1. Plug-in terminal
Pluggable terminal blocks have pitches of 3.5, 3.81, 5.0, 5.08, 7.5, 7.62 poles and 2-24 wires, which can be matched with PCB sockets fixed by screws. The terminal plug adopts side connection technology, which is characterized by screws The direction is perpendicular to the direction of wire entry.
2. Screw terminal
It is one of the mainstream printed circuit board terminal technologies. It has the advantages of compact structure, reliable connection, firm and reliable shell, and accurate pitch, which can ensure reliable PCB wiring and large capacity. The solder leg and clamp body are divided into two parts to ensure that the solder joint will not be touched and damaged when the screw is tightened.
3. Spring type terminal block
The spring type terminals provide 2.54mm, 3.50mm, 5.00mm, 7.50mm, 7.62mm and other spacings. PCB single-core wires can be inserted directly without assistance. There is no button specification, and the wires can be easily taken out during the withdrawal process. Spring terminal blocks are often used in communication systems, lighting systems and monitoring systems. There are various wiring directions, suitable for high-density wiring requirements.
4. Barrier terminal
The code of barrier type terminal is LW, the middle pin code is C, the side pin code is B, the fixed code is M, the looper type code is R, and the welding type code is Q. And other advantages, the wire diameter ranges from 0.5mm to 6mm.
Quality identification method of PCB terminal blocks:
1. The difference in appearance: there is one or several iron die-casting lines on the appearance of the terminal block, which is a protruding line
2. The difference in weight: the copper in the terminal is heavier than the zinc
3. The difference in color: after the electroplating layer on the surface of the terminal is cut, the golden yellow color that appears is copper, and the white one is zinc
The above are the types and quality identification methods of PCB circuit board terminals. I hope to provide you with some references!
