4 Port USB 3.0 Hub - USB Type-A to 1x USB-C & 3x USB-A - Commercial Metal USB Hub - SuperSpeed USB 3.2 Gen 1 (5Gbps)- Self Powered - BC 1.2 Fast Charge - Mountable/Rugged

Questions & Answers

Can a USB hub be used without a power adapter, and how does this affect performance?
Yes, a USB hub can be used without a power adapter , but doing so reduces the available power to connected devices and may prevent high‑power devices from functioning properly. Explanation Some USB hubs can operate without an external power adapter by drawing power directly from the host computer’s USB port. In this configuration, the available power is shared across all ports on the hub, which limits the amount of power delivered to each connected device. As a result, high‑power USB devices—such as external hard drives—may not start or may function unreliably when connected to an unpowered hub. When a power adapter is connected, the USB hub can supply more power to each port than a single computer USB port can provide. This improves overall stability and compatibility with power‑intensive devices. Low‑power USB devices, such as keyboards and mice, typically function without issues on an unpowered hub. Additionally, USB devices that use their own external power adapters rely on the hub only for data transfer and do not draw power from the hub. Recommendation For consistent performance and full device compatibility, using the included power adapter is recommended whenever it is available.

What DC barrel connector power plug types do StarTech.com products use, and what are their dimensions?
StarTech.com DC barrel connector plug types are defined in the “Plug Type” field of the technical specifications, using a letter code that specifies the connector’s outer diameter (OD) and inner diameter (ID) in millimeters for power adapter compatibility. Explanation: In StarTech.com technical specifications, the “Plug Type” field is a standardized identifier for the exact DC barrel connector size required to power a product. Each plug type is assigned a letter code that corresponds to a specific combination of outer diameter (OD) and inner diameter (ID), measured in millimeters. Common DC barrel plug type dimensions Plug Type OD ID A 2.35 mm 0.7 mm B 4.0 mm 1.7 mm C 4.75 mm 1.7 mm H 3.4 mm 1.3 mm L 5.0 mm 2.5 mm M 5.5 mm 2.1 mm N 5.5 mm 2.5 mm The DC barrel connector plug type must match both the outer diameter and inner diameter exactly. A mismatch between the StarTech.com product requirement and the power adapter connector can prevent proper fit or stable power delivery, which may result in device startup failure or intermittent operation. The plug type defines only the physical connector size. The plug type does not define electrical power requirements such as voltage, current, or polarity. The power adapter used with a StarTech.com product must match the product’s specified electrical requirements. Using an incompatible power adapter can cause device malfunction or permanent damage. This standardized DC barrel connector plug type system enables IT professionals and procurement teams to verify connector dimensions, ensure power adapter compatibility, standardize hardware deployments, and identify the correct replacement power supply for StarTech.com products.