripped wire, not insulation
  
• A DC power source or adapter cable to wire into  this plug is a connector, not a power source itself
  

Safety Warnings

• Polarity Warning: Double-check + and − markings on the terminal block before wiring — reversing polarity can damage whatever device this plug powers
  
• Screw Tightness Warning: Do not overtighten the terminal screws — stripped threads on plastic terminal housings won't grip the wire securely afterward
  
• Strain Relief Warning: Avoid pulling directly on the wire near the terminal block; a sudden yank can loosen the screw connection over time even if tightened well initially

Accessories Included in the Box:

• 1× Male DC Barrel Plug with 2-Pin Screw Terminal Block

Frequently Asked Questions

• Does this DC plug fit standard wall adapters?
  Yes, it uses the common 2.1mm x 5.5mm barrel size, which is compatible with the vast majority of wall adapters, CCTV cameras, and LED strip power supplies sold in India.
• Can I use this with a 2.5mm center pin device instead of 2.1mm?
  No, a 2.1mm plug will fit loosely or not connect properly in a 2.5mm socket — check your device's original adapter for the exact size before ordering.
• Is this compatible with Arduino power jacks?
  Yes, most Arduino boards use the same 2.1mm barrel jack standard, so this plug works for building custom Arduino power cables.
• Can I connect this to a battery pack instead of a wall adapter?
  Yes, since it's just a connector, you can wire it to any DC power source including battery packs, as long as voltage and polarity are correct for your target device.
• What's the maximum voltage this plug can handle?
  It's rated for typical DC barrel jack applications up to 24V DC, though always check your specific device's voltage requirement before wiring.
• What's the maximum current rating?
  It supports up to approximately 2A, which covers most small electronics, LED strips, and camera power applications — for higher current draws, use a connector explicitly rated for it.
• Can I use this for a 12V LED strip?
  Yes, 12V LED strips are well within this connector's typical voltage and current range, making it a common use case for this type of plug.
• Why isn't my device powering on after wiring this plug?
  Check that the screw terminals are tight and making contact with bare wire, not insulation, and confirm polarity matches your device's requirement.
• Why does my connection work sometimes but not consistently?
  This is usually a loose screw terminal — retighten the screws and check that the wire hasn't slipped partially out of the terminal opening.
• The center pin feels loose in my device's socket — is this normal?
  Some play is normal for barrel connectors, but if it feels excessively loose, double-check that you have the correct 2.1mm size rather than a 2.5mm mismatch.
• Why did my device get damaged after I wired this plug?
  This is most likely due to reversed polarity — always double-check + and − against your device's requirement before powering on for the first time.