Overview of PCB terminal block

1, overview:

The first terminal of the world began with Feinikesi electric, then each big manufacturer through innovation gradually improve connectivity products; Wanke is the invention of the first leaf spring type wiring terminal, the terminal more convenient connection, quick to win the trust of the market; in the end sub industry development situation, non stripping terminal products or will become the development trend of the industry after the. PCB terminals in recent years for innovative products, and wide application range, easy to use.

2, basic characteristics:

This kind of accessories products are mainly used in electrical connection, the common advantages: 1, security; 2, convenient and quick connection; 3, beautiful.

3, terminal:

Usually made of plastic, hardware, screws. Terminal of plastic material is generally PA66, PBT, the advantages of PA66 materials is the stability of its excellent, but the drawback is that the water is too strong, easy to cause the product size change; hardware consists of copper, aluminum, iron consisting of three materials, copper common application has 95% copper, phosphor bronze and brass (75% brass can be divided into the copper alloy, copper, brass) specifications; screws are made of iron, steel and stainless steel. (disadvantages of common iron screw for the current is too large to heating lead to the occurrence of safety accidents)

4, terminal manufacturers:

The common market in two, scale manufacturers and small manufacturers, of which only 20% are formal enterprises, by virtue of its complete certification, excellent products, perfect service system occupied most of the market quickly, other manufacturers is derived from the cost profit considerations, do not pay attention to the quality of the products, add back material caused changes to the product performance, and the materials used are impure, malignant smell.

5, terminal structure: (here focuses on PCB terminal)

PCB terminals the biggest characteristics is a welding needle, in a sense, only with solder pin terminals can become PCB terminal. The following classification to be introduced:

1, the functional classification: single, double, three layer;

2, the angle classification: right, bending angle, angle (45 °, 135 °);

3, function application: plug-in type, direct welding type, fence, spring type;

4, screw angle: lift, retaining line type, screw type, spring type (return type and overlapping type)

6, the terminal spacing:

Common interval: 2.5, 2.54, 3.5, 3.81, 3.96, 5, 5.08, 7.5, 7.62, 8.25, 8.5, 9.5 (9.52), 10, 10.16, 11, 12.7, 13 (11.11)