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Detailed explanation of Resettable Fuses packaging and depth of action

baijiahao | 27/05/2021

Like many electronic semiconductors and passive components such as: chip resistors, chip capacitors, fuses, inductors, etc., they all need to be packaged because the product after packaging is also more convenient to use, and the fuse is also the fuse after packaging. Placement, fixation, sealing, etc. also play a role in fuse fuse and enhance thermal conductivity, and are not easily damaged. Convenient for transportation, etc. So how important is the package to the fuse, let me explain in depth with the "Resettable Fuses package and function".

1. There are two types of self-recoverable fuse packaging. One is patch packaging and the other is plug-in packaging. I believe that many of my friends don't know the specific dimensions. See below for details.

SMD resettable fuse packaging and size from small to large: 0603, 0805, 1206, 1210, 1812, 2018, 2920, 1210, 1206

Plug-in resettable fuse package and size from small to large: A16, A30, A60, A72, A240, A250, A600

2. the role of self-recovery fuse packaging

Because the fuse must be isolated from the outside world, to prevent impurities in the air from corroding the fuse circuit and causing deterioration of electrical performance, protect the surface of the fuse and connecting wires, etc., so that the very delicate fuse is protected from external forces and environmental factors at the level of electrical equipment or thermal physics. It can reduce the ground stress caused by the change of environmental factors such as heat and the negative impact caused by the hot fuse, thereby avoiding the fuse damage and invalidation. On the other hand, I mentioned at the beginning that the fuse plays a role of placing, fixing, and sealing after packaging.

Generally speaking, we do not recommend secondary packaging of fuse products. If you must conduct secondary packaging, you must pay attention to the choice of packaging materials. If the packaging material is too hard, it will cause the normal use of the resettable fuse, even if the packaging material is very soft, it may cause the resettable fuse to dissipate heat and other performance effects. It is recommended to use the original package.

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