Optimizing Power Density via Intermediate Modular Connector Interfaces

The development of Size 4 connector components addresses a specific mechanical constraint in industrial design by providing a physical footprint situated between the compact 3A and the larger 6B standards. This intermediary sizing allows for high-amperage transmission in space-constrained applications within the mechanical engineering, robotics, and energy sectors.

Bridging Functional Gaps in Electrical Infrastructure
In the design of modern industrial equipment, engineers often face a choice between the Han 3A, which is limited to a maximum current of 40 A, and the larger Han 6B. The Size 4 series provides a solution for requirements that exceed 40 A but cannot accommodate the dimensions of a 6B housing. By utilizing this intermediate size, designers achieve a reduction in installation space of up to 40% compared to the next larger standard size.

This spatial optimization is critical for the digital supply chain of hardware components, where reducing the volume of peripheral infrastructure — such as connectors and cabling — allows for more significant allocation of space to active systems like cooling, ventilation, or high-density electronics.

Technical Performance and Energy Efficiency
The technical relevance of the Size 4 series is evidenced by its capacity to carry 70 A contacts. Beyond mere capacity, these interfaces contribute to energy efficiency through the implementation of silver-plated power contacts. These contacts exhibit lower impedance compared to standard CEE plugs, which can result in energy losses being reduced by as much as 50% during transmission.

The hardware is designed for deployment in harsh industrial environments, supporting critical components such as frequency converters and high-performance drives. For specialized configurations, adapters enable the integration of more than 100 different modular inserts, ensuring that the technology remains compatible with existing cross-industry standards for power, signal, and data.

Enhancing Connectivity in Automation and Transportation
In the sectors of energy and transportation, the demand for higher power density is driven by the increasing electrification of subsystems. Size 4 components facilitate this by maintaining high current throughput without the bulk of traditional housings. Furthermore, the inclusion of push-in termination technology for PE conductors allows for tool-less installation, reducing assembly time and potential points of failure in the field.

By optimizing material consumption while maintaining technical functionality, these connectors support sustainable manufacturing practices. The ability to scale connections through a modular design ensures that the infrastructure can adapt to evolving technical requirements in automation and power transmission.

Edited by Evgeny Churilov, Induportals Media - Adapted by AI.

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