din 43650 connectors pdu
din 43650 connectors
din 43650 connectors


DIN 43650 Connectors
VDE Approved DIN Solenoid Connectors
Fuse Constrution
Power Distribution Units - PDUs
Elico Professional Grade Toggle Switches
Understanding RFI / EMI Line Filters
EMI / RFI Line Filter Parameters
Filter Selection Guidelines
Elcom PDUs / Elcom Power Distribution Units

Fuse Constrution

A glass fuse consists of an element which is enclosed in the fuse body and the element is either welded or soldered to the fuse caps. The element is a conductor and the material, mass and the configuration of the element decides the rating type of the glass fuse.  In case of ceramic fuses there is a ceramic filling between the fuse element and the body or the ceramic filler itself acts as the body.

When current passes through the element, it generates heat. This heat is transferred to the atmosphere and the heat is reduced. In case where the filler is used, as in ceramic fuses, the heat is absorbed by the filler and then transferred to the surrounding atmosphere. This effectively  transfers small overloads harmlessly.
When the overload is continues, the heat generated is more that can be absorbed by the filler or the air surrounding it and in this case the element heats up to its melting point and opens. Under short circuit conditions the small cross section of the element quickly reaches the melting point.
Higher the applied current faster is the time for fuse to heat and reach its melting point, i.e. fuses have an inversely propositional time current characteristic. This characteristic makes fuses a desirable product for selection in the instrument design.

Reliance fuses are available in glass as well as ceramic body. The glass fuses  are available in two sizes on 5 x 20 glass fuse and 6.3 X 32 glass fuse. Both sizes are available in fast blow or the slow blow variants.