This page printed from:
panoptic.com/rking/Reading+Fuses

For Our King, Only

Recent Changes / Heat / History /Edit

Reading Fuses

This revision is from 2010/08/10 21:27. You can Restore it.

I had to scrounge some of this together from a Google search and a visit to the Wayback Machine, so here it is in one place:

Take, for example, "F800mAL250V"

F = "Fast Acting" (See below)

800mA = 800 milliamps (if you have to substitute, go lower)

L = General Application, Normal Blow. Protection of wiring

250V = 250 volts (if you have to substitute, I am pretty sure you want to go higher)

Electronic European Fuse Markings(Edit)

FF or UR Very Fast Acting, Semiconductor Protection Fuse
F Fast Acting Fuse
M Medium Acting Fuse
T or a Snail Shell Slow Acting Fuse
TT Very Slow Acting Fuse

Industrial European Fuse Markings(Edit)

(gL, gG, gB, gTr, gR, aM, aR)

First letter(Edit)

g Full Range
a Partial Range

2nd Letter(Edit)

L General Application, Normal Blow. Protection of wiring.
G General Application, Normal Blow.
B General Application, Normal Blow. Robust design for mining application.
Tr Transformer Protection.
R Very Fast Acting. Semiconductor Protection Fuse. What is the difference between aR and gR?

|M | Protection of electrical motors. Capable of withstanding motor starts.|