Why sometimes patch type fuses become highly resistant and we know that the operating principle of tubular fuses is: overcurrent causes the thermal balance on the melt to be disrupted, and when the melt temperature rises to the melting point of the metal material, the middle part of the melt changes from solid to liquid. Due to the surface tension and gravity of the metal material suspended in the tube, the liquid part of the melt pulls away from both ends and drops downwards, The flashover caused by voltage causes the melt temperature to continue to rise, further flashover and further widening the distance until the circuit is completely cut off. For patch type fuses, their operating principle is the same. However, due to different structural states, the surrounding of the metal melt is tightly surrounded by the polymer or ceramic materials of its matrix. Even the melted metal cannot contract towards both ends and can only rely on diffusion, infiltration, or absorption towards the
Most circuits generate an instantaneous surge current when the power is first connected. In capacitive or inductive circuits, this surge current is often many times, or even dozens of times, greater than the normal steady-state current. If the surge resistance of the fuse used in the circuit is not strong enough, the fuse will be blown off by high-energy surges. If the duration of this surge current is short and the energy released is insufficient to break the fuse, the fuse will not break and will only be damaged to a certain extent. It will only be broken after a certain number of surge impacts. Similarly, hot swapping of some plug-in components during the operation of the entire machine can generate large pulse currents. At this time, if the fuse's pulse resistance is not strong enough, it will often be blown by the pulse. To avoid fuses being blown off by surges or pulse currents and unable to function properly, we need to choose the correct type of fuse and choose the appropri
Due to the small resistance value of the fuse itself, and we hope that the smaller the better, the voltage drop at both ends of the fuse is very small, much smaller than the rated voltage of the fuse. Therefore, when the fuse operates normally, the rated voltage has little practical significance. The true significance of the rated voltage of a fuse lies in its safety performance. As a safety component, a fuse must be ensured to be safe during normal operation, during protective actions, and at any time after the melt melts. During and after the melt melts, the rated voltage of the fuse is of great significance. The unsafe factor when a fuse blows comes from the energy released by overcurrent, and the magnitude of this energy depends on the product of current and voltage. The maximum current to ensure the safety of the fuse is the rated breaking capacity, and the maximum voltage is the rated voltage. If the rated voltage of the fuse is less than the circuit voltage, it may cause uns
As a safety component, in addition to its performance requirements, a fuse must also have strict safety requirements. The breaking capacity of a fuse is an important indicator reflecting the safety performance of the fuse. Its specific meaning is: the maximum short-circuit current that the fuse can withstand without any unsafe phenomena during the process of breaking the circuit. The unsafe phenomena here include - continuous arcing, smoking, spraying, splashing Burning, explosion, etc. Tubular fuses can be classified into high breaking (1500A), low breaking (35A or 10In), and enhanced breaking (150A) types based on their breaking capacity. The breaking capacity of chip fuses is generally between 30-60A, which is often overlooked or misunderstood by users or confused with the fusing characteristics of fuses, The correct understanding of the breaking capacity of a fuse should be that the extreme maximum current in the event of a short circuit in the protected circuit cannot exceed t
The disposable slow blow fuse 0402 is a very compact patch fuse with a size of only 1 * 0.5mm, making it the smallest fuse in the patch fuse. The BFS0402 series of BDT-FUSE brand can be selected for the 0402 disposable slow blow fuse. This series is a surface mount fast melting thin film fuse. The ultra small package (0402 specification) is very suitable for secondary protection of circuits and is suitable for applications with limited space, such as handheld portable electronic devices. This series is 100% lead-free and meets the requirements of the RoHS directive. The BFS0402 series can correspond to a working current range of 0.25A, 0.375A, 0.5A, 0.75A, 1A, 1.25A, 1.5A, 1.75A, 2A, 2.5A, 3A, 3.5A, 4A, 5A, and a working voltage of 32V. The interruption rating under 32VDC is 35A. BFS0402 provides maximum protection for sensitive circuits, and the fuse can activate protection within 5 seconds under a 200% overload condition.
The 0467 series patch fuse is a disposable fuse, and the fast melting surface mount fuse (SMF) is a ultra small (0603 size) thin film device designed for secondary protection of circuits used in space limited applications such as handheld portable electronic devices. This series is 100% lead-free and meets the requirements of the RoHS directive. The rated current range of the 0467 series patch fuse is 0.25A-5A, the rated voltage is 32V, the working environment temperature is -55 ℃ to 125 ℃, the cold resistance is 0.0089-0.5650, and the voltage drop is 61.20-158.56. The main material of this series: The fuse body is mainly an advanced high-temperature substrate, with 100% tin nickel on copper at both ends and a conformal coating on the outer layer. This series works normally in an environment of -55 ℃~90 ℃, with a specification size of 1.6mm * 0.8mm and packaging method of 8mm mm tape and reel, with 5000 pieces per roll. 0467 Chip Fuse Parameter Table The 0467 series fuse models
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
