SEFCX-18

Barrier blocks, at their most basic, are used to create a barrier between two opposite current paths in a circuit. This can be used to ensure that the current does not move from one side to the other, thereby avoiding short-circuits or other hazardous situations. One of the most widely used types of barrier blocks is SEFCX-18, which is an insulated, interlocking model. To understand this terminal block’s application field and working principle, we must first look at the key characteristics and components of it.

Key Characteristics

The SEFCX-18 barrier block is made of thermoplastic material and is rated at 500 Volts. It is a 18mm terminal block with a insertion width of 8.7mm, a rated current of 10A and a tightening torque of 0.6Nm. It holds multiple insulation levels, most notably double insulation which is important for noise prevention. The terminals offer a secure and reliable connection due to their positive locking mechanism and feature an angled ledge for easy cable tagging. Furthermore, the polyamide housed in this barrier block is anti-corrosion and offers UV resistance.

Components

This barrier block includes three key components, which are the cover, body and end plate. The cover is used to seal and protect the terminal and the body and end plate make up the terminal block itself. The body contains two insulation layers, which are connected by a steel clip. This steel clip ensures that the current stays in the body and does not flow to the end plate, effectively creating a barrier. Inside the body, an internal connection is secured via screws. All three components are then connected together with a power plug.

Application Field

The SEFCX-18, with its double insulation, is predominantly used in applications where high levels of electrical noise are present. This includes industrial applications such as automated production lines, where large quantities of electrical noise is generated by moving parts or changes in voltage. The SEFCX-18 is also suitable for harsh outdoor environments such as wet or humid environments where the equipment needs to be protected from corrosion.

Working Principle

The working principle of the SEFCX-18 terminal block is quite simple. When the power plug is inserted into the block, the two insulations in the body create a barrier between the two current paths. This prevents any current from flowing from one side to the other, which would potentially create a short-circuit. The steel clip in the middle of the body ensures that the barrier is maintained even when the power plug is disconnected.

The SEFCX-18 is a versatile and reliable terminal block that is suitable for a wide range of applications. Its simple yet secure design ensures that it is reliable and long-lasting, making it the ideal choice for any circuit that needs a high degree of electrical noise or isolation.