Assembly Instructions
AN2009-01
General Information
Application Note 6 V2.2, 2015-02
1.1 General Information on power module handling
This section describes forces on module housing – DCB push-out
The power module is not designed to withstand forces on the module housing as shown in the example
of Error! Reference source not found.. The module pins are here located on a flat table. Forces on
the module housing (Fp) are pushing the DCB out of the housing. Therefore, forces (Fp) on the
module housing at handling have to be avoided. Please note that this is a different case compared
to the normal press-in process, where the DCB is fully supported in the press-tool and the press-in
forces act on the DCB not on the housing.
Fp
Fp Fp
Fp
Figure 3: Forces on the housing at module handling should be avoided to prevent a push-out
of the DCB.
Some modules will have quite low DCB push-out forces (Fp) and is not an assured property of the
power module. This is uncritical for real applications, because the housing is fixed later on the cooling
system by the integrated clamps and thus the housing cannot move (lift) in a critical way. Furthermore,
the “sealing rope” between the module frame and the DCB has only the function to seal the module,
when the isolating gel is filled-in in our production process. After the filling process, the liquid gel is
heated out and gets a soft but solid consistency. The sealing has no glue function in the final product.
DCB
housing