Siemens Diazed Bottle Fuses

Siemens DIAZED fuse system is one of the oldest fuse systems in the world.  It was developed by Siemens as far back as 1906. It is still the standard fuse system in many countries to this day. It is particularly widely used in the harsh environments of industrial applications.  Diazed Fuses, commonly called Bottle Fuses, are available in four sizes, NDz to 25 Amps, DII to 25 Amps, DIII to 63 Amps and DIV to 100 Amps with rated voltages from 500 to 750 V.  Diazed fuses are available with quick blow characteristic (5SA1, 5SB1, 5SB3, 5SC1), slow blow (5SA2) or standard gG line protection (5SB2, 5SB4, 5SC2).

Siemens DIAZED Bases (5SF1, 5SF4, 5SF5, 5SF6) must be fed from the bottom to ensure an insulated threaded ring when the fuse link is being removed. Reliable contact of the fuse links is only ensured when used together with DIAZED screw adapters (5SH3).  Fuse accessories are sized to match these five sizes. Each size fuse body has a different diameter to fit only into the appropriate Screw Cap and Fuse Base (5SH1).  A key feature is the high-performing EZR bus-mounting system for screw fixing. The busbars, which are particularly suited for bus-mounting bases, have a load capacity of up to 150 A with lateral infeed.

DIAZED stands for "DIAmetral gestuftes Zweiteiliges Sicherungssystem mit EDisongewinde" (diametral two-step fuse system with Edison screw).


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