A connector for a case shell of a power apparatus includes a main body member. Two ends of the main body member are respectively connected to different members of the case shell, and the main body member is deformable; and the main body member is used to deform when an explosion occurs inside the case shell and the different members of the case shell connected by means of the main body member are disengaged from each other. The main body member of the connector can deform when devices inside the case shell explode and the different members of the case shell connected by means of the main body member are disengaged from each other, such that two members of the case shell connected by means of the main body member are slightly disengaged from each other to form a gap.

A power module includes a substrate, a power semiconductor die, an enclosure, a first type pressing element, and a second type pressing element. The substrate and the enclosure delimit an interior space of the power module. The enclosure includes a first fastening side and a second fastening side, each including a fastening feature, and a first non-fastening side and a second non-fastening side that each intersects the first fastening side and the second fastening side. A first type pressing element is at the first fastening side and the second fastening side, and a second type pressing element is at the first non-fastening side and the second non-fastening side. Both types of pressing elements are configured to press against the substrate in a mounted state of the power module. The second type pressing element has a different geometrical structure and/or material composition than the first type pressing element.