Terminal block is one of the key connectors for heavy duty applications

Terminal block is a simple, cheap and useful type of connector. It has a long history in transportation and industrial equipment. Terminal block is a simple, useful, cost-effective and key component in transportation application. Terminal block essentially connects two or more wires together and distributes power throughout the application. They are simple but powerful connectors that, in many cases, connect wires together without solder or other interconnects. For a long time, they have been used in high demand areas such as vehicles or heavy machinery. In these applications, they are often used to connect panels.

Terminal block is usually used for vehicle control panel and vehicle instrument panel. They usually handle higher levels of voltage than other types of connectors. The terminal block is regarded as the hub of power supply and grounding.

This type of connector is commonly used in electric vehicles. In contrast, busbars are used to transmit high current, for example in electric vehicle battery pack applications. Terminal block is often used in electric vehicle charging station.


Eaton's Bussman series double row terminal block is suitable for various electronic and electrical applications and designs

Eaton's Bussman dual terminal block is available in various sizes for 22-8awg wire meters with rated current of 30a and voltage of 600V.

As a wiring product, terminal block is designed for fast and simple connection. The most common is by stripping the insulation, winding the screw, and then fixing it to the terminal. The terminal box has input and output ports, and the wires can be inserted into the terminal box and then clamped in the terminal box. Another option is to solder or crimp the wires and connect them to the terminal block. The latter option is often seen in transport applications, although screw connections may still exist in some non essential equipment.

Generally speaking, the terminal block has two main purposes: to connect different circuits together and provide an electrical grounding for the circuit. Grounding provides a safe route for the circuit and reduces the risk of short circuit in the system and serious injury to operators. Connecting different circuits can be a time-consuming task, and terminal blocks make it easier. For the circuits that need to work under high power or high vibration conditions, the installation personnel may need to use different types of products, such as bus base, terminal block and power distributor.

Molex terminal block can be panel mounted or freely suspended.

Advantages and disadvantages of terminal block

The main advantage provided by terminal block is cost saving. Compared with other types of connectors, the terminal block is relatively cheap. In a way, they can also save time. The driver or operator is properly trained and has the right tools, and can even carry out small-scale maintenance of the equipment in the cab on the road.

On the other hand, the main disadvantage is that even the wire with good safety can be loosened from the terminal block in the presence of vibration or collision. Therefore, it is essential to test the connections before they are implemented to ensure that they can withstand the impact they face in a heavy operating environment. In addition, terminal blocks are usually not covered or sealed, which limits their internal application or requires them to be installed in sealed control panels or containment units (e.g., in lockers on work trucks).

When selecting terminal blocks, you must understand the application requirements and concerns, because most terminal blocks are optimized for specific purposes. They are not ideal solutions for all applications, but terminal blocks are ideal for fast and efficient connection and distribution.

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