What is a SMD fuse?
surface mount fuses is a new variety with relatively high technical content in the small fuse industry. Patch fuse can be divided into smd current fuse and smd self recovery fuse
How are FBelec smt fuses classified?
The patch current fuse can be divided into the following models according to size and performance:
(1) Products can be classified as 0402, 0603 and 1206 according to size
(2) Products can be classified into three types according to their performance: Wire-In-Air SMD fuse,quick-acting SMD fuse,slow fusing and enhanced melting heat energy.
SMD self recovery fuses can be classified into 0402, 0603, 1206, 1812, 2920, etc. If SMD fuse has high requirements, it is generally made of thin film with ultra-low internal resistance. It is suitable for overcurrent protection, such as surge, etc. Computer peripheral products, mobile phones and other communication equipment, digital cameras, monitors and batteries are commonly used. Manufacturers that can use this kind of technology have a certain scale.
Patch fuse can be divided into disposable patch fuse and patch self recovery fuse. The disposable fuse needs to be replaced after protection. After self recovery fuse protection, it can be recovered and reused after power failure.
FBelec smt fuse:
There are four basic types of Surface-Mount Fuse:
(1) Slow fusing type / time delay type fuse;
(2) Double alloy slow fusing fuse;
(3) Quick response fuse;
(4) Extra fast response fuse.
The slow fusing fuse is very suitable for circuits containing transient current surge or start-up surge. These circuits include: motor, transformer, incandescent lamp and applicable load device.
The fast response fuse has fast response and is suitable for circuits without instantaneous current surge.
Extra fast response fuses are usually connected with silver. Due to the current limiting capacity of fuses, these fuses are often used to protect semiconductor circuits.
Specification, shape and structure of chip mounted miniature fuse
Specifications
Most miniature fuses have been certified by the national safety specification ul248-14, which specifies the following:
① Power on capacity: power on according to the rated current for 1 hour without fusing.
② Temperature rise: the ground temperature rise is less than 75 ℃ when energized according to the rated current.
③ Fusing test: fuse within 1 minute under the condition of twice the rated current.
④ Breaking capacity: when the rated breaking capacity is added, there will be no continuous arcing or ignition.
