Surface mounted protection device

Patent metadata

Field	Value
Publication number	US-10790108-B2
Application number	US-201916364838-A
Country	US
Kind code	B2
Filing date	Mar 26, 2019
Priority date	Jan 21, 2016
Publication date	Sep 29, 2020
Grant date	Sep 29, 2020

Abstract

Approaches herein provided surface mounted devices each configured as a stand-alone component suitable for attachment to a substrate such as a printed circuit board (PCB). In some embodiments, a method includes forming a base housing, coupling an electronic component to the base housing, and forming a cover over the electronic component, wherein the cover is coupled to the base housing. The electronic component may include a fusible link/element extending between terminals, the terminals wrapped around an exterior of base housing. The device may then be coupled to the PCB, for example, by attaching the terminals to an upper surface of the PCB.

First claim

The invention claimed is:

1. A surface mounted device comprising:
a base housing including a pair of sidewalls each having a plurality of corner protrusions, the plurality of corner protrusions extending inwards towards a recessed center portion;
an electronic component coupled to the base housing, the electronic component including a fusible element extending between a pair of terminals, wherein the pair of terminals are coupleable to a substrate, and wherein each terminal of the pair of terminals includes a first end directly connected with the fusible element and a second end terminating along an underside of the base housing; and
a cover disposed over the fusible element, wherein the cover is directly coupled to a top surface of each of the plurality of corner protrusions of the base housing, wherein the pair of terminals extend along an outer surface of the base housing, and wherein the cover is positioned over the first and second ends of each terminal of the pair of terminals.

2. The surface mounted device according to claim 1 , wherein the substrate is a printed circuit board.

3. The surface mounted device according to claim 2 , wherein the pair of terminals are coupled to the printed circuit board.

4. The surface mounted device according to claim 3 , further comprising a connective material electrically connecting the pair of terminals to the printed circuit board.

5. The surface mounted device according to claim 1 , wherein the pair of terminals wrap around an exterior surface of a pair of opposing end walls of the base housing.

6. The surface mounted device according to claim 1 , the base housing further comprising a set of terminal channels extending through an outer surface of the base housing, wherein the set of terminal channels are recessed below the top surface of the plurality of corner protrusions to allow each terminal of the pair of terminals to pass therethrough when the cover is coupled to the base housing, and wherein each terminal of the pair of terminals is not in direct physical contact with the cover.

7. The surface mounted device of claim 1 , wherein the top surface of each corner protrusion of the plurality of corner protrusions is planar with a top surface of each sidewall of the pair of sidewalls.

Assignees

• Littelfuse Inc

Inventors

• Beckert James
• Stumpo Gregory

Classifications

• H10W72/0198

  batch processes · CPC title

• H05K2201/10181

  Fuse · CPC title

• H01H85/04 Primary

  Fuses, i.e. expendable parts of the protective device, e.g. cartridges · CPC title

• H05K1/181

  associated with surface mounted components · CPC title

• H01H69/02 Primary

  Manufacture of fuses · CPC title