DELTA S-55 DC Power Plug 5.5x2.1mm Screw Terminal Connector

When setting up a CCTV camera or wiring an LED strip, you need a reliable way to connect the power supply without soldering. The DELTA S-55 quick-connect DC plug lets you terminate a cable in seconds using a screwdriver, giving you a solid 5.5x2.1mm male connector that fits standard power jacks. It is ideal for DIY electronics, security installations, and any low-voltage DC project where a secure, field-serviceable connection matters.

Key specifications

• Connector type: DC power plug, male
• Barrel dimensions: 5.5 mm outer diameter, 2.1 mm inner diameter
• Termination: screw terminals (2 poles: positive and negative)
• Electrical ratings: up to 30 V DC, 3 A
• Housing material: black PVC plastic
• Contact material: nickel-plated brass
• Cable entry: up to 6 mm diameter
• Operating temperature: -20°C to +70°C
• Insulation resistance: >100 MΩ at 500 V DC
• Contact resistance: <30 mΩ

Why choose it

No crimping tool or soldering iron is needed—just strip the wire, insert it into the screw terminal, and tighten. The nickel-plated brass contacts ensure low resistance and corrosion resistance, while the robust PVC housing withstands daily use. The standard 5.5x2.1mm size is compatible with countless power adapters and devices, making this plug a versatile spare part for repair kits and custom cable assemblies.

Ideal use cases

• Building or repairing DC power cables for CCTV cameras
• Connecting LED lighting strips to power supplies
• Creating custom power leads for routers, modems, and other electronics
• Prototyping and DIY electronics projects
• Replacing worn or damaged DC plugs on existing equipment

Good to know

The screw terminals accept stranded or solid wire and provide a vibration-resistant connection. Always observe correct polarity when wiring: the centre pin is typically positive, but check your device's requirements. The plug is designed for cable mounting and fits cables with an outer diameter up to 6 mm. For best results, use a small flat-head screwdriver and tighten the screws firmly without over-torquing.