At first glance, if its overall appearance is relatively square, without deformation, and the surface is flat without any scratches or burrs, and the thickness is relatively uniform, it indicates that its quality is relatively good. Of course, if the product quality is perceived to be poor at first glance, it must not be purchased.
Screw connection adopts a screw type terminal block connection method, paying attention to the maximum and minimum cross-sectional area of the allowed connecting wires and the maximum tightening torque allowed for screws of different specifications.
The plug-in series wiring terminals are composed of two parts that are connected by plugging and unplugging. One part compresses the wires and then plugs them into the other part, which is soldered onto the PCB board. This bottom mechanical principle ensures the long-term airtight connection of the product and the reliability of the finished product's use through this anti vibration design.
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