The key to high-frequency high-speed transmission: I-PEX 20454-230T ultra-thin coaxial cable束 testing and performance standards

In consumer electronics, medical equipment, vehicle displays, and high-end laptops and tablets, micro coaxial cable (micro coaxial cable) is an ideal wire material for high-frequency and high-speed transmission due to its excellent signal integrity, lightweight, and high flexibility. To ensure the stability of signal transmission, the matching test of the harness and connector is crucial. This article takes the I-PEX 20454-230T connector as an example to introduce the common test items and evaluation criteria for micro coaxial cable harnesses.

One, common test items for ultra-fine coaxial cable束
Before shipment or assembly, the extremely fine coaxial cable bundles must undergo a variety of electrical and mechanical performance tests to ensure stable and reliable product performance. The conventional test items are as follows:
Appearance detection
Check the soldering condition of the connector grounding part, whether the insulating sheath is damaged, and whether the wire sequence is correct.
Appearance should be free of scratches, dents, and dirt; the solder joints between the iron shell and the grounding plate should be full and without cold solder joints.
2. Continuity Test
Confirm that there is no open circuit, short circuit, or misalignment.
Judging criteria: The conductive resistance value meets the design requirements and there is no short-circuit phenomenon.
Voltage Withstand Test (Hi-pot Test)
Apply voltage higher than normal operating voltage to the harness to verify insulation performance.
Judgment criteria: No puncturing or leakage, leakage current ≤ set value.
Contact Resistance Test
Check the contact resistance between the test terminal and the socket to ensure stable signal transmission.
Judgment criteria: Contact resistance ≤ standard value (e.g., I-PEX 20454-230T ≤ 50 mΩ).
Insertion and extraction force test
Check whether the insertion force and withdrawal force of the connector are within a reasonable range.
Judgment criteria: insertion force ≤ 80 N, withdrawal force ≥ 10 N (specific values to be referred to the specifications).

Introduction to I-PEX 20454-230T connector
• Series Belonging: Belongs to the "plug housing" in the I-PEX CABLINE®-VS series, usually used with the 20453 series plug and the 20455 series socket.
• Pitch: 0.5 mm, suitable for high-density wiring applications.
•  Number of pins: Provides 20, 30, 40, 50 pin versions, among which the 20454-230T is a 30 pin插座 housing structure.
Cable Application: Compatible with 36 AWG and above micro coaxial cable (50 Ω impedance).
Performance features: Support up to 20 Gbps high-speed data transmission in single channel, compatible with USB4 Gen 3, eDP, PCIe Gen 3/4 and other standards.
 Typical Applications: Widely used in high-definition display modules (eDP/HDR), laptops, tablets, automotive displays, camera modules, VR devices, drones, medical terminals, and data center equipment.

With the continuous development of electronic devices towards high-definition, thinness, and high bandwidth, the reliability of extremely thin coaxial cables and their connectors has become the core guarantee of system performance. Through standardized testing procedures and strict judgment criteria, the stability and consistency of the cables in complex environments can be effectively improved.
As a widely adopted representative model, the I-PEX 20454-230T has become the preferred connection solution for many high-end equipment brands with its excellent electrical performance and mature structural design.
We have been focusing on the design and customization of high-speed signal cable harnesses and ultra-fine coaxial cable harnesses for a long time, committed to providing stable and reliable high-speed interconnect solutions. If you have any related needs or would like to learn more, please contact: Manager Zhang.18913228573（WeChat number）。