Ugreen UG- 20841 USB-C to 4*USB 3.0 Hub

The UGREEN UG-20841 functions as a USB Type-C expansion hub that transforms a single USB-C port into four USB 3.0 Type-A ports. This hub addresses port scarcity on modern ultrabooks, tablets, and laptops that feature limited USB connectivity.

USB 3.0 Data Transfer Performance

The UG-20841 implements USB 3.0 (also designated as USB 3.1 Gen 1) technology across all four downstream ports. Consequently, each port delivers theoretical bandwidth up to 5 Gbps, which translates to practical transfer speeds approaching 500 MB/s under optimal conditions. This represents a 10x improvement over USB 2.0’s 480 Mbps maximum throughput.

Furthermore, the hub supports simultaneous data transfers across multiple ports. The 5 Gbps bandwidth is shared among active devices, meaning total throughput divides according to current usage patterns. For example, transferring data on two ports simultaneously allocates approximately 2.5 Gbps to each active connection.

Individual Port Power Switching

Each of the four USB 3.0 ports on the UGREEN UG-20841 provides up to 900mA of power per port, adhering to USB 3.0 power delivery specifications. This capacity accommodates most bus-powered peripherals including external hard drives, flash drives, keyboards, mice, and webcams without requiring external power sources.

The hub incorporates intelligent power management that distributes available current efficiently across connected devices. However, power-hungry peripherals such as external DVD drives or portable monitors may require supplemental power through dedicated adapters.

Backward Compatibility Architecture

The UG-20841 maintains full backward compatibility with USB 2.0 and USB 1.1 devices. Older peripherals function normally when connected to the hub’s USB 3.0 ports, though they operate at their native speeds rather than USB 3.0 rates. This compatibility ensures legacy devices remain functional without requiring separate USB 2.0 hubs.

Additionally, the hub negotiates connection speeds automatically. When USB 2.0 devices connect, the specific port adjusts to USB 2.0 signaling while other ports maintain USB 3.0 capability for SuperSpeed devices.

Plug-and-Play Operation

The UGREEN UG-20841 operates without driver installation on major operating systems. Upon connection, the host device recognizes the hub immediately and activates all four ports. This driver-free functionality simplifies deployment and eliminates software compatibility concerns.

The hub draws power exclusively from the USB-C host port, eliminating external power adapter requirements for the hub itself. This bus-powered design enhances portability and reduces cable management complexity in mobile work environments.

Physical Construction and Design

The UG-20841 features a compact aluminum alloy chassis measuring approximately 98mm × 34mm × 16mm. This slim profile makes the hub suitable for travel alongside laptops and tablets. The aluminum construction provides several functional advantages:

• Superior heat dissipation during sustained high-bandwidth transfers
• Structural rigidity protecting internal circuitry from physical impact
• EMI (Electromagnetic Interference) shielding that prevents signal degradation
• Premium aesthetic matching modern laptop designs

Moreover, the hub includes a braided USB-C cable approximately 15cm in length. The integrated cable design prevents separation from the hub body, while the braided exterior provides abrasion resistance and tangle prevention.

LED Activity Indicators

An integrated blue LED indicator illuminates when the hub receives power from the host device. This visual feedback confirms proper connection and active status. The LED remains continuously lit during operation, providing immediate verification of hub functionality.

USB-C Host Connection

The UG-20841 connects to host devices via USB Type-C connector. The USB-C interface provides reversible plug orientation, eliminating insertion direction concerns. The hub supports both standard USB-C ports and Thunderbolt 3/4 ports, though it operates at USB 3.0 speeds regardless of host capabilities.

It’s important to note that the hub requires USB-C ports with data transfer capability. Some USB-C ports on devices serve exclusively for charging and lack data functionality. Therefore, users should verify their USB-C port supports data before expecting hub operation.

Multi-Device Connectivity Scenarios

The four-port configuration accommodates various peripheral combinations simultaneously:

• External mouse and keyboard plus two storage devices
• Wired network adapter, flash drive, smartphone charging cable, and printer
• Multiple flash drives for data transfers between storage media
• Card readers, security keys, and other authentication devices

Each connected device operates independently without requiring users to disconnect and reconnect peripherals when switching tasks.

Chipset Technology

The UGREEN UG-20841 utilizes a VL812 chipset from VIA Labs. This proven controller IC manages USB traffic distribution across the four downstream ports while maintaining USB 3.0 specification compliance. The VL812 chipset provides:

• Robust error detection and correction mechanisms
• Efficient power management reducing unnecessary current draw
• Hot-plug support allowing device connection/disconnection during operation
• Wide operating system compatibility without custom driver requirements

• Interface Specifications

  • Upstream Connection: USB Type-C male connector
  • Downstream Ports: 4× USB 3.0 Type-A female ports
  • USB Standard: USB 3.0 (USB 3.1 Gen 1) compliant
  • Data Transfer Rate: Up to 5 Gbps per hub (shared across ports)
  • Individual Port Speed: Up to 5 Gbps when used exclusively
  • Backward Compatibility: USB 2.0 (480 Mbps) and USB 1.1 (12 Mbps)

  Power Specifications

  • Power Source: USB bus-powered (no external adapter required)
  • Per-Port Power Output: Up to 900mA at 5V (USB 3.0 specification)
  • Total Hub Power Consumption: Approximately 2.5 watts maximum
  • Power Management: Intelligent current distribution across active ports
  • External Power Input: Not supported (bus-powered only)

  Chipset and Controller

  • Controller IC: VIA Labs VL812 USB 3.0 hub controller
  • Hot-Plug Support: Yes (connect/disconnect devices during operation)
  • Over-Current Protection: Individual port protection circuits
  • Error Correction: Built-in USB signal integrity management
  • UASP Support: USB Attached SCSI Protocol for improved storage device performance

  Physical Construction

  • Housing Material: Aluminum alloy
  • Color Finish: Space gray aluminum
  • Dimensions: Approximately 98mm × 34mm × 16mm
  • Weight: Approximately 55 grams
  • Cable Length: 15 centimeters (integrated)
  • Cable Type: Braided nylon exterior with copper core
  • Connector Strain Relief: Reinforced at both USB-C and hub body junctions

  Operational Features

  • LED Indicator: Blue power/activity light
  • Operating Temperature: 0°C to 45°C
  • Storage Temperature: -10°C to 60°C
  • Humidity Range: 10% to 90% non-condensing
  • Cooling Design: Passive aluminum heatsink (fanless)
  • Acoustic Noise: 0 dB (silent operation)

  Operating System Compatibility

  • Windows: 7, 8, 8.1, 10, 11 (32-bit and 64-bit)
  • macOS: Mac OS X 10.6 Snow Leopard and later
  • Linux: Ubuntu 14.04+, kernel 2.6.31 and newer
  • Chrome OS: Supported on USB-C enabled Chromebooks
  • Driver Requirements: None (plug-and-play with inbox drivers)

  Device Compatibility

  • Laptops: MacBook Pro/Air, Dell XPS, HP Spectre/EliteBook, Lenovo ThinkPad, Microsoft Surface
  • Tablets: iPad Pro (USB-C models), Samsung Galaxy Tab series
  • Desktop Computers: Mac Mini, iMac, Windows desktops with USB-C
  • Thunderbolt Support: Compatible with Thunderbolt 3 and Thunderbolt 4 ports (operates at USB 3.0 speeds)

  Supported Peripheral Types

  • Storage Devices: USB flash drives, external hard drives, SSD enclosures, card readers
  • Input Devices: Keyboards, mice, trackpads, drawing tablets, game controllers
  • Audio Devices: USB microphones, DACs, audio interfaces (within power limits)
  • Other Peripherals: Webcams, printers, scanners, security keys, wireless adapters

  Data Transfer Features

  • Simultaneous Transfers: Multiple ports active concurrently
  • Bandwidth Allocation: Dynamic sharing of 5 Gbps across active connections
  • Transfer Protocol Support: Bulk, isochronous, interrupt, and control transfers
  • File System Support: All file systems supported by host operating system