In the manufacturing of Din rail terminal blocks, the choice of hardware materials significantly impacts product performance. Among the commonly used materials, brass, red copper, and steel each have unique characteristics that influence the functionality of screw type and spring type terminal blocks.
Electrical Conductivity
Red copper, known for its outstanding electrical conductivity, is the top choice when minimizing electrical resistance is crucial. In high – current applications, red copper – made terminal blocks can efficiently conduct electricity, reducing power losses and heat generation. For example, in power distribution systems with large – current transmission, red copper screw type terminal blocks ensure stable and reliable electrical connections.
Brass, an alloy of copper and zinc, has lower electrical conductivity compared to red copper. However, it still offers decent conductivity for many general – purpose electrical applications. It is often used in terminal blocks for household electrical appliances or low – to – medium current industrial control circuits.
Steel, on the other hand, has relatively poor electrical conductivity. Using steel in terminal blocks for electrical connection purposes would lead to high resistance, excessive heat generation, and potential connection failures, so it is rarely used for direct electrical conduction in standard terminal block designs.
Mechanical Properties
Steel has excellent mechanical strength and hardness. This makes it suitable for applications where the terminal block needs to withstand significant mechanical stress. For instance, in some harsh industrial environments, steel – reinforced spring type terminal blocks can maintain their structural integrity when subject to vibrations, impacts, or high – torque fastening.
Brass also has good mechanical properties, including moderate strength and good malleability. It can be easily formed into various shapes during the manufacturing process of terminal blocks. This malleability allows for the creation of complex terminal block designs, such as those with precisely shaped screw – tightening mechanisms in screw type terminal blocks.
Red copper, while having good electrical properties, is relatively soft compared to brass and steel. In applications where high mechanical stress is present, red copper terminal blocks may be more prone to deformation. However, this softness can also be an advantage in achieving a good electrical contact seal when properly designed.
Corrosion Resistance
Brass has better corrosion resistance than red copper due to the presence of zinc in its composition. In humid or corrosive environments, brass – made terminal blocks can resist oxidation and corrosion for a longer time. This makes brass a preferred choice for terminal blocks used in outdoor electrical equipment or in areas with high humidity.
Red copper, although it can form a protective oxide layer over time, is more susceptible to corrosion in certain acidic or alkaline environments. Special coatings or treatments are often required to enhance its corrosion resistance when used in harsh conditions.
Steel is highly susceptible to corrosion, especially in the presence of moisture and oxygen. Without proper anti – corrosion measures like galvanization or painting, steel terminal blocks would quickly rust and degrade, leading to poor electrical connections and reduced mechanical strength.
In summary, when choosing materials for Din rail terminal blocks, red copper is ideal for high – conductivity requirements, brass offers a balance between electrical and mechanical properties along with good corrosion resistance for general applications, and steel is mainly used when high mechanical strength is the primary concern, often with additional anti – corrosion treatments.
Post time: Mar-07-2025