Some knowledge about electronical fuses

Article from Wikipedia http://en.wikipedia.org/wiki/Fuse_%28electrical%29

Fuse bible from The fuse warehouse http://www.thefusewarehouse.com/frames/fuses_options_index.html 

“1. Electronic European Fuse Markings from the Fuse Warehouse

Marking Fuse Element Characteristic
FF or UR Very Fast Acting, Semiconductor Protection Fuse
F Fast Acting Fuse
M Medium Acting Fuse
T or Slow Acting Fuse
TT Very Slow Acting Fuse
L Low Breaking Capacity
H High Breaking Capacity

2. Industrial European Fuse Markings from the Fuse Warehouse

Marking: gL, gG, gB, gTr, gR, gRL, aM, aR

1st Letter

Fuse Breaking Capacity

g

Full Range

a

Partial Range

2nd Letter

Fuse Element Characteristic

B

General Application, Robust design for mining application.

G

General Purpose, Cable & Line Protection.

L

General Purpose, Cable & Line Protection.

M

Protection of electrical motors. Capable of withstanding motor starts.

R

Very Fast Acting. Semiconductor Protection.
What is the difference between aR and gR?

RL

Very Fast Acting. Semiconductor Protection & Line Protection.

Tr

General Purpose, Transformer Protection.

 3. Approval Markings from the Fuse Warehouse

Australian Standards Association (AS)

British Electrical Approval Board (BEAB)

British Standards Institution Kitemark (BSI)

Canadian Standards Assocation (CSA)

Canadian Standards Assocation (CSA - USA approved)

China Compulsory Certification Scheme

Equipment complies with Council of the European Union (CE)

Committee for Electrotechnical Belgium European Community (CEBEC)

CENELEC Electronic Components Committee (CECC)

Conformity Certfication of Electrical Equipment (China - CCEE)

Dansk Elmateriel Kontrol (Denmark - DEMKO)

Deutshes Institut fur Normung (DIN)

Finnish Electrical Safety Development Association (Finland - FIMKO)

Instituto ltaliano del Marchio di Qualitä (Italy)

International Electrotechnical Commission (IEC)

Korean Testing Labratories

MITI (Japan) - now know as METI .. see below

Ministry of Economy, Trade & Industry (Japan - METI)

Ministry of Defence (UK - MOD)

Keuring van Electrotechnische Materialen (Netherlands - KEMA)

Issued by LCIE on behalf of AFNOR (France - NF)

Norges Elektriske Materiellkontroll (Norway - NEMKO)

Osterreichischner Verband fur Elektrotechnik (Austria - OVE)

Society of Automotive Engineers (SAE)

Svenska Elektriska Materielkontrollanstalten (Sweden - SEMKO)

Schweizerischer Elektrotechnisher Verein (Switzerland - SEV)

Technischer Uberwachungs-Verien (Germany - TUV)

Underwriters Laboratories (Listed - Canada)

Underwriters Laboratories (Listed - USA)

Underwriters Laboratories (Recognised - Canada)

Underwriters Laboratories (Recognised - USA)

Universal Modular Fuse-Links (UMF)

Verband Deutscher Electrotechniker (Germany - VDE)

RoHS Image

Restriction of Hazardous Substances (refer environment page)”

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