The letter “T” on common fuses, such as T2AL250V. T represents delayed slow break, 2A represents rated
current, L represents low section, common low section is glass tube, 250V is rated voltage. From the
perspective of professional protective components, this is usually a delayed fuse. Its function in the circuit
is to reduce surge current through rated current and provide protection, and the fuse will not break. For
example: TT2AH250V, TT stands for ultra slow delay fuse, rated 2A represents current H represents high
segment, which is commonly made of ceramic tubes. Ultra slow delay fuses are rarely used in the market
and are used in special circuits. In F2AL250V, F refers to fast fuses, 2A refers to rated current, L represents
low segment, 250V is voltage, and FF is ultra fast speed fuses. These types of fuses are used in special
circuits and are customized products