I-PEX 20373 ultra-fine coaxial connector welding guide: The key to improving high-speed interconnect stability

In the context of continuously upgraded smart devices and the continuous increase in signal transmission speed, ultra-fine coaxial connectors have become the core components in high-frequency and high-speed applications. As an excellent miniature coaxial connector, I-PEX 20373-R30T-06 is widely used in portable terminals, wireless communication modules, and other fields. To ensure connection stability, the welding quality of ultra-fine coaxial cable assemblies is crucial. This article will explore four aspects: cable fundamentals, connector features, welding techniques, and precautions, to help engineers better master high-quality welding processes.

 

---

What is a superfine coaxial beam?

Extremely thin coaxial cable束 (micro coaxial cable) is a type of coaxial cable with a precise structure and small diameter, usually only about 0.2mm to 1mm in diameter. It consists of a central conductor, an insulating layer, a shielding layer, and an outer sheath, and has characteristics such as low loss, high anti-interference, and good flexibility. Due to its reliable high-speed signal transmission performance, it is widely used in compact electronic products such as smartphones, camera modules, display equipment, and wearable terminals.


 

---

Introduction to I-PEX 20373-R30T-06 connector

I-PEX 20373-R30T-06 belongs to the I-PEX CABLINE®-SS series, which is a very fine coaxial connector specially designed for high-density and high-speed signal transmission. Its core features include:

Contact spacing: 0.4mm
2. Composite height: 1.65mm (up to 1.85mm)
3. Insertion and extraction method: vertical insertion, horizontal output
4, Compatible cable: ultra-fine coaxial cable with AWG #38～#46

5, Optional PIN numbers: 10, 14, 20, 30, 32, 35, 40, 50, etc. 6, Application interface: Compatible with high-speed MIPI, eDP, USB, and other signal channels

Its miniaturized structure and excellent signal integrity make it one of the preferred miniature high-speed interconnect solutions for high-end equipment manufacturers.

---

Three, welding techniques for extremely thin coaxial cable bundles

Precision stripping wire

 Use a professional stripping device to strictly control the stripping length to ensure that the bare wire section matches the connector pad, and do not expose copper that is too long or too short.

Control welding temperature

 A temperature-controlled soldering iron is used, with the welding temperature stabilized at about 300°C, which ensures wettability while avoiding high temperature damage to conductors and insulating materials.

Shorten the heating time

Welding time should be controlled within 1 to 2 seconds to prevent wire material from shrinking or deforming due to heat accumulation.

Use appropriate solder and flux

Choose fine solder wire and high-quality flux to ensure that the solder joints are full and firm, reducing the risk of cold solder joints.

Cooperate with welding fixture

 Fix the harness with a dedicated positioning fixture to make the welding more stable, significantly reduce human errors, and improve consistency.

---

Four, welding precautions

① Avoid over-tensioning or bending the wire harness during the construction process to prevent internal conductor damage.

Maintain a clean welding environment, free of dust and oil stains, to avoid polluting the welding points.

After welding, clean the flux residue promptly to reduce corrosion and avoid poor conductivity later on.

It is recommended to conduct a microscopic magnification inspection, and X-ray detection if necessary, to ensure that there are no risks such as false soldering or short circuits.



The welding technology for extremely thin coaxial cable bundles has a direct impact on product performance. With methods such as precise stripping, reasonable temperature control, rapid welding, and auxiliary fixtures, the quality and reliability of the welding joints can be significantly improved. As a typical representative of miniature high-speed connectors, I-PEX 20373-R30T-06, when combined with professional processing technology, can achieve stable and low-loss high-speed signal transmission in scenarios such as intelligent terminals and communication equipment.

I amSuzhou Huichengyuan Electronic Technology Co., Ltd.Long-term focus on the design and customization of high-speed signal cable harnesses and ultra-fine coaxial cable harnesses, committed to providing stable and reliable high-speed interconnection solutions. If you have related needs or want to learn more, please contact:Manager Yin 18913280527 (WeChat number same)。