LANSON
Square Fuse Detailed Explanation
LANSON square fuses are one of the important categories of circuit protection components produced by Shenzhen Liangsheng Electronics Co., Ltd. Since its establishment in 1997, the company has been focusing on the research and production of various circuit protection components such as current fuses, temperature fuses, gas discharge tubes, etc. The products are widely used in various electronic and electrical equipment such as power supplies, adapters, household appliances, lighting appliances, communication equipment, etc.
Product Overview and Features
Liangsheng square fuse belongs to the category of miniature fuses (square type), adopting a square packaging design, with the characteristics of compact structure and easy installation, which can effectively save circuit board space. These types of fuses are usually packaged with plastic or ceramic materials, which have good insulation and mechanical strength.
Among them, SMT1315A is a representative Liangsheng square fuse with a rated current of 3.15A and a rated voltage of 250V, belonging to the delayed/slow melting type fuse. This delay characteristic enables it to withstand brief current surges without immediately melting, avoiding unnecessary circuit breaks. It is particularly suitable for circuits containing inductive or capacitive loads such as motors and capacitors, which typically generate large instantaneous currents during startup.
Technical specifications and performance
The specific size of Liangsheng square fuses such as SMT1315AP is about 8.4mm7.7mm4mm, and they are packaged with braided tape for easy automation production and installation. Its melting characteristics comply with the requirements of the UL248-14 safety standard in the United States, which includes several key performance indicators: firstly, the fuse should not melt when subjected to rated current for 1 hour; Secondly, the temperature rise at this time should be less than 75 ℃; Thirdly, when passing through twice the rated current, it should melt within 1 minute; Finally, under rated breaking capacity conditions, the fuse should not produce sustained arcing or ignition phenomena.
The melting time of a slow break fuse is inversely proportional to the magnitude of the overload current: when passing through 210% of the rated current, the maximum melting time does not exceed 2 minutes; When passing through 275% of the rated current, the melting time is shortened to between 400 milliseconds and 10 seconds; When passing through 400% of the rated current, the melting time is further reduced to 150 milliseconds to 3 seconds; When passing through 1000% of the rated current, the fuse will quickly melt within 20 milliseconds to 150 milliseconds. This time current characteristic ensures that unnecessary melting can be avoided while providing quick protection in the event of an overcurrent fault.
Application field
The Liangsheng square fuse is widely used in various electronic and electrical equipment due to its reliable protection performance and compact structural design. In the field of household appliances, such as rice cookers, electric irons, and other products, it provides overcurrent protection function. In power supplies and adapters, such fuses are essential protective components to prevent equipment damage caused by overcurrent due to internal faults or external load abnormalities.
Liangsheng square fuses are also used in communication equipment to provide protection for precision electronic circuits. With the development of technology, Liangsheng has also developed automotive grade fuses certified by IATF16949, with a temperature resistance range of -55 ℃ to 125 ℃, which are applied in new energy vehicle battery management systems and onboard electronic systems.
Manufacturing process and quality assurance
Liangsheng Electronics has a modern production plant of over 8000 square meters, with a monthly production capacity of 100 million units. It adopts advanced processing and assembly equipment, such as fully automatic inspection machines and high-speed surface mount machines, to ensure production consistency. The company is also equipped with an EMC testing center and reliability laboratory, which can complete rigorous environmental verification such as high temperature and humidity, mechanical impact, etc., to ensure product quality and reliability.
Liangsheng square fuses comply with international environmental standards, meet RoHS (2011/65/EU) and REACH regulations, do not contain harmful substances, and support access requirements for multiple global markets. The company holds ISO 9001 quality management system and ISO 14001 environmental management system certifications, ensuring full process quality control of products from design to production.
summary
LANSON square fuses, as an important component of circuit protection, play a crucial role in electronic and electrical equipment protection due to their miniaturized design, reliable protection performance, and wide applicability. Especially its slow break product series can effectively distinguish between the instantaneous current during equipment startup and the true overload fault current, ensuring the normal startup operation of the circuit and providing effective overcurrent protection. With the development of new energy and intelligence trends, Liangsheng Company continues to be committed to product technology innovation, expanding towards high voltage and miniaturization, and providing more comprehensive and reliable circuit protection solutions for electronic devices.
