The FRW Series is designed for vertical or horizontal mounting, either singly or in stacks. Non-magnetic mounting brackets extending through the resistor allow easy
and economical mounting. They also aid heat distribution along its entire length and serves as conductors to transfer internal heat to the chassis.
Other features of the FRW Series are lightweight construction, combined with
exceptional mechanical strength, and the ability to withstand severe vibration.
Designed to fulfill requirements of high wattage dissipation in limited-space applications, the FRW Flat Wire Wound Resistor has a higher power to
space ratio than standard tubular wire wounds. For different operating conditions, these compact resistors are available in two coatings, "D Coat" or "C Coat".
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.
Standard tolerance is 5%,(50 ohm and above) 10% below. Tolerances as low as 1.0% can be supplied. Further details on application.
Adjustable resistors are available within the maximum resistance range for each type,
as shown in the chart.
Tapped resistors may be supplied
within the limitations of the resistor size used. The use of a tap results in a small reduction in power rating and ohmage available, since winding space is lost.