Ceramic Fuse Markings

Fuses come in many types and sizes including glass fuses which may be slow blow fuses or fast acting fuses.

Ceramic fuse markings.

Contact us at 1 800 909 fuse 3873 to discuss your fuse. It s essential that you replace a blown fuse with another of the same type. For more information on other markings found on fuses see the fuses. The only embossed marking on multipart porcelain insulators is the typical but much larger o b used by ohio brass on its unipart styles.

5x20mm iec fuse marking. Element surface area to the glass ceramic absorption material. A ceramic fuse is built to withstand high temperatures. Please see the attached file.

Figure sf1 compares the multi layer design of our sff fuses with standard glass coated designs. I ve had a few enquiries about coloured bands on fuses and what value is denoted by the colours etc. The more thermally stable fuse is typically filled with sand in order to prevent the conductive film from forming. What is the fuse marking according to iec standard 127 and how does this translates to littelfuse s 5x20mm fuse offerings.

Where many people go wrong is confusing the continuous fusing rating where the fuse pops with the smaller rating of continuous amps which is where fuse operates normally. When the fuse elements open there is more material for the vaporizing fuse metals to absorb into resulting in a very efficient and effective quenching of the fuse arc. When replacing a lucas fuse with a non lucas glass type fuse you use the smallest rating for the new. If you want to know why you need a fuse or why to replace with the correct one see the fuses what and why page.

Fortunately few porcelain insulator styles u numbers have both dry process specimens with an embossed marking and wet process specimens with one of the other marking types. These are ceramic barrel fuses similar to the bosch style. The film is formed when a short circuit melts the fuse element causing a deposit to be seen on the inside of the fuse barrel as a film.