12V DC Power Terminal Block Connector – Plug Adapter for TV, CCTV Camera, LED Strip & SMD Wire Connection

DC power terminal block connectors combining a standard 5.5×2.1mm DC barrel jack (or plug) with a screw clamp terminal block — allowing bare wire to be connected to DC-powered equipment without soldering. The screw clamp accepts stripped wire directly; tighten the screw to secure. Used for connecting bare wire power supplies to CCTV cameras, LED strip lights, and other 12V DC equipment that uses standard 5.5×2.1mm DC barrel connectors.

Key Specifications

• DC Connector: 5.5mm OD / 2.1mm ID barrel (standard 12V DC size)
• Configurations: Female jack + terminal block (for connecting to equipment with male DC plug); Male plug + terminal block (for connecting to equipment with female DC jack)
• Voltage Rating: 12–24V DC
• Current Rating: 3–5A (depending on terminal block design)
• Wire Entry: Screw clamp, accepts 20–16AWG (0.5–1.5mm²)
• Quantity: 4, 10, or 40 pieces (select above)

5.5×2.1mm vs 5.5×2.5mm DC Barrel Connectors

• 5.5×2.1mm (this product): The most common DC barrel connector size for 12V equipment. Used by: most CCTV cameras, LED drivers, Arduino power supplies, and generic 12V adapters. The 2.1mm center pin is the standard for most consumer and industrial 12V equipment.
• 5.5×2.5mm: Slightly larger center pin (2.5mm). Used by some laptop power supplies, higher-current 12V equipment, and some industrial power supplies. A 2.1mm plug will fit loosely in a 2.5mm jack and may cause intermittent connection — always verify the center pin size before ordering.
• Verification: Measure the center pin OD with a caliper, or check the equipment’s power supply specifications. Most CCTV and LED equipment uses 2.1mm; most laptop-style power supplies use 2.5mm.

Frequently Asked Questions

How do I wire a DC terminal block connector?

The terminal block has two screw terminals: positive (+) and negative (-). Strip the wire 8–10mm. Insert the positive wire into the + terminal and tighten the screw. Insert the negative wire into the - terminal and tighten. Polarity convention: center pin = positive (+), outer barrel = negative (-) for most 12V equipment. Always verify the polarity of your specific equipment before connecting — reverse polarity can damage DC equipment.

What is the maximum current for these connectors?

3–5A depending on the terminal block design. For a 12V system: 5A × 12V = 60W maximum. For LED strip lights: a 60W LED strip draws 5A at 12V — at the limit of this connector. For higher-power LED installations (above 60W at 12V), use a dedicated screw terminal power distribution block and connect the LED strips directly, bypassing the DC barrel connector.

Can I use these connectors for CCTV camera power?

Yes. CCTV cameras typically draw 0.5–1.5A at 12V — well within the 3–5A rating. These connectors are the standard method for connecting bare wire power runs to CCTV cameras in installations where the power supply cable is run without a pre-terminated DC plug. Connect the positive wire to the + terminal and the negative wire to the - terminal, then plug the female jack into the camera’s DC power input.

What wire gauge should I use for 12V CCTV and LED power runs?

For CCTV cameras (0.5–1.5A): 18–20AWG (0.5–0.75mm²) for runs up to 30m. For LED strips (up to 5A): 16–18AWG (0.75–1.5mm²) for runs up to 10m; 14AWG (2.5mm²) for longer runs. Voltage drop is the limiting factor for 12V DC runs — keep voltage drop below 0.5V (4% of 12V) for reliable equipment operation.

Typical Applications

• CCTV: Connecting bare wire power runs to CCTV camera DC power inputs
• LED strip lighting: Connecting bare wire power supplies to LED strip DC inputs
• Arduino & electronics: Connecting bare wire power to Arduino and microcontroller DC power jacks
• 12V accessories: Connecting bare wire to any 12V equipment with a 5.5×2.1mm DC barrel connector
• DIY electronics: Creating custom DC power connections without soldering

Package Contents

4, 10, or 40 pieces (select above) — DC power terminal block connectors (male or female, as selected).