US 12,131,849 B2
Fast activation thermal fuse for short circuit current protection
Long Min, Dongguan (CN); Libing Lu, Dongguan (CN); and Dongjian Song, Dongguan (CN)
Assigned to Dongguan Littelfuse Electronics Company Limited, Donggun (CN)
Appl. No. 17/801,856
Filed by Dongguan Littelfuse Electronics Company Limited, Dongguan (CN)
PCT Filed May 11, 2020, PCT No. PCT/CN2020/089639
§ 371(c)(1), (2) Date Aug. 24, 2022,
PCT Pub. No. WO2021/169046, PCT Pub. Date Sep. 2, 2021.
Claims priority of application No. 202020218035.3 (CN), filed on Feb. 27, 2020.
Prior Publication US 2023/0085845 A1, Mar. 23, 2023
Int. Cl. H01C 7/12 (2006.01)
CPC H01C 7/126 (2013.01) 20 Claims
OG exemplary drawing
 
1. A flat spring for use in a surge protection device (SPD), the flat spring comprising:
a first terminal comprising a substantially L-shape in a first plane, the first terminal comprising a first portion and a second portion, wherein the second portion is orthogonal to the first portion;
a multi-part section coupled to the second portion of the first terminal, the multi-part section being orthogonal to the second portion and parallel to the first portion, the multi-part section further comprising:
a V-shaped protrusion having a first side, a second side, and a bottom region, the bottom region being at a first depth; and
a solder-side terminal being at a second depth;
wherein the first depth is lower than the second depth.