A complete range of power Wire Wound Resistors from 3 watts to 1500 watts is available with the exclusive PYROSIL D Coating. Proven after extensive
field testing to provide long, trouble free performance under most operating conditions, PYROSIL coating offers the following features:
* Low temperature cured - no limitations on wire specifications.
moisture - minimises the effect of high humidity conditions.
* Resists chipping - for mechanical robustness.
* Unaffected by most common solvents - for resistance to environmental attack.
* Withstands temperatures over 10000C - resistor can absorb a short time overload of 5 times rated load.
PYROSIL D COAT is a unique combination of silicone resins and refactory oxidation barriers designed particularly for high temperature operation. It is
capable of withstanding temperatures corresponding to five times rated load.
TROPICAL C COAT is a specially developed silicone coat for the worst conditions encountered, such as on shipboard, in tropical countries
and humid climates. Power rating in watts shown in the table should not be exceeded for full protection against moisture over the lifetime of the resistor.
Standard tolerance 5% 50 ohms and above, 10% below. Tolerances as low as 1.0% can be supplied.
Further details on application.
resistors are available within the maximum resistance range for each type, as shown in the table.
Tapped resistors may be supplied within the limitaions of the resistor size used. The use of a tap results in a small reduction in power rating and resistance
available, since winding space is lost..