Categorization：Harness Component
In laptops, display modules, visual devices, and other space-limited electronic products, connector size, wire diameter, and high-speed signal transmission often need to be satisfied simultaneously. Therefore, the compatibility design of ultra-fine coaxial cable assemblies cannot only focus on "whether it can be plugged in," but also on complete specifications such as mechanical dimensions, electrical performance, and wire sequence. The I-PEX CABLINE®-CAL uses a 0.4mm pitch and horizontal plug-in structure, with a mating height of 0.73±0.07mm. Official data shows that both 30Pin and 40Pin are available, and it supports AWG38, AWG40, AWG42, and AWG44 Micro-Coax. This article introduces the I-PEX 82874-100B-02-D, which belongs to the CABLINE®-CAL 30Pin ultra-fine coaxial cable assembly, using AWG#40 Micro-Coax, 50Ω, blue wire, a length of 300.0±5.0mm, and a 1-N reverse wire sequence. The connector Housing model used at the wire end is 20777-030T-01. For engineers, this combination considers both connector miniaturization and cable routing space; for purchasers, it is necessary to confirm the product part number, connector model, AWG specification, wire length, and wire sequence as a complete purchasing specification.
When performing ultra-fine coaxial cable connector compatibility design, the most common problem is to only confirm the number of pins and pitch, but ignore the connector structure and cable electrical definitions. Taking 82874-100B-02-D as an example, it corresponds to CABLINE®-CAL 30Pin, 40AWG, 300mm, 1-N structure, and the I-PEX official page also clearly lists this part number; therefore, the alternative design not only needs to match 30Pin, 0.4mm Pitch, and 20777-030T-01, but also confirm the connector's horizontal insertion direction, mating height, cable specification, impedance, wiring method, and actual pin assignment. Especially, this cable uses a 1-N reverse wiring sequence, not a common 1-1 straight-through structure, that is, one end's Pin30 corresponds to the other end's Pin1, Pin29 corresponds to Pin2, and so on. If the alternative product only achieves mechanical size compatibility but makes a mistake in the wiring sequence, it may result in the device failing to communicate normally. Therefore, engineers should verify the overall "connector mechanical match + cable specification + electrical parameters + wiring sequence" when carrying out compatibility development, and purchasing personnel should also avoid making supplier comparisons based solely on the connector appearance or pin count.
For the alternative development of I-PEX 82874-100B-02-D, connector compatibility is first reflected in the structural dimensions. According to the official data of CABLINE®-CAL, its connection direction is Horizontal, with a mating height of 0.73±0.07mm, depth of 5.5mm, and a maximum height of about 0.80mm after mating 40 pins, one of the design positioning is for low space applications. Secondly, it is the wire and electrical parameters. The 82874 engineering drawing uses 30 AWG#40, 50Ω Micro-Coax, with a rated voltage of 30V, withstand voltage AC250V, and insulation resistance of 50MΩ Min. @DC100V, the wire harness operating temperature is 80℃ Max.; while the CABLINE®-CAL connector series itself supports AWG38～AWG44 Micro-Coax, and the official rated current for AWG#40 is 0.3A/contact. It needs to be specially noted that the high-speed test reference conditions on the I-PEX product page are CABLINE®-CAL 30Pin, AWG#40, 45Ω, 100mm, GSSGSSG, which belong to the reference test conditions of the connector series and cannot be directly equivalent to the actual performance of the 300mm, 50Ω cable harness of this 82874 model. Therefore, when introducing alternative products, it is also necessary to combine actual wire length, impedance, and terminal equipment for signal integrity verification.
For engineering development and procurement alternatives, it is recommended to use the complete specifications of I-PEX 82874-100B-02-D as a benchmark, rather than simply seeking a "30Pin ultra-thin coaxial cable". The key is to confirm whether the CABLINE®-CAL structure, 20777-030T-01 cable end Housing, AWG#40 Micro-Coax, 50Ω, 300±5mm, 1-N reverse wiring sequence, and connector structure at both ends are consistent. At the same time, confirm the connector insertion height, cable routing, and bending space based on the actual installation space of the equipment. The official model information of I-PEX defines 82874-100B-02-D as "CABLINE-CAL harness 30pin micro-coaxial 40AWG L=300mm 1-N", and also provides other models with different lengths such as 100mm, 200mm, and 1-1 structure. Therefore, direct replacement between different material numbers cannot be made solely based on the pin count. Our company can provide: I-PEX 82874-100B-02-D compatible alternative cable solution, which can produce matching ultra-thin coaxial cable harnesses with 20777-030T-01, AWG#40, 30PIN/0.4MM Pitch, 300mm length, and 1-N wiring sequence according to customer project requirements, providing corresponding solutions for engineers to verify samples, design introduction, and procurement of domestic alternatives.
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