Categorization：Harness Component
In notebook computers, tablets, high-resolution display devices, VR/AR devices, and high-speed data terminals, the internal connection space is becoming increasingly compact, while signal rates are constantly rising. This puts higher requirements on the size of the cable harness, signal integrity, and electromagnetic interference (EMI) resistance. The ultra-fine coaxial cable harness introduced this time, I-PEX 82995-100B-01-D, belongs to the CABLINE®-CA II Plus 60Pin Harness product solution. It adopts a high-density multi-channel connection approach and is suitable for devices that have high requirements for space utilization, high-speed signal transmission, and EMI control. The cable harness is paired with the I-PEX 20680-060T-01 connector at the cable end, which is compatible with AWG#40 ultra-fine coaxial wire. For engineers, the core value of such solutions lies not only in the "sufficiently thin wire diameter" but also in how to achieve stable impedance control, signal isolation, EMI suppression, and reliable connection simultaneously within limited space.
Ultra-fine coaxial cables are typically composed of a central conductor, insulating layer, shielding layer, and an external protective layer, among which the shielding layer is a crucial structure affecting the quality of high-speed signal transmission. Its basic function can be understood as forming an electromagnetic isolation barrier around the signal conductor: on the one hand, it can reduce the possibility of external electromagnetic noise coupling into the internal signal conductor, and on the other hand, it can also reduce the electromagnetic radiation generated by the high-speed signal itself to the surrounding space. When multiple high-speed signals are concentrated in a narrow electronic device, cross-talk is likely to occur between different channels, and nearby wireless communication modules, power circuits, and high-speed digital circuits may also become interference sources. Therefore, a good shielding structure is helpful to maintain signal integrity. For the I-PEX CABLINE®-CA II series solutions, the connectors adopt ZenShield® full EMI shielding and multi-point grounding design, which can form a more complete EMI control path with the shielding structure of the ultra-fine coaxial cable bundle. It should be noted that the shielding layer is not simply "the thicker, the better," and the actual design needs to comprehensively consider factors such as shielding continuity, grounding method, impedance control, bending performance, and connector shielding structure.
For high-speed harness design, the key parameters of I-PEX 82995-100B-01-D need to be considered together with the overall PCB layout, signal rate, and connector scheme. The cable end connector used in this scheme is 20680-060T-01, which corresponds to 60Pin high-density connection requirements and is compatible with AWG#40 ultra-thin coaxial cable. The CABLINE®-CA II series adopts a 0.4mm pitch, horizontal insertion and extraction, and low-profile design, emphasizing high-speed transmission, full EMI shielding, and mechanical locking features, making it suitable for equipment with limited internal space and multi-channel high-speed signal transmission requirements. For engineers, when making actual selections, it is not enough to just look at the "AWG#40" item, but should further confirm the cable characteristic impedance, transmission speed, length, bend path, termination process, and connector compatibility. Particularly in high-speed signal applications, the overall matching of cables, terminals, shielding layers, and connectors is often more important than a single parameter.
In procurement or domestic substitution projects, if the original design uses I-PEX 82995-100B-01-D, it is recommended that engineers and purchasers first check the product part number, Pin count, wire length, wire specifications, and both-end connection methods. Then confirm whether the line end connector is 20680-060T-01 and whether the wire material is AWG#40. For substitute cable assemblies, compatibility cannot be solely judged based on "外观相同" (外观 same) or "connectors can be inserted." It is also necessary to focus on verifying terminal arrangement, wire sequence, impedance, attenuation, crosstalk, shielding continuity, insertion and removal reliability, and high-speed signal integrity. Our company can provide I-PEX 82995-100B-01-D compatible substitute cable assembly solutions, which can be developed around the 20680-060T-01 connector and AWG#40 ultra-fine coaxial cable material. We can match the cable assembly scheme according to the actual wire length, Pin position, wire sequence, routing direction, and internal space requirements of the equipment, providing engineers with ultra-fine coaxial cable assembly manufacturing support from sample verification to mass production. For purchasers, it is also possible to optimize the supply chain and evaluate domestic substitution by using compatible substitution solutions as a direction, while meeting the original interface and electrical performance requirements.
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