Screw in Terminal Block
Products Description
Screw in Terminal Blocks are devices that achieve electrical connections by clamping conductors together with screws. They are widely used in power distribution systems, control cabinets, power supply equipment, energy storage systems, motor control, elevator equipment, rail transportation, and many other applications.
Their core value lies in their robust connections, high durability, wide adaptability, and convenient maintenance. They maintain stable electrical performance even in industrial environments with high loads, high vibrations, and extreme temperature variations.
We offer a variety of designs, from single-layer, double-layer, and multi-layer structures to plug-in, DIN rail, and vertical/horizontal types. Customization is available to suit specific system layouts and terminal arrangements, ensuring a perfect fit for on-site engineering needs.
Technical Features: Engineering Wisdom of Pressure Self-Balancing Mechanism
Pressure Compensation Principle
The elastic polymer undergoes micro-elastic deformation during vibration, dispersing impact energy across the entire contact surface.
Force Distribution Optimisation
The annular pressure chamber enables the clamp screw pressure to be distributed in a "surface" manner (not the "line" distribution of traditional point contact), reducing local stress concentration.
Self-Healing Microcirculation
The surface coating (0.5μm environmentally friendly nickel) forms a self-healing oxide film during micro-motion, maintaining contact activity.
Temperature Expansion Synergy
The thermal expansion coefficients of the copper alloy and the elastomer (16.5×10⁻⁶/℃ vs 12.3×10⁻⁶/℃) are precisely matched, achieving constant pressure under temperature fluctuations.
Detailed Demonstration – The Truth Revealed in the Microscopic Surface
Microscopic Witness of the Contact Interface
Under an electron microscope, a regular array of microscopic protrusions formed after precise texturing of the wire clamp contact surface can be observed. After crimping with a new conductor, these protrusions are embedded in the conductor strands, forming a large-area, low-resistance metal-metal contact, while the conductor deforms uniformly without any cutting-like damage.
Proof of Material Cross-Section Uniformity
Through the mirror-polished cross-section of the insulating shell, a uniform fiber distribution of the glass fiber reinforcement material can be seen, without agglomeration or disordered orientation. Metallographic analysis of the metal screw terminal blocks shows that the dense, streamlined fiber structure formed by the cold forging process explains the source of its high strength.
Simulation Visualization of Stress Distribution
Computer simulation color images clearly show that after the Block Terminals are tightened, the stress is effectively guided and evenly distributed in the annular clamping area of the wire clamp and the reinforcing rib network of the insulator, avoiding stress concentration at weak points in the insulation or sharp metal corners.
Application Scope: As the cornerstone, supporting the operation of modern industry
Industrial Automation and Control
In the I/O wiring of PLCs, frequency converters, and servo drives, our Ground Terminal Block ensures the accurate transmission of control signals.
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Power Distribution and Energy Management
In distribution boxes, meters, and inverters, our high-current-carrying capacity terminal screw block guarantees the safe distribution of electrical energy.
02
Building Automation and Security
In HVAC, lighting control, and security systems, our reliable terminals ensure the long-term stable operation of building facilities.
03
Rail Transportation and Shipbuilding
In these fields with extremely demanding requirements for vibration and shock resistance, our highly vibration-resistant Block Terminal Electricals provide lifeline-level connection protection.
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