Two-piece Power Elements are a Würth Elektronik patented solution for through screw technologies on circuit boards. These high current terminal blocks and spacers enable a durable and reliable connection and mounting on the PCB without stressing it. Depending on the pin arrangement and the layout, currents of up to 500 ampere are possible. The assembly method allows individual adaptions regarding design and dimensions. That is the reason why Power Elements perfectly qualify as connecting elements for fuses, retainers/fasteners and IGBTs.
Würth Elektronik PowerTwo Power Elements are pressed in into the circuit board. Soldering is not necessary. Therefore, the PCBs are not exposed to temperature stress. This processing step easily blends in to the processing chain and is highly cost efficient. With the aid of the corresponding Press Fit tools, several Power Elements can be Press Fit simultaneously.
For the massive Press Fit Technology the PCBs are to be finished according to the Würth Elektronik ICS Press Fit specifications (see product details). Particular attention should be paid to the drill diameter and the copper thickness. Due to the different layer thicknesses of Hot Air Levelling compared to chemical surfaces, the final diameters vary.
The torques indicated in the table are based on DIN 267 part 25. Different material combinationsor different thread lengths of the connectors are not regarded here.
|Torque values for brass|
|Thread size||M 2,5||M 3||M 4||M 5||M 6||M 8||M 10||M 12|
The current carrying capacity of a Press Fit connection needs to be seen in the context of the overall system. The Press Fit zone has a very low electrical contact resistance of 100 - 200 μOhm. The limiting factor therefore usually lies in the circuit board layout or in the connection of a feed line.