In the glass fuses' code F is for fast blown the second number is the current, but I do not know what is the difference between L an AL (if there is any).
Could someone explain this.
They are the same 5A 250V fast acting low breaking capacity fuses (just one omits the A of ampere)
The glass cartridge fuse code is structured in this way
|Acting Speed| |Current rating| |Breaking capacity| |Voltage rating|
|Package size code| |Acting Speed| |Current rating| |Breaking capacity| |Voltage rating|
The time it takes for the fuse to open when a fault current occurs. It code could be:
FF - Very Fast Acting (Flink Flink)
F - Fast Acting (Flink)
M - Medium Acting (Mitteltrage)
T - Slow Acting (Trage)
TT - Very Slow Acting (Trage Trage)
It is the current that a fuse is able to interrupt without being destroyed or causing an electric arc with unacceptable duration. The capacity of a fuse to operate between the lowest and the Rated Breaking Current code could be:
H - High Breaking Capacity
L - Low Breaking Capacity