Specifications

• Model: DC-04M.

• Plug barrel size: 5.5 mm outer diameter (OD) × 2.1 mm inner diameter (ID).

• Physical dimensions: approx. length 50 mm, width ~14 mm, height ~12 mm; weight ~9 g.

• Application: DC power connector (male) commonly used in CCTV / surveillance systems.

• Gender: Male plug (to mate with female DC jack/socket).

• Marking/polarity: The product states “marked polarity” for easier identification during installation.

• Material: Typical plastics + metal contacts (though exact alloy not always specified). One listing says “internal contacts: copper or nickel-plated brass”.

  • Ensure your device’s female DC socket is 5.5 mm × 2.1 mm to match the DC-04M plug size (OD × ID). If the socket is 5.5×2.5 mm or 4.0×1.7 mm, the fit may be loose or incompatible.

  • Confirm the polarity (centre positive or centre negative) of the device and the plug’s wiring before connecting. A mismatch in polarity can damage the device.

  • When wiring: strip the cable, solder or crimp the conductors to the plug contacts as per manufacturer instructions. Make sure outer barrel of plug connects to the outer conductor (usually negative) and centre pin/inner to positive (if that is the system).

  • Provide strain relief: ensure the cable entering the plug is not bent sharply or stressed, which can damage solder joints.

  • After installing, test the connection with a multimeter for proper voltage and polarity before connecting to the end device (camera, sensor, etc.).

  • Use in appropriate voltage/current range: Although exact current rating for this model isn’t always listed, typical similar 5.5×2.1 mm barrel connectors in CCTV use up to maybe 2-5 A depending on cable and plug quality. So ensure the plug is used within safe load limits.