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D-Link DUB-E250

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D-Link DUB-E250

Ports:
1x RJ-45 Ethernet (10/100/1000/2500 Mbps), 1x USB-C
Speed:
Up to 2500 Mbps; up to 4600 Mbps combined throughput in full-duplex mode (maker claim, optimal conditions)
USB standard:
USB 3.1 Gen 1, USB 3.0, USB 2.0

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Package details

Model: DUB-E250

DUB-E250 (single model, USB-C)

Condition:
Confirm new or reconditioned on the listing
Quantity:
Confirm package quantity on the listing

Important limit: Only 2500 Mbps per direction; the 4.6 Gbps figure is the sum of both full-duplex directions, not real-world throughput

How many units?

Confirm condition, quantity and included accessories on the retailer’s listing.

Specifications checked November 5, 2026. Full product details

Size and placement

Size and placement

Dimensions
53 x 21.5 x 15 mm (2.1 x 0.8 x 0.6 in)
Weight
28.5 g (1.0 oz)
Manufacturer specifications

D-Link DUB-E250 USB-C to 2.5G Ethernet Adapter

A compact USB-C adapter that adds a 2.5 GbE Ethernet port to laptops and desktops, with bus power and plug-and-play driver setup.

Why people pick it

  • 2.5 GbE port in one of the smallest adapters the maker sells (2.1 x 0.8 x 0.6 in)
  • Bus-powered over USB-C, so there is no power adapter to carry
  • Backward compatible with 10/100/1000 Mbps networks and auto crossover detection
  • Drivers install automatically from a built-in virtual CD on Windows; no separate download needed

Know before you buy

  • Only 2500 Mbps per direction; the 4.6 Gbps figure is the sum of both full-duplex directions, not real-world throughput
  • System requirements stop at Windows 10 and Mac OS 10.6 in the datasheet; newer Windows and macOS versions are not listed by the maker
  • No Linux support listed in the maker's specifications
  • USB 2.0 ports cap the link at lower speeds

Full specifications

Ports1x RJ-45 Ethernet (10/100/1000/2500 Mbps), 1x USB-C
SpeedUp to 2500 Mbps; up to 4600 Mbps combined throughput in full-duplex mode (maker claim, optimal conditions)
USB standardUSB 3.1 Gen 1, USB 3.0, USB 2.0
Backward compatibility10/100/1000 Mbps Ethernet and Auto-MDI/MDI-X crossover detection
StandardsIEEE 802.3, 802.3u, 802.3ab, 802.3bz (2.5GBASE-T), 802.3x, 802.3az, 802.1P, 802.1Q VLAN tagging
LEDsConnection (orange), Link/ACT (flashing white)
PowerUSB bus power, no power adapter; 250 mA operating, 60 mA standby; power-saving mode when the cable is unplugged
System requirements (maker)Windows 7/8/10, Mac OS 10.6 or later
Dimensions53 x 21.5 x 15 mm (2.1 x 0.8 x 0.6 in)
Cable length160 mm (6.3 in)
Weight28.5 g (1.0 oz)
Operating temperature10 to 45 C (50 to 113 F)
CertificationsCE, FCC, IC

From manufacturer documentation, checked November 5, 2026. Spotted an error? Tell us.

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Fastest wired port
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