BWF-Series – an alternative for resistor - fuse - combinations

This series has been specially developed, to offer an alternative for resistor-fuse-combinations.
Priority was given to the ability, to withstand and limit high rush-in current without fusing and, at the same time, to provide a fusing-characteristic for a wide load-range.
Inflammation must not appear at all and short-circuit must be avoided, also if the overload condition is repeated after fusing.

BWF-series complies with these requirements to the utmost possible extend and is therefore in use in safety-relevant applications for years.
Resistive wire is wound onto a fibreglass-core.

The resistive element is sub-assembled with a special varnish to protect from inflammation

The winding-parameter are chosen to ensure safe reproducibility of “fusing-time versus load” characteristics, what is significantly different from fusible film-resistors, which allow wide tolerances for their fuse-characteristics.

The resistive element is sub-assembled with caps and terminal-wires and conformally coated with a special varnish to protect from inflammation.
The sub-assembly then is moulded in "bakelite"-resin.

Being kind of a heat-sink, the mould-jacket is important for the fuse-characteristics and it also provides full electrical insulation.
All specified parameter are valid through the resistance-range from 0R1 to 1K0.

Download datasheet BWF-Series

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