DC connectors are commonly available in the following types

DC connectors are commonly available in the following types

1. Circular Coaxial Barrel Connectors (Mainstream)

• 5.5×2.1mm: The most universal type, used for routers, surveillance cameras, set-top boxes and other 12V/2A devices.
• 5.5×2.5mm: Designed for high current, commonly seen on speakers, power amplifiers and some laptop power adapters.
• 4.0×1.7mm: Compact size for tablets, portable gadgets and small home appliances.
• 3.5×1.35mm: Miniature connector for webcams, Bluetooth speakers and low-power 5V devices.
• 2.5×0.7mm: Ultra-mini connector for headsets, smart bands and miniature modules.
• 6.5×3.0mm: For industrial and high-power equipment such as 24V devices, industrial controllers and high-power LED lights.

Structural styles

• Fork terminal connector: Equipped with two inner spring pieces for stable contact and firm connection; the most widely used style.
• Straight pin connector: Features a one-piece inner metal sleeve, simple structure and low cost.

2. USB DC Connectors (5V Low Voltage / PD Fast Charging)

• USB-A Male: Delivers 5V/1–2A power, used for traditional speakers, electric fans and LED light strips.
• USB-C Male: Supports USB-PD protocol with 5–20V output and 3–5A current, applied to thin-and-light laptops, portable monitors and fast-charging devices.
• Micro-USB Male: Once popular for older Android devices and power bank inputs, now gradually phased out.

3. Car Cigarette Lighter Connectors (12V/24V)

• Car Cigarette Lighter Male Plug: Draws 12V power from vehicles for power inverters, car refrigerators and tire inflators.
• Anderson Powerpole: Rated for 15–45A current, anti-reverse connection, ideal for RVs, storage batteries and portable power stations.

4. Industrial & Aviation Connectors (High Power / Anti-Vibration)

• GX12/GX16/GX20 Aviation Plugs: Available in 2 to 12 pins, waterproof and shockproof, for industrial control equipment and outdoor instruments.
• XT60/XT90 RC Connectors: Support 30–90A high current, widely used for drones, power tools and battery packs.

5. Other Common Connectors

• DC Female Jack: The matching socket installed on electronic devices for corresponding male connectors.
• D-Tap (P-Tap): Dedicated to video cameras and camera batteries with 14.4V power supply.
• MC4 Connector: Exclusive for solar panels, featuring waterproof and anti-reverse connection design.

Quick Selection Guide

• Ordinary household devices: 5.5×2.1mm
• High-current equipment / Laptops: 5.5×2.5mm
• Miniature devices / 5V products: 3.5×1.35mm / USB-C
• Vehicles / Outdoor use: Cigarette lighter plug / Anderson Powerpole
• Industrial equipment / RC models: GX Aviation plug / XT60