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Terminal Blocks - Specialized

Terminal blocks are electrical components used to simplify circuit wiring. They come in a variety of types, including 1173, 7900, and 9900 models, each with its own specialized application field and working principle. By understanding the different types and their functions, users can better determine which type of terminal blocks best suits their project.

1173 Terminal Blocks:

1173 terminal blocks are, in effect, miniature circuit breakers. Though they come in a variety of shapes, sizes, and voltage ratings, they all serve the same purpose: to safely connect and disconnect circuits. 1173 terminal blocks act as a switch; when the circuit is open, they break the connection, and when the circuit is complete, they make the connection. They can be used with current or voltage ratings up to 25A, 600V AC. Some models also have additional features such as surge protection, or the ability to accommodate special cables.

7900 Terminal Blocks:

7900 terminal blocks are multi-level components that come in both caged and fixed types. Caged ones allow the user to connect multiple circuits at each level, while fixed ones only allow a single connection. With 7900 terminal blocks, users can connect up to five levels of circuits in a single unit, making them ideal for larger projects. Additionally, they are suitable for heavier-duty applications, with a current rating of up to 250A and voltage ratings up to 1,000V AC.

9900 Terminal Blocks:

9900 terminal blocks are best for applications where power needs to be distributed in an efficient manner. They are designed to have a higher current rating than the other two types, and a higher voltage rating. The maximum current rating for 9900 terminal blocks can be up to 350A and the maximum voltage rating up to 1,500V AC. These blocks are also more compact than the 7900 and 1173 models, making them ideal for applications where space is limited.

Conclusion

Terminal blocks come in a variety of models, each with its own specialized application field and working principle. Knowing the difference between these types and their features helps users to determine which type is best for their project.

1173, 7900, and 9900 terminal blocks all offer safety and convenience when connecting and disconnecting circuits, but depending on the size and purpose of the project, one type may be more suitable than another. Whether for small DIY projects or for complex industrial applications, terminal blocks remain one of the most reliable and versatile electrical components available.

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