General
Connector type	QSFP28 to QSFP28
Cable length	0,5 m
Wire gauge	30 AWG
Cable jacket	PVC
Jacket colour	Black
Jacket OD	7 mm
Min. bending radius	37 mm
Supported data rates	100 / 40 Gbit/s
Maximum power consumption	2,5 W
Operating ambient temperature	0 to 70 °C

The product is a QSFP28 direct attach cable (DAC) from the brand Ubiquiti Networks, type UACC-DAC-QSFP28-0.5M, specifically designed for use in high-speed networks. It serves as a passive connection between two QSFP28-capable devices, such as switches or servers, and enables data transmission at a maximum rate of 100 Gbit/s. The cable connection is optimized for short distances and offers a cost-effective alternative to optical fiber cables, particularly in data centers or server rooms where high bandwidths are required over short distances.

Applications

The cable is intended for use in modern network environments where high data rates over short distances are required. Typical use cases include connecting network switches within a rack, linking servers to switches, or connecting storage and computing nodes within a data center. Compatibility with QSFP28- and QSFP+-interfaces expands its application possibilities, as it can be connected to a wide range of networking equipment.

Features and Specifications in Detail

The cable features a QSFP28 to QSFP28 connector type, enabling a direct, precise connection between two QSFP28 ports. The cable length is 0.5 meters, which is sufficient for most rack and server configurations. The use of 30 AWG wire ensures adequate conductivity and minimizes signal loss. The cable jacket is made of PVC, providing good mechanical stability and resistance to environmental influences. The jacket color is black, and the outer diameter of the jacket is 7 mm. The minimum bending radius of 37 mm protects the cable from mechanical damage during installation and ensures stable signal transmission.

Technology Explained Simply

A direct attach cable (DAC) is a passive copper cable that operates without additional power supply or signal amplification. Data transmission occurs over multiple individual copper conductors operated in parallel. In this model, a maximum data rate of 100 Gbit/s is supported, with 40 Gbit/s also being possible. The maximum power consumption is 2.5 W, which is very low due to the passive design. The operating ambient temperature ranges from 0 to 70 °C, enabling use in standardized server and network environments.

Compatibility and Accessories

The cable is compatible with QSFP28- and QSFP+-interfaces, allowing use with a wide range of networking devices including switches, routers, and servers. It is specifically designed for connecting devices in the high-speed range, where the maximum data rate of 100 Gbit/s supports performance for modern applications such as virtualization, cloud computing, or big data analytics. Use with other accessories, such as patch panels or rack extensions, is possible as long as the interfaces are compatible.

Installation and Mounting

Installation is performed by simply plugging the QSFP28 connectors into the corresponding ports on the devices. It is important to observe the minimum bending radius of 37 mm to avoid mechanical damage. The cable connection is immediately operational once the connectors are correctly inserted, as no additional configuration or power supply is required. The cable connection is designed for use in enclosed racks and server rooms, with the operating ambient temperature ranging from 0 to 70 °C.

Operational Advantages

The cable offers a cost-effective solution for high-speed connections over short distances. The passive design reduces power consumption and maintenance costs, as no additional components such as transceivers or power supplies are required. The high data rate of 100 Gbit/s enables fast and reliable data transmission, which is essential for time-critical applications in enterprise networks. Compatibility with QSFP28- and QSFP+-ports increases flexibility in device selection and simplifies integration into existing infrastructures.