Some Knowledge about Patch Fuses
The fuse breaking current of the patch fuse is 1.5 to 2.0 times the rated current. When electrical equipment is in normal use, its fuse will not break. When the current in the circuit exceeds 5 times its rated current, it will automatically break to provide protection. If the fuse melts during normal use of electrical equipment, it indicates that the current in the circuit exceeds the rated current. Therefore, the cause should be immediately investigated.
During the installation process of patch fuses, it is necessary to first pull off the switch on the distribution board and cut off the power supply. It is better to use an electric pen to test whether there is power before operating. For fixing screws and washers, copper should be used instead of iron temporarily, as iron can easily rust and lead to poor contact over time. When tightening the fuse, do not use excessive force to prevent the fuse from being flattened and causing a reduction in the cross-sectional area, rated current, and melting current, which may not have the desired "safety" effect.
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Precautions for Selecting Chip Fuses
With the development of highly integrated electronic products such as digital cameras, laptops, and smartphones, and urgent need for factories to adopt full automation to reduce high labor costs in the market environment. Chip fuses are widely used in overcurrent protection applications, but due to differences in technology, they have different advantages compared to plug-in self-recovery fuses. At the same time, chip fuses also have some of their own weaknesses.
The Selection of Miniature Fuses
Miniature fuses are primarily used in digital cameras, laptops, mobile phones, and other electronic products. From traditional glass tube fuses to miniature fuses, the selection focus varies slightly due to differences in product technology. The selection of miniature fuses involves the following elements.
How to Choose a Patch Fuse?
Chip fuses are mainly used in electronic products such as digital cameras, laptops, and mobile phones. From traditional glass tube fuses to micro fuses and chip fuses, the focus of their selection is slightly different due to differences in product technology.
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Introduction of Surface Mount Fuses
Surface mount fuse is a widely used protective component in electronic circuits. Patch fuses are compact in size and typically flat in shape. This compact structure gives it a unique advantage in the trend of miniaturization in modern electronic devices, effectively saving space on circuit boards.
Surface Mount Fuse, a Widely Used Protective Component in Electronic Circuits
Surface mount fuse is a widely used protective component in electronic circuits. Structurally speaking, patch fuses are compact in size and typically flat in shape. They are designed to be suitable for surface mount technology (SMT) and can be easily installed on printed circuit boards (PCBs).
What are the Types of Glass Tube Fuses
What are the types of Glass Tube Fuses?
How Many Types of Fuses are There?
Below is an introduction to the classification by type, which can be divided into current fuses: patch fuses, miniature fuses, plug-in fuses, and tubular fuses； Temperature fuse: RH square type, RP resistance type, RY metal case； Self recovery fuse: plug-in, laminated, patch.
Experience in Selecting Self Recovering Fuses
Do you have any good experience to share in selecting self recovering fuses? Self recovery fuse is an overcurrent electronic protection component, which is made of high molecular weight organic polymers under high voltage, high temperature, and sulfurization reaction conditions, mixed with conductive particle materials, and processed through special processes.
SMD fuse and Chip Fuse Specifications
SMD fuses can be divided into SMD disposable fuses and SMD self recovery fuses. Among them, the specifications of patch disposable fuses include series 060312062410 fuses, and the specifications and dimensions of patch self recovery fuses include series 0603, 0805, 1206, 1210, 1812, 2920, etc.
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There are many types of fuses, including classification by protection form, scope of use, volume, rated voltage, breaking capacity, and fusing speed.
Self Recovery Fuse on Mobile Power PCB Board
The mobile power supply consists of overcurrent protection devices, batteries, and control charging and discharging circuits. The previous charging and discharging circuits used ICs for overcurrent protection, which were complex, had high failure rates, and high costs. Some users returned or repaired the circuit, and the manufacturer was fined and claimed compensation, which caused great trouble for manufacturers and designers. The above problems must be solved in order to promote their application.
How to Choose the Rated Voltage and Current of Chip Fuses
How to choose the rated voltage and current of a patch fuse: The rated voltage of a patch fuse depends on the current flowing through it, and is not related to the working voltage of the circuit. From the perspective of safe use, the rated voltage of SMD fuse is proposed, which is the highest working voltage of the circuit when the SMD fuse is in a safe working state. This means that fuses can only be placed in circuits with a working voltage less than or equal to the rated voltage of the fuse. Only in this way can the fuse operate safely and effectively.
Selection Techniques and Installation Process of Chip Fuses
The fusing current of patch fuses is 1.5 to 2.0 times the rated current. When electrical equipment is in normal use, its fuse will not blow. When the current in the circuit exceeds 5 times its rated current, it will automatically fuse to provide protection. If the fuse of the electrical equipment blows during normal use, it indicates that the current in the circuit exceeds the rated value. Therefore, the cause should be promptly investigated.
The Location where the Fuse is Connected to the Circuit and Connection Method of Patch Fuse in Circuit
Usually, fuses are connected in series in a circuit. If the fuses are connected in parallel in the circuit, the current cannot be disconnected promptly in case of abnormal conditions in the circuit. If you want to use overload protection for multiple circuits, multiple fuses can be connected in series in that circuit.
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