According to data from Bishop & Associates, the global market size for industrial control connectors was approximately US$7.722 billion in 2020, achieving a compound annual growth rate of approximately 4.03% from 2010 to 2020. This growth is attributed to the accelerated development of industrial automation and intelligentization by major industrialized countries such as the United States and Germany, coupled with the active participation of some developing countries in the global industrial restructuring, absorbing industrial and capital transfers, and leveraging their late-mover advantage to rapidly expand their scale. All of these factors directly benefit the growth in demand for industrial control connectors.
Compared to other types of connectors, the industrial control field has higher requirements for the comprehensive mechanical, electrical, and environmental performance of connectors.
Compared to other types of connectors, industrial control connectors are widely applicable to industrial production, especially for connection needs in harsh and complex environments, which places higher demands on the overall mechanical, electrical, and environmental performance of the connectors.
(1) Environmental adaptability
The complexity of the working environment for connectors in the industrial control field (e.g., dirt, dust, temperature, humidity, and mechanical vibration and shock can all interfere with typical connections).
Therefore, the environmental adaptability of connectors must be considered during the design phase, including the housing, structure, materials of key contacts, plating materials and thickness. (For example, the sealing rating must meet IP67 or IP68 standards, and the product lifespan and corrosion resistance must meet international EIA industrial application standards.)
This requires connector manufacturers to have strong customization capabilities in design. At the same time, as downstream application scenarios continue to expand, the reliability requirements for connectors will also increase further.
(2) Narrow pitch, integration
As electronic devices become increasingly sophisticated and the control functions and complexity of various electronic systems continue to grow, corresponding connector products need to achieve narrower pitch and higher integration while maintaining stability.
For example, the standard board-to-board connectors for industrial control equipment have gradually transitioned from 2.54mm, 2.0mm, and 1.27mm pitch to 0.8mm, 0.635mm, and 0.3mm pitch. At the same time, wire-to-board I/O connectors also show a clear trend towards narrower pitch. The latest miniature I/O connectors are smaller and more stable than standard I/O connectors.
Simultaneously, with the widespread application of signal parallel transmission technologies such as multiplexing, there is a growing need to integrate more and more signals, including electrical, microwave, and optical signals, into a single connector, achieving independent transmission and preventing interference between signals. This makes connector integration an inevitable trend. For example, the number of pins in a single connector continues to increase, signal transmission channels become richer, and the functions that can be achieved become more diverse. This also requires connector manufacturers to possess strong precision machining capabilities and to operate meticulously in processes such as molding and welding to achieve narrower pitches, thereby realizing higher integration levels.
(3) High speed and high frequency
Currently, mainstream industrial control connectors achieve transmission rates of 3Gbps and above, and are gradually moving towards 40Gbps and above. The increased bandwidth required for data transmission is also driving up the upper limit of signal frequencies. Connectors are prone to electromagnetic interference when transmitting signals at higher speeds and frequencies, thus requiring connector manufacturers to utilize electromagnetic simulation software for evaluation in product design and to achieve higher precision standards in manufacturing.
