With the rapid development of electronic technology, the needle bar is also a common electronic component in the current electronic market. Its working principle is to connect and transmit signals between components and equipment, and keep the signal distortion and energy loss from changing between equipment systems. For those who have just come into contact with, for example, what are the performance characteristics and operation precautions of the needle array, and they may not have a good understanding of these knowledge points. The following section will explain the performance features of the needle arrangement and what matters should be paid attention to in operation.

1. The convenience of operation and the mechanical strength of needle arrangement are also important factors. The connector is usually the interface for communication between PCB motherboard and external components. The bearing force of the needle bar is very strong, sometimes it may encounter considerable external force, and it is also intact.

2. The reliability of components assembled by through-hole technology is much higher than that of SMT components. Whether it is a strong pull, extrusion or thermal shock, it can withstand, but not easy to leave the PCB.

3. The processing of needle and bus bar for industrial field wiring is usually a high-power component, which can meet the needs of different transmission of high voltage and high current.

4. These advantages weaken with the decrease of component adhesion on PCB. The feature of the pin arrangement is that it is compact in design and easy to mount. It is obviously different from that of through-hole in size and assembly form.

5. With electrical strength, it refers to the ability to withstand the rated test voltage between pins, contacts, or between contacts and shell.

6. Generally, the needle bar can adapt to the attenuation caused by electromagnetic interference and the ability of shielding electromagnetic interference.

7. The contact resistance of the pins should be small, ranging from tens of milliohm.

1. Heat dissipation design: the needle bar will heat up when it is working. Too high temperature will affect the attenuation speed and stability of LED. Therefore, the heat dissipation of PCB board and the ventilation and heat dissipation of box will affect the exhaust of needle bar.

2. Check whether the anti-static discharge needle is provided with good anti-static measures.

3. When the current value of the needle bar is 20 mA, it is generally recommended that the maximum current should not exceed 80% of the nominal value, especially for the electronic equipment with small point spacing, the current value should be reduced due to poor heat dissipation conditions.

4. To control the perpendicularity of the board, it is necessary to have sufficient technology to ensure that the LED is perpendicular to the PCB board when passing through the furnace.

5. The temperature and time of wave front welding must be strictly controlled. The preheating temperature should be 100 ℃± 5 ℃, and the maximum temperature should not exceed 120 ℃. The welding temperature should be 245 ℃± 5 ℃, and the welding time should not exceed 3 seconds.