Categorization：Harness Component
Today, with laptops, tablets, high-resolution display devices, VR/AR devices, and high-speed data terminals constantly developing towards thinness and high speed, traditional cables are increasingly difficult to meet the requirements of space, signal integrity, and EMI control simultaneously. The I-PEX 81462-100B-02-D is a 40Pin ultra-thin coaxial cable assembly from the CABLINE®-CA II series, using AWG#40, 50Ω Micro-Coaxial Cable, with a standard length of 200mm. The mating cable connector model is 20680-040T-01. This solution is based on the CABLINE®-CA II connector platform with a 0.4mm Pitch, featuring compactness, high density, and high-speed signal transmission. For engineers, its value lies not only in saving internal wiring space within the equipment but also in achieving a more controllable high-speed signal transmission environment through the ultra-thin coaxial structure; for purchasers, it allows for more accurate material confirmation and supplier selection by starting from clear key parameters such as Pin count, wire gauge, length, and connector material number.
Engineers often focus on a question when selecting ultra-fine coaxial cables: What is the maximum current that ultra-fine coaxial cables can withstand? The answer is not a fixed number but is closely related to wire diameter, conductor structure, Pin quantity, thermal conditions, and specific connector configurations. According to the official information of CABLINE®-CA II, different cable specifications correspond to different rated current capacities, where Micro-Coaxial Cable's AWG#44 is about 0.1A/contact, AWG#42 is about 0.24A/contact, AWG#40 is about 0.3A/contact, AWG#38 is about 0.5A/contact, and AWG#36 is about 0.8A/contact; while the AWG#34 discrete wire scheme can reach about 1.0A/contact. Therefore, for the ultra-fine coaxial cable with AWG#40 used in this product, 0.3A/contact can be taken as the rated current reference value for the corresponding connector platform. However, this does not mean that the entire 40Pin cable assembly can simply carry 12A by calculating 0.3A×40. Ultra-fine coaxial cable assemblies are mainly aimed at high-speed signal interconnects, and the actual allowable current needs to be verified through engineering based on specific circuit applications, continuous operating conditions, environmental temperature, cable bundling methods, and connector rated conditions. In other words, "the maximum current that ultra-fine coaxial cables can withstand" should be understood as the rated capacity under single Contact and specific cable material conditions, and cannot be directly equated to the long-term safe current carrying capacity of the entire cable assembly.
For high-speed equipment design, the core indicator of the harness is not simply to pursue current-carrying capacity, but to control the loss, impedance change, crosstalk, and EMI influence of high-speed signals during transmission. 81462-100B-02-D uses AWG#40 Micro-Coaxial Cable, with 50Ω characteristic impedance as an important design parameter. Both ends use CABLINE®-CA II series connector structures, with the wire end connector model being 20680-040T-01. The CABLINE®-CA II platform employs a 0.4mm contact spacing, horizontal insertion and extraction, and ZenShield® full EMI shielding structure, enhancing the stability of high-speed interconnections through multi-point grounding and mechanical lock design. For engineers involved in high-speed display, data transmission, or high-density internal connection design, this extremely fine coaxial solution can achieve multi-channel signal wiring within limited equipment space, while reducing the crosstalk and EMI control pressure that traditional wiring may face in high-speed applications. For purchasers, when evaluating alternative suppliers, it is essential to check the matching relationship between 40Pin, AWG#40, 50Ω, 200mm, connector 20680-040T-01, and corresponding CABLINE®-CA II interface, rather than judging product compatibility solely based on appearance size or Pin count.
For projects that need to replace the original I-PEX cables, engineers and purchasers are advised to first confirm the actual connector interface, Pin count, Pin assignment, cable length, and routing direction at the equipment end. Then further confirm the cable specification and high-speed performance requirements. The key identification information for this product is: I-PEX 81462-100B-02-D, 40Pin, AWG#40, 200mm, 50Ω Micro-Coaxial Cable, as well as the cable end connector 20680-040T-01. If the project originally used the I-PEX CABLINE®-CA II platform, then during the development of the replacement product, it is also necessary to focus on verifying indicators such as connector mating size, latch structure, terminal bonding, shielding grounding, conductivity performance, voltage resistance, insulation resistance, and high-speed signal integrity. It should be particularly noted that the high-speed capability of the connector platform is not entirely equivalent to the final transmission performance of the specific cable component in the actual equipment, so it is recommended to conduct tests such as insertion loss, return loss, crosstalk, impedance consistency, and reliability before mass introduction. Our company can provide: I-PEX 81462-100B-02-D compatible replacement cable solutions, which can develop extremely fine coaxial cable solutions according to the actual equipment structure, cable length, Pin count, cable specification, and connector matching requirements. We provide sample verification and mass production introduction support for engineers, and also provide domestic replacement supply chain options for purchasers.
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