Electronic unit having an assembly for limiting current
An electronic assembly, has at least one circuit board with conductor tracks, at least one current-limiting arrangement in the form of a thermal predetermined breaking point in at least one of the conductor tracks, and a fire-containment device in the region of the current-limiting arrangement.
1. An electronic assembly, comprising:
at least one circuit board formed with conductor tracks;
at least one current-limiting arrangement being a thermal predetermined breaking point in at least one of said conductor tracks; and
a fire-containment device at said current-limiting arrangement;
said fire-containment device including an airtight metal hood disposed above said current-limiting arrangement and enclosing a surroundings of said current-limiting arrangement in an airtight manner.
2. The electronic assembly according to claim 1 , wherein said metal hood is soldered onto said circuit board.
3. The electronic assembly according to claim 1 , wherein said metal hood is adhesively bonded to said circuit board.
4. The electronic assembly according to claim 1 , wherein said metal hood is form-fittingly or frictionally connected to said circuit board.
5. The electronic assembly according to claim 1 , which further comprises a housing and wherein said airtight hood has a cover formed by a portion of said housing, wherein said hood has sidewalls formed at least partly by a sealing material applied to said circuit board and surrounding said current-limiting arrangement, such that said hood encloses the surroundings of said current-limiting arrangement in an airtight manner.
6. The electronic assembly according to claim 5 , wherein said sealing material is a thermally conductive material.
7. The electronic assembly according to claim 1 , wherein said fire-containment device has a flame-retardant material arranged adjacent said current-limiting arrangement.
8. The electronic assembly according to claim 1 , wherein said fire-containment device includes a flame-retardant material arranged adjacent said current-limiting arrangement.
9. A motor vehicle, comprising the electronic assembly according to claim 1 .
10. The electronic assembly according to claim 1 , further comprising an electronic component contacting the at least one of said conductor tracks with the at least one current-limiting arrangement.
11. The electronic assembly according to claim 10 , wherein said electronic component is disposed on said at least one circuit board.