12V DC INPUT JACK

A 12V DC female jack is a common type of power connector, often called a barrel connector, used to receive 12V Direct Current (DC) power from an external power supply or adapter. It's typically mounted on the chassis or circuit board of an electronic device.

Key Features and Uses

• Function: The female jack serves as the power input port on an electronic device (like a router, CCTV camera, LED lighting, or development board like an Arduino) to accept a mating male DC plug from a power adapter.

• Voltage Rating: While these connectors are available for various low voltages, the "12V" in the name specifies that this particular component is intended for use in a 12-volt DC system.

• Gender: In the electronics industry, the female jack is typically defined as the part that does not have the center pin. Instead, it has a central hole to accept the male plug's center pin.

• Dimensions: DC barrel connectors come in various sizes, but two common standards are frequently used for low-voltage devices:

  • 5.5 mm (Outer Diameter) x 2.1 mm (Inner Diameter)

  • 5.5 mm (Outer Diameter) x 2.5 mm (Inner Diameter)

Polarity (Important Safety Note)

DC connectors have a specific polarity, meaning one conductor is positive (+) and the other is negative (-).

• Standard Polarity: For barrel connectors, the most common standard is center pin positive (+) and the outer sleeve negative or ground (-).

• Non-Standard Polarity: Some devices may use the reverse polarity (center negative, outer sleeve positive). Always check the diagram on your device or power supply to ensure correct polarity, as using the wrong polarity can damage your equipment.