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

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

Part 1: Common Test Items for Ultra-Fine Coaxial Cable Assemblies
Before shipment or assembly, extremely fine coaxial cable bundles must undergo a variety of electrical and mechanical performance tests to ensure product stability and reliability. The routine test items are as follows:
Appearance detection
Check the soldering situation of the connector grounding part, whether the insulation sheath is damaged, and whether the wire sequence is correct.
Judging criteria: No scratches, no peeled skin, no dirt; the soldering points between the iron shell and the grounding plate should be full and without false welding.
2. Continuity Test
Confirm that there is no open circuit, short circuit, or misalignment.
Judgment criteria: The conduction resistance value meets the design requirements, and there is no short-circuit phenomenon.
3. Voltage Proof Test (Hi-pot Test)
Apply voltage higher than normal operating voltage to the wire harness to verify insulation performance.
Judging criteria: No puncturing or leakage, leakage current ≤ set value.
4. Contact Resistance Test
Test the contact resistance between the test terminal and the socket to ensure stable signal transmission.
Evaluation criteria: Contact resistance ≤ standard value (e.g., I-PEX 20454-230T ≤ 50 mΩ).
Insertion and extraction force test
Test whether the insertion force and withdrawal force of the connector are within a reasonable range.
Judging criteria: Insertion force ≤ 80 N, withdrawal force ≥ 10 N (specific values are subject to the specifications).

I-PEX 20454-230T connector introduction
• 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.
 Contact spacing (Pitch): 0.5 mm, suitable for high-density wiring scenarios.
• 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 characteristics: Supports up to 20 Gbps high-speed data transmission in single channel, compatible with USB4 Gen 3, eDP, PCIe Gen 3/4 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 ultra-fine coaxial cable assemblies and their connectors has become the core guarantee for system performance. Through standardized testing processes and strict judgment criteria, the stability and consistency of the cable assemblies 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 want to learn more, please contact: Manager Yin.18913280527 (WeChat number)。