Infineon PressFIT, Руководство по сборке

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Application Note 19 <Revision 2.4>
<<2019-06-17>>
Assembly Instructions for the Easy-PressFIT Modules
Table 4 Technical data of the mounting screw
Description Values
Mounting screw M4
Recommended mounting torque Ma = 2.0 – 2.3 Nm
Recommended thread engagement for screws with property class 4.8 to
6.8 for different materials
Aluminium cast alloy
Aluminium alloy hardened
Aluminium alloy not hardened 2.2 x d = 8.8 mm
1)
1.2 x d = 4.8 mm
1)
1.6 x d = 6.4 mm
1)
Washer acc. to DIN 125 D = 9 mm
1)
As per technical literature
9.2 Assembling Easy3B module on heat sink
For the assembly of the Easy3B module to the heatsink, Infineon recommends the use of DIN M5 screws, in
combination with a M5 washer.
Position the module correctly to the heat sink, so that the mounting area of the module is congruent with the
threaded holes in the heat sink. Make sure that there are no foreign objects between the module and the heat
sink.
The module can be fixed by screwing and tightening both screws at the same time (see Figure 17Figure 14).
Figure 17
Steps for alternative fastening of the module
Alternatively, the module can be mounted to the heat sink in several steps (see Figure 18):

Step 1: The first screw can be screwed in slightly. Do not fully tighten it, so that no pressure is exerted.

Step 2: The second screw needs to be firmly screwed to the heat sink.
 Step 3: Finally, the first (loose) screw needs to be screwed on firmly to the heat sink.
Note: If the module is first pressed in to the PCB, or if a later disassembling of the module is desired, the PCB
must contain suitable through-holes. The hole size depends on the screwdriver size or the screw’s head
diameter or washer.