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August 09,2023

Knowledge of Automotive Fuses.resettable 5 amp fuse

　　　　According to the application scope, tubular fuses can be divided into industrial appliances and household appliances; According to the application industry, tubular fuses can be divided into instrument, communication, power supply, lighting, automotive, etc.　　It is worth mentioning that there are two types of automotive fuses, namely high current and low current fuses. But the more common type of fuse in general cars is medium to low current fuse, and the wiper fuse mentioned today belongs to plug-in fuse. You can see the 25A (colorless and transparent) sign, in fact, this is the safety value of the fuse, so you must sit down before replacing it, but do not change other models.　　Firstly, the color of the car fuse represents its specifications.　　The most commonly used fuses are 10A, 15A, 20A, 30A, and 40A. The colors are red, blue, yellow, green, and orange.　　Secondly, the specifications of automotive fuses are divided into three categories: large, medium, and small. Cars generally

August 24,2023

Detailed explanation of JDT/JFP-F series quick break resistor type fuses.fast blow fuse vs circuit breaker

　　　　The characteristics of the JFP-F series quick break resistor type fuse include:　　1. Pin tensile strength: 5N for 10 ± 1 S;　　2. Pin thrust strength: 2N for 10 ± 1 S;　　3. Solderability:　　Wave soldering: 260 ℃, ≤ 3s;　　Soldering iron: 350 ± 10 ℃, ≤ 3s;　　4. Welding heat resistance:　　Wave soldering: 260 ℃, 10s;　　Soldering iron: 350 ℃, 5s　　The electrical characteristics of the JFP-F series quick break resistor type fuse are: all testing environments have a temperature of 25 ± 5 ℃,　　Load capacity: When the fuse passes through 100% of the rated current, it should not blow within 4 hours.　　Breaking capacity: The fuse can withstand breaking capacity: up to 50 A under 125/250 V AC power supply.　　Apply 1.0 times the rated current when the temperature stabilizes (measure 4 times within 5 minutes, and the difference between each measurement and the average value should not exceed 2 ℃). The temperature rise of any part of the fuse shall not exceed 75 ℃, and the ambient temperature shall be 25 ± 5

August 19,2023

How many amperes of fuses should be selected for the 315 transformer?trolling motor fuse

　　　　The low voltage current of the transformer is 453.6A (315KVA * 1.44=453.7A), and a fuse should be selected that is about twice as large.　　The high-voltage current of the transformer is 12.6A (315 * 0.04=12.6A), and a fuse of 2-2.5 times should be selected. The content in parentheses is a simple calculation of the high and low voltage currents of transformers.　　Due to the fact that the primary fuse of the transformer is used for short circuit protection (it cannot protect against overload on the low-voltage side), it is usually selected at a ratio of 1.5-2 times. As the load is only 270A, it is evident that there is no problem with heavy load startup. The load current is only 270A, so choosing 300A or 400A is sufficient.　　If the capacity of a single motor carrying a load on a transformer is close to the capacity of the transformer, when selecting a secondary side fuse, a fuse specifically designed to protect the motor should be selected, and the size should also be selected accordin

August 15,2023

250V 1.2A plug-in fuse A250-1200.resettable fuse smd

　　　　The commonly used series of plug-in fuses include A16, A30, A60, A72, A240, A250, A600, which belong to plug-in recoverable fuses. The maximum voltage of the A250 series plug-in fuse is 250V, and the commonly used current range of this series is 0.03A-1A. Today we will learn about the 1.2A fuse part number of the 250V series plug-in fuse type.　　250V 1.2A plug-in fuse, the corresponding model of the brand is A250-1200. The holding current of this material number is 1.2A, the triggering current is 2.4A, the maximum voltage range is 220V~250V, and the maximum current is 5A. When the current passing through the fuse reaches the classic current value of 6A, the fuse will operate within 15 seconds. The power Pdtyp generated during the action of this material number is 5W, with a minimum resistance Rmin of 0.17 Ω, a maximum resistance Rmax of 0.28 Ω, and a maximum resistance R1max of 0.5 Ω after the first action.　　The dimensions of the A250-120 plug-in fuse are: width A: 16.7mm, height B:

October 17,2023

battery terminal fuse replacement.How to identify whether a patch fuse is original or not?

　　　　Attention should be paid when purchasing SMD fuses. If the fuse is not original, has undergone secondary processing or multiple uses, the quality of the fuse is not guaranteed, and problems may occur during use. The original SMD fuse, as long as it is a qualified product, can timely disconnect the circuit in case of overload and short circuit, protecting the product from damage. So how do I know if the purchased SMD fuse is original?　　1. Is the packaging of the SMD fuse intact　　Generally, fuse manufacturers have markings (markings, numbers, etc.) on the packaging of fuses. The packaging materials and methods must comply with standard regulations, and the internal and external packaging of the product must be firm, complete, dry, and clean. If the import and export trade contract complies with the packaging materials, packaging methods, and padding requirements, it must also comply with the contract provisions. After receiving the patch fuse, it is necessary to check whether the pac

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