power fuse supply
中文
Online Message
Online Message
News & Events News & Events

News & Events

Keep abreast of company dynamics

air conditioner fuse in car.Parameters of self restoring fuses

23

2023-11

Share:

　　d83bbc296c1f220

　　1. Rated voltage

　　Rated voltage refers to the high voltage that can be withstood after the self recovery fuse is disconnected. The voltage borne by both ends of a self restoring fuse during the connection period is far less than its rated voltage. When selecting a self restoring fuse, it is generally required that its rated voltage be greater than the effective circuit voltage.

　　2. Rated current

　　The rated current is the high current that a self restoring fuse can operate for a long time. Assuming the protection current is Ir and the rated current of the self recovery fuse should be In, both should meet the following conditions: In=Ir/(fo * f1), where fo is the reduction rate for self recovery fuses of different specifications. For self recovery fuses of ICE specifications, no reduction rate can be added, that is, fo=1. For self recovery fuses of UL specifications, the reduction rate is fo=0.75. To consider the reduction rate after considering temperature, the higher the ambient temperature, the hotter and shorter the lifespan of the self recovery fuse when it operates. It should be emphasized here that the air temperature surrounding the self recovery fuse should not be confused with room temperature. Whether it is UL or ICE specifications, the requirements for self restoring fuses are formulated at room temperature of 25 ℃, so there is no need to consider a certain reduction rate. Obviously, the reduction rate of self recovery fuses varies depending on the ambient temperature. The following figure shows the reduction rate of self-healing fuses with different characteristics at different temperatures. Curve A corresponds to a glass tube self-healing fuse (full fuse: low resolution), Curve B ceramic tube self recovery fuse (ultra fast fuse, fast fuse self recovery fuse, and spiral wound self recovery fuse: high resolution) Curve C corresponds to polymer self recovery self recovery fuse (PPTC plastic polymer made self recovery fuse).

Read recommendations:

fast acting fuse vs time delay

car air conditioner fuse

22C

supercheap auto blade fuse holder.How does a fuse work?

The Application of Self Recovery Fuses in Frequency Dividers.rv air conditioner fuse location

PREVIOUS:plug in mcb for old fuse box.Main parameters for selecting patch fuses

Return

Next：glow plug fuse price.Self recovery fuse selection

Related News

September 15,2023

Reasons for the increasing importance of circuit protection components.china hs code for fuse

　　　　In daily life, electronic products are everywhere, and circuit protection has become increasingly important. In order to make circuits safer, engineers are constantly studying the safety and reliability of products. The main reasons for this are as follows:　　(1) With the demand for the development of electronic products, the functionality (integration) of ICs is also becoming stronger, and their "value" is naturally becoming more noble, so it is necessary to strengthen protection.　　(2) In order to reduce power consumption, reduce heat generation, and extend service life, the working voltage of semiconductor components and ICs is getting lower and lower. According to statistics from the American Semiconductor Industry Association, the current working voltage is around 1.5V, which will decrease to a lower level in the following years. Therefore, its ability to withstand overcurrent/overvoltage needs to adapt to new protection requirements.　　(3) There are more and more mobile electron

September 13,2023

Self recovery fuse for overheat protection in circuits

　　　　Self restoring fuses can respond to temperature increases caused by external heat and internal current, and establish thermal connections with high-voltage equipment to provide overheating protection. Establishing this thermal connection can be achieved by arranging these devices in contact with or near high-voltage equipment.　　The contact method enables the self recovery fuse to easily form physical contact with the device, thereby improving the protection effect. Transformers are a good example of this type of equipment. Self restoring fuses can be tied to external coils or enclosures to establish thermal connections. A self restoring fuse can be integrated into the circuit during design, enabling it to send a warning to the controller in the event of transformer overheating, and the system will immediately stop running.　　The close proximity method is suitable for the protection of power semiconductor components, and the best effect is achieved when a small surface mounted self r

August 14,2023

Explanation of 600V 0.5A plug-in fuse specifications and models.resettable fuse smd

　　　　The corresponding model of the brand 600V 0.5A plug-in fuse is A600-500, which is a recoverable fuse that plays an overcurrent protection role in the circuit. This model of fuse is a fast melting fuse that maintains a current of 0.5A, operates with a current of 1A, a maximum voltage of 600V, and a maximum voltage of 3A. The power generated by the fuse during operation is 5W. When the current passing through the fuse is 2.5A, the fuse will operate within 15S, At this moment, the minimum internal resistance of the fuse of the material number is 2.5 Ω, and the internal resistance after one hour of welding on the machine is 7 Ω. The above data are all for at room temperature of 25 ℃. We all know that the parameters of fuses can be affected in different working environments. If the rated current at 25 ℃ is 0.5A at room temperature, then at 40 ℃, the maintenance current of the fuse is only 88% of that at room temperature, which is 0.44A; At a temperature of 50 ℃, the fuse of this materia

October 20,2023

battery distribution fuse block.Usage and precautions for self restoring fuses

　　　　With the widespread application of self restoring fuses in the electronics industry in Shenzhen, we are paying more and more attention to the safety of electronic products. We need to know the performance of the products used　　Among the technical indicators of PPTC, one is Vmaxi, which represents the maximum voltage that the self recovery fuse protector can withstand in a blocked state. That is to say, in a circuit where the self recovery fuse is connected in series, when the current of the circuit is abnormal, the self recovery fuse will jump from low resistance to high resistance within a certain time range, thereby preventing the flow of abnormal large current and protecting the subsequent circuit from being damaged by large current. At this time, almost all of the voltage of the circuit is added to the self recovery fuse.　　If the voltage applied to the self recovery fuse exceeds Vmaxi at this time, it is easy to cause damage to the self recovery fuse, causing permanent damage a

January 22,2024

Wiring method of fuse holder

　　　　The wiring methods of fuse holders mainly include plug-in wiring and threaded wiring. Plug and play wiring refers to inserting wires into the socket inside the fuse holder and clamping them with spring plates to achieve wiring; Screw type wiring is the process of threading wires into threaded holes in the fuse holder and connecting them through the frictional force of the threads. Below, we will introduce these two wiring methods separately.　　Plug and drop wiring is a common fuse holder wiring method. It has the advantages of simple wiring and convenient installation, and is suitable for application scenarios with smaller wire sizes. The spring plate of plug-in wiring needs to ensure sufficient force and reliability when clamping the wire. According to statistics, fuse holders with plug-in connections have a slightly higher electrical failure rate than fuse holders with threaded connections, but their prices are cheaper. The plug-in fuse holder is suitable for low voltage and low c

+86 755 89762685

MB:+86 13924633629 Ms.vicky

E-mail: waimao@xcfuse.com


Factory :

XC Electronics(Shenzhen)Corp.,LTD

Add: Jinyuan Industrial zone,Heao, Henggang, Shenzhen 518115,China


Shenzhen branch: Shenzhen Xucheng Electronic Commerce co.Ltd

Add: 8-15 Jinyuan Industrial zone,Heao, Henggang, Shenzhen 518115,China

About Us Products Resource Solutions Certifications News & Events Contact Us

© Copyright. xc 2023. All rights reserved.粤ICP备11049369号