In almost all electronic and electrical products, connectors have become a necessary element for connecting components. Connectors exist not only to disassemble, but also to provide current and signal carriers for products.

In the process of using connectors, many electronic system designers have had similar experiences: using cheap connectors, and finally paying a high price, even regretting. The incorrect selection and use of connectors can result in system failure, product recall, product liability cases, circuit board damage, rework and maintenance, and subsequently lead to sales and customer loss. Therefore, in the design of electronic products, we must choose a suitable connector for electronic devices. Otherwise, the situation that a small connector makes the whole system unable to work is very crushing.

When choosing connectors, people will first consider cost control. Others are high quality, high stability, and the design characteristics of connectors themselves. In order to avoid electronic designers underestimating the importance of connectors in the design process, zero liter electronics now provides you with some suggestions for reference:

Firstly, the two-bar design idea. In the ERNI connector series, the idea of two-bar design runs through the whole process. Imaginally speaking, the two-pole design can be described as "one arrow, two carvings". Optimized terminal design adapts to high-speed signal transmission and provides higher directional tolerance. In comparison of inductance, capacitance and impedance, two-pole terminals are smaller than box terminals in high-speed applications, and optimized to achieve minimum interruption. The two-bar design allows multiple connectors on a circuit board without plugging or short-circuit problems, and requires no large number of signals on a single connector. Simple wiring of two rods can save space, make the connector smaller, and simplify the inspection and measurement of welding pins. For example, put 12 on a board. It also reduces the cost of rework. Practical applications such as telecommunication end-user equipment, etc.

Secondly, the design of non-depressed pin in assembly process. Due to improper processing, traditional stamping will cause bending or deforming pins, and the bending process will cause capillary cracks, which is not desirable in terms of product long-term, and will also affect circuit performance and cost. ERNI adopts direct stamping of opposite bending angle. Stamping terminals can avoid capillary cracks caused by bending process and ensure complete electromechanical connection. The coplanarity of pins is 100% and controlled to tolerance (+0.05 mm). The coplanarity detection of 100% tab pins ensures the reliability of PCB assembly process, ensures good welding, improves product quality rate and reduces cost. It also improves the firmness of the right-angle connector and prevents the connector from being damaged due to improper operation. It is very appropriate to use the term "unbreakable". Especially suitable for inkjet printer controller, interface module interface and so on.

Third: Surface mount design with high retention force. For SMT products, it is generally believed that the retention of the board is very poor. Is the PCB holding force of the surface end-to-end connection lower than that of the through-hole end connection? The answer is: not necessarily. Through design improvement, the retention of PCB can be effectively improved. If the welding bracket, the hole (micro-hole) of the surface pin and the big welding pad are superimposed, the retention force can be improved. In fact, even I/O connectors can use surface-mounted pins. This can be imagined as "rooting on the ground". For example, the design of X-ray machine, ultrasonic scanner and robot Ethernet switch.

Fourth: Strong design. It is necessary to determine the reliability of the connector, and allow the use of flat press tools. The plate is fixed on the outer shell to improve the firmness, achieve better manufacturing process and increase production. To sum up in one word is "rock-solid". Specific applications such as positron emission tomography scanner, embedded system of railway vehicles, etc.

Fifth: High current, small space design. With the requirement of miniaturization of automotive electronics and consumer electronics, it is necessary to consider the design concept of high current and small spacing.

Sixth: Advanced lock design. ERNI uses double locking design to meet different needs. Forward locking is designed for strong vibration applications. It is very suitable for automotive and subway applications. Friction locking is designed for general vibration applications. Double lock and double safety insurance ensures reliable connection, and special tools are not required for field dismantling (maintenance/replacement) cables. It is suitable for the design of monitor and LED lamp.

Connectors play a vital role in the whole electronic system design. Engineers need to pay attention not only to chip technology, but also to the selection of peripheral devices when choosing electronic components. Only in this way can the system run smoothly and achieve twice the result with half the effort.