What are the key requirements for automotive connector terminals?

The key requirements for automotive connector terminals are: Take the crimp frame assembly, by applying a torque of 0.8nm to the screws, an actual contact force can be generated, which can be up to 750N, and the magnitude of this force is independent of the wire cross section. In this way, the use of plug-in terminal crimp frames allows for a connection that is independent of the environment, with a large contact area and a high contact force. The size of the voltage drop at the small contact point is also an important indicator of the quality of the terminal block.　　At the same time a very small force distance is applied to the screw, the value of the voltage drop is still considerably lower than the range specified by VDE0611. The voltage drop remains almost unchanged when the torque is varied over a wide range. Therefore, although the size of the torque used by different operators is different, but does not affect the quality of the wiring. It also proves the reliability of plug-in terminals using crimp frames. A large contact force with self-locking only makes sense if it acts on the wire permanently.　　In this regard, the terminal block using a crimp frame is also extremely reliable. A tongue with a thread is pressed on, and during tightening of the screw, the tongue bounces upwards and thus exerts a counterforce on the screw. Changes in the diameter of the conductor due to temperature variations are counteracted by the elastic action of the crimp frame itself, thus eliminating the need to tighten the screws. A crimp frame with a pressed-on wire is subjected to a 168-hour aging test at 130oC, followed by a 168-hour vibration test at 20 times the acceleration of gravity.　　After tests even more stringent than VDE0611, it was found that the pulling force of the wire from the crimp frame was six times greater than that specified in VDE0611, while the voltage drop remained unchanged. This clearly demonstrates that the terminals are maintenance-free with the crimp frame. Sealing multiple environmental factors, such as temperature, air humidity and other long-term action on the terminals, so the terminals must have the ability to withstand the test of unfavorable environmental factors, according to DIN41640 Chapter 76 of the provisions of the test and practical experience has proved that in the connection of soft wires, crimp box can also maintain sealing performance without the need to press the terminals.

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