3NC2220

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SITOR cylindrical fuses protect power semiconductors from the effects of short-circuits because the super quick-response disconnect characteristic is far quicker than that of conventional fuses. They protect expensive devices and system components such as solid-state contactors, electronic relays (solid state), converters with fuses in the input and in the DC link, UPS systems and soft starters for motors up to 100В A.

The cylindrical design is approved for industrial applications. The cylindrical fuse links comply with IECВ 60269.

Cylindrical fuse holders also comply with IECВ 60269 and ULВ 512. The cylindrical fuse holders for 10В xВ 38В mm and 14В xВ 51В mm have been tested and approved as fuse switch disconnectors and the cylindrical fuse holders for 22В xВ 58 mm as fuse disconnectors according to the switching device standard IECВ 60947-3. The utilization category and the tested current and voltage values are specified in the Table "Technical Specifications".

The cylindrical fuse holders have been specially developed for the application ofВ SITORВ fuse links with regard to heat tolerance and heat dissipation and are therefore not recommended for standard applications.

Cylindrical fuse bases do not offer the same comprehensive touch protection as the fuse holders, but have better heat dissipation. The single-pole cylindrical fuse bases for 14В xВ 51В mm and 22В xВ 58В mm allow modular expansion to multipole bases.