According to the action response speed, UL248 standard fuses are divided into fast acting fuse and time delay slow blow fuse. Correct selection can greatly reduce the failure rate of electrical equipment.
Fast acting fuse is characterized by instantaneous breaking, which can quickly cut off the circuit in case of overcurrent and short circuit. It has extremely high protection sensitivity and is suitable for all kinds of precise and sophisticated electronic circuits, instrument circuits and signal circuits without starting current impact.
This kind of fuse cannot bear instantaneous large current impact, so it is absolutely not suitable for motor and power equipment with starting load, otherwise it will be blown instantly when the equipment is started.
Time delay slow blow fuse is designed with anti-surge structure, which can withstand the instantaneous large current generated when the equipment starts, and will not fuse mistakenly in a short time. It only acts when continuous overload and short circuit occur.
It is the preferred fuse for motor equipment, compressors, inverters, automobile starting power supply and all mechanical equipment with starting current surge, and is widely used in industrial production lines and automobile electrical systems.
In simple terms, fast blow focuses on rapid protection of precise circuits, and slow blow focuses on stable protection of power starting equipment. The two cannot be used interchangeably.
In the after-sales maintenance of electrical equipment, more than half of the frequent fuse burning problems are caused by the wrong selection of fuse type. Replacing the correct type can directly solve the failure problem.
EssFuse supplies complete series of UL248 certified fast acting and time delay fuses, covering industrial, automobile, new energy and household electrical full scene protection needs, with complete models and sufficient inventory.
FAQ
Q1: Is slow blow fuse safer than fast acting fuse?
A1: There is no difference in safety, only different applicable scenes.
Q2: Can time delay fuse replace fast acting fuse?
A2: Not recommended, which will reduce the protection speed of precision circuits.
Q3: Does EssFuse support customized fuse specifications?
A3: We provide standard general models and support batch customized production according to customer drawings.
Choose suitable circuit protection fuses at essfuse.com.
fast acting fuse https://essfuse.com/product-category/square-high-speed-fuse/
high speed semiconductor fuse https://essfuse.com/product-category/north-american-semiconductor-fuse/