Categorization：Harness Component
Inside high-speed electronic devices, extremely thin coaxial cables often take on tasks of connecting displays, cameras, and high-speed data signals. Therefore, engineers often pay attention to a question when selecting: Can extremely thin coaxial cables support the 10Gbps transmission of USB 3.1 Gen 2? The answer cannot be simply understood as "all extremely thin coaxial cables support" or "do not support", the key depends on the connector, cable material, impedance, length, structure, and the overall SI performance of the high-speed link. Taking I-PEX 82445-100B-02-D as an example, this model belongs to CABLINE®-UA II 50Pin Micro-Coaxial Harness, using AWG#44, 50Ω Micro-Coaxial Cable, with a length of 200mm, and a structure of 1-N; the cable end uses 20497-050T-30, with a Contact Pitch of 0.3mm. I-PEX officially provides a transmission speed of 5Gbps/lane NRZ (Reference Only) for CABLINE®-UA II, its listed USB reference application is USB 3.1 Gen 1 (5Gbps/lane), and USB 3.1 Gen 2 (10Gbps) is not listed as the corresponding official reference standard on this page.
The target data rate for USB 3.1 Gen 2 is up to 10Gbps, but whether high-speed signals can be transmitted stably is not solely determined by the name of the cable or the AWG specification. AWG#44 primarily reflects the conductor size and does not alone represent 10Gbps transmission capability; at the same time, it is also necessary to consider the characteristic impedance of the coaxial cable, insertion loss, return loss, crosstalk, connector performance, cable length, and PCB routing factors. For the 82445-100B-02-D, the drawings clearly specify the use of 50 AWG#44, 50Ω Micro-Coaxial Cable, with a length of 200mm, and both ends are structured with 50 pins, and the Pin Mapping is done in a 1-N manner. Therefore, if the project goal is USB 3.1 Gen 2, it is more reasonable for engineers to take **"10Gbps system link verification"** as the basis for judgment, rather than directly assuming that it meets 10Gbps upon seeing CABLINE®-UA II, AWG#44, or extremely thin coaxial cable.
From the specific 82445C0 drawing, the I-PEX 82445-100B-02-D is a 50P ultra-fine coaxial cable assembly, using AWG#44, 50Ω Micro-Coaxial Cable, finished length 200.0±5.0mm, with both ends using 20497-050T-30 Plug Housing and equipped with 2679-050-10 Metal Cover; the corresponding board-to-board connector is 20498-050E-41. The drawing also specifies requirements such as AC100V voltage withstand, insulation resistance above 50MΩ (DC100V), rated voltage of 30V, and Harness maximum operating temperature of 80°C. For engineers, when importing USB high-speed signals, it is important to verify the actual link's SI (Signal Integrity) indicators; for purchasers, it should be avoided to use only "50P, AWG44, 200mm" as the substitute procurement condition, but instead, check the connector part number, 0.3mm Pitch, wire material impedance, length, Pin Mapping, and specific electrical requirements to ensure that the substitute cable assembly matches the original scheme in both mechanical and electrical aspects.
If the actual design goal of the device is USB 3.1 Gen 2 10Gbps, it is recommended to first confirm that the controller, connector, PCB, cable assembly, and terminal device constitute a complete 10Gbps link, and then conduct SI tests such as insertion loss, return loss, crosstalk, and impedance on the cable assembly. The official documentation for CABLINE®-UA II provides single-ended and differential SI reports as well as Touchstone data, which can be used as references for high-speed link design and simulation. However, the official page clearly labels 5Gbps/lane as "Reference Only," so it is not recommended to directly promote the 82445-100B-02-D as "Official 10Gbps USB 3.1 Gen 2 Certified Cable Assembly." If the customer's original equipment uses this structure, we can carry out compatible development based on the original drawings. Our company can provide: I-PEX 82445-100B-02-D compatible alternative cable assembly solutions, focusing on alternative production around key specifications such as 50Pin, AWG#44, 50Ω, 200mm, 1-N, 0.3mm Pitch, and 20497-050T-30, and can further cooperate with the customer's specific high-speed application needs for sample verification and performance confirmation.
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