Technical data
Connection, type	DC connector (5.50 x 2.10 mm)
Connection 2, type	DC socket (5.50 x 2.10 mm)
Conductor, material	Copper
Colour version	Black
Colour	Black
Consumption unit	1 piece unpacked
Packaging type	Cable Tag
Max. current rating	5 A
Max. power	120 W
Cable length	3 m
Cable sheath diameter (approx.)	5 mm
Conductor, wire cross-section	0.5 mm²
Conductor, number	2
AWG	20
Input, voltage range	5 - 24 (DC) V

The Goobay DC extension cable (manufacturer number 71399) is a flexible cable for extending existing DC power connections. It features a DC plug (5.50 x 2.10 mm) at one end and a DC socket (5.50 x 2.10 mm) at the other, allowing it to be directly integrated into existing power supplies. The cable length is 3 m, with an outer diameter of approximately 5 mm. The cable is finished in black and is intended for powering devices operating within a voltage range of 5 to 24 V DC. The maximum current rating is 5 A, corresponding to a maximum power of 120 W. The inner conductors are made of copper with a cross-section of 0.5 mm² (equivalent to AWG 20) and consist of two conductors. The construction is designed for use in hobby and DIY applications.

Applications
This cable is suitable for a wide range of devices connected via a standard DC connector with dimensions 5.5 x 2.1 mm. Examples include LED light strips, routers such as the AVM Fritz!Box, electric toys, external hard drives, and surveillance cameras. The extension allows flexible positioning of the device or power supply without compromising power delivery. The maximum power of 120 W and current of 5 A are sufficient for most common consumers in private and small commercial environments.

Functions and Features in Detail
The cable is equipped with strain relief at both ends, reducing mechanical stress at the connector areas and protecting against premature cable breakage. The connector housings have a diameter of 9.5 mm, ensuring a secure and stable connection. The use of copper as the conductor material ensures good electrical conductivity. The flexible cable construction allows for easy handling and installation in various environments.

Technology Explained Simply
The conductor cross-section of 0.5 mm² (AWG 20) is sufficient for the specified current load of 5 A, with heat generation within the cable remaining within acceptable limits under normal operating conditions. The voltage range of 5 to 24 V DC covers most common devices connected via a DC plug with 5.5 x 2.1 mm dimensions. The extension is purely mechanical and electrical, without additional functions such as voltage regulation or protective circuits. The cable insulation is made of PVC, providing adequate mechanical and electrical insulation.

Compatibility and Accessories
The cable is compatible with all devices using a DC plug with dimensions 5.5 x 2.1 mm. It can be used in combination with other DC extension cables or power supplies, as long as voltage and current remain within the specified limits. It is not intended for industrial or professional applications, but exclusively for hobby and DIY use.

Installation and Mounting
Installation is performed by simply plugging the DC plug into the existing socket and the socket into the device’s plug. No additional tools or mounting aids are required. The strain relief construction at both ends facilitates installation, especially in tight or moving areas.

Operational Advantages
The extension enables flexible device placement without affecting power supply. The robust construction with strain relief extends the cable’s service life. The use of copper as conductor material ensures reliable power transmission. The cable is easy to handle and suitable for use in private and small commercial environments.