# What is the difference between F5AL250V and F5L250V fuses?

In the glass fuses' code F is for fast blown the second number is the current, but I ignore what is the difference between L an AL (if there is any).

Could someone explain this.

• Please link to both data sheets. – Andy aka Jan 19 at 12:58
• @Andyaka Unfortunately, I haven't any datasheet otherwise it would have been enough to read them to find the answer. – AndreaF Jan 19 at 13:01
• Are you therefore suspecting that someone does have these data sheets then? – Andy aka Jan 19 at 13:02
• @Andyaka It's enough to find someone that has experience with the fuse code letters. The labeling is pretty standard for the glass fuses. – AndreaF Jan 19 at 13:05
• Who makes them then? – Andy aka Jan 19 at 13:06

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|


or

|Package size code| |Acting Speed| |Current rating| |Breaking capacity| |Voltage rating|


# Acting speed

The time it takes for the fuse to open when a fault current occurs. It code could be:

M - Medium Acting (Mitteltrage)

T - Slow Acting (Trage)

TT - Very Slow Acting (Trage Trage)

# Fuse Breaking Capacity

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