PRECISION WIREWOUND PRINTED CIRCUIT
BOARD & RADIAL LEAD RESISTOR
ISO-9001
Registered
Welded Terminations
Wire terminations
made at top of resistor
-Protects joints from
solder bath damage
-Body acts as heat sink
providing additional
termination protection
PC, HR, 4000 SERIES
MIL-R-93 (RB) & MIL-R-39005 (RBR)
& COMMERCIAL STYLES
Custom designs
available
Insulated stress relieved
windings
Optional lead materials
Different lead spacing
furnished on request
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•
•
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0.100 to 0.600 watts
Tolerance to ±0.01% (25°C)
Non-inductive windings available
TC's from ±2 ppm/°C to +6000 ppm/°C
Meets or exceeds all applicable MIL-R-93 & MIL-R-39005 ratings
Miniature printed circuit resistors incorporate an
uncommon number of production and design
refinements to assure excellent resistance stability,
close resistance tolerances, low TCR capabilities and
high structural strength. To assure their high quality
standards, premium grade selected wire is reverse pi
wound with minimum stress on high temperature
epoxy bobbins, permeated with a resilient inner
cushion coat, and isolated from the external
protective shell by a special dry air chamber.
To promote additional resistance stability and accurate
initial calibrations all resistors are subjected to an
extensive accelerated aging program. Weldable and/
or solderable leads (a choice of lead material is
available) are firmly anchored and bonded inside the
bobbin for maximum structural strength. All resistor
markings are impervious to printed circuit board
cleaning solvents and lead spacing is sufficiently well
controlled for automatic insertion on standard grid
boards.
SPECIAL SCREENING / ACCEPTANCE TEST:
Special tests can be performed on a 100% or sample basis, to meet individual customer requirements.
Some of the available non-destructive test include:
-Short Time Overload
-Thermal Shock
-Temperature Coefficient of Resistance
-Radiographic Inspection
Each of these tests is designed to detect a spectrum of potential resistor defects. Consult the factory for
recomendations and a quotation on special screening or acceptance tests to meet your needs.
ELECTRICAL SPECIFICATIONS:
IRC/Shallcross
Style**
HR-8
4060/PC8
4065
4061
4067
HR 340
HR 341
MIL-R-93/
MIL-R-39005
Style
RBR71
RB71
RB70
----RBR81
RBR80
Wattage
MIL
125°C
0.125
0.125
0.250
----0.100
Comm*
85°C
0.100
0.250
0.333
0.250
0.400
Resistance (ohms)
MIL
Comm*
Max
Max
150K
500K
100K
1.5M
301K
800K
--3M
--250K
120K
Maximum
Working
Voltage
300
300
150
300
300
300
150
*Commercial ratings may be applied at 125°C provided 175°C max. operation temperature is permissible. **Available as High Reliability styles with complete documentation.
WIREWOUND AND FILM TECHNOLOGIES DIVISION
736 Greenway Road • Boone, North Carolina 28607-1860 • Tel: 828-264-8861 • Fax: 828-264-8866 • www.irctt.com
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