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October 27,2023

Terminology for the characteristics of fuses.

　　1. Rated current: The working current of a fuse (the maximum current that a fuse can maintain normal operation for a long time under normal conditions).　　2. Rated voltage: The working voltage of the fuse (the maximum voltage that the fuse can safely withstand at the moment of disconnection). When selecting a fuse, the rated voltage should be greater than the input voltage of the protected circuit.　　3. Breaking capacity: When a large overload current (such as a strong short circuit) occurs in a circuit, the fuse can safely cut off (break) the maximum current of the circuit. It is an important safety indicator for fuses. Safe breaking refers to the phenomenon of avoiding splashing, burning, explosion, and other hazards to surrounding components, components, and even personal safety in the breaking circuit.　　4. Overload capacity (carrying capacity): The maximum overload current that a fuse can maintain for a specified period of time.　　UL standard stipulates that the maximum non fusing c

August 07,2024

Precautions for using fuses

　　　　Using a fuse that is too small can easily burn out and cause power outages, while using one that is too large may cause damage to electrical equipment. So for safety reasons, to ensure the "safety" of the fuse, the following points should be noted:　　(1) Do not use fuses that are too thin. Using thin fuses can easily cause the normal current passing through to burn out, resulting in unnecessary power outages;　　(2) Suitable fuses must be selected and used, and the melting current of fuses is usually 1.5 to 2.0 times the rated current. If the total power of all appliances in a household exceeds 1100 watts during normal electricity use, choose a 5 ampere fuse and use a 20 gauge fuse with a diameter of 0.98 millimeters. When the current exceeds 7.5 amperes to 10 amperes, the fuse will automatically melt to achieve protection;　　(3) When installing fuses on power switches, live operation is not allowed. The power switch should be pulled open to disconnect the power supply;　　(4) Wrap the f

October 13,2023

mini cooper fuse box symbols meaning.Disposable slow blown fuse

　　　　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.

August 13,2024

Principle of action of resettable fuse

　　　　The working principle of a resettable fuse is the dynamic balance of energy. The current flowing through the resettable fuse generates a certain degree of heat due to the thermal effect of the current (there is a resistance value in the resettable fuse). All or part of the heat generated is dissipated into the environment, but the remaining heat will increase the temperature of the resettable fuse element.　　During normal operation, the temperature is low and the heat generated and dissipated reaches equilibrium. When the resettable fuse is in a low resistance state, it does not work. When the current flowing through it increases or the ambient temperature rises, if the generated and dissipated heat reaches equilibrium, the fuse will remain inactive.　　If the current or temperature continues to rise at this time, the heat generated will be greater than the heat dissipation, causing a sharp increase in the temperature of the resettable fuse. Therefore, small temperature changes will l

November 15,2023

breville coffee machine thermostat.How to Design Chip Fuses

　　　　In electronic products, chip fuses have two functions: protecting end users from harm and protecting circuits from damage. These functions benefit both device users and manufacturers. Over the past decade, the demand for electronic devices serving information technology, mobile, and consumer applications has sharply increased in the market. With this rapidly growing demand, the risk of unexpected situations in electronic devices has also increased, requiring the use of overcurrent protection devices such as chip fuses to avoid risks such as electrical overload.　　Before analyzing the electrical characteristics of various chip fuses in the market, it is first necessary to understand the basic design principles behind each technology.　　Standard fuses may be based on metal wires placed inside sealed ceramic or glass tubes filled with air or sand, but chip fuses are based on completely different principles. Most chip fuses appear to be standard chip devices and are made of single or mul

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