1
ISO-9001
Registered
150K
100K
301K
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250K
120K
0.250
0.333
0.250
0.400
IRC/Shallcross
Style**
Maximum
Working
Voltage
RBR71
RB71
RB70
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RBR81
RBR80
MIL-R-93/
MIL-R-39005
Style
PRECISION WIREW OUND PRINTED CIRCUIT
BOARD & RADIAL LEAD RESISTOR
PC, HR, 4000 SERIES
MIL-R-93 (RB) & MIL-R-39005 (RBR)
& COMMERCIAL STYLES
• •
• •
• 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. W eldable and/
or solderable leads (a choice of lead material is
av ailable) 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.
MIL
125°C Comm*
85°C MIL
Max Comm*
Max
SPECIAL SCREENING / A CCEPTANCE TEST:
Special tests can be performed on a 100% or sample basis, to meet individual customer requirements.
Some of the av ailab le non-destructiv e test include:
-Short Time Overload -Temperature Coefficient of Resistance
-Thermal Shock -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: Wattage Resistance (ohms)
HR-8
4060/PC8
4065
4061
4067
HR 340
HR 341
0.125
0.125
0.250
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0.100
0.100
500K
1.5M
800K
3M
300
300
150
300
300
300
150
W elded Terminations
Wire terminations
made at top of resistor
-Protects joints from
solder bath damage
-Body acts as heat sink
providing additional
termination protection
Custom designs
available
Insulated stress relieved
windings
Optional lead materials
Different lead spacing
furnished on request
*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 • Fa x: 828-264-8866 • www.irctt.com
2
ISO-9001
Registered
IRC
Shallcross
Style
HR-8
4060/PC-8
4065
4061
4067
HR 340*
HR341*
C
Inches (mm)
Minimum
1.0 (25.4)
1.0 (25.4)
1.0 (25.4)
1.0 (25.4)
1.5 (38.0)
1.0 (25.4)
1.0 (25.4)
A
Inches (mm)
±0.032 (±0.8)
0.312 (7.9)
0.312 (7.9)
0.500 (12.7)
0.375 (9.5)
0.437 (11.1)
0.500 (12.7)
0.325 (9.3)
PC, HR, 4000 SERIES DIMENSIONS (Inches and (mm)):
B
Inches (mm)
±0.025 (±0.6)
0.250 (6.3)
0.250 (6.3)
0.375 (9.5)
0.250 (6.3)
0.437 (11.1)
0.160 (4.0)
0.160 (4.0)
D
Inches (mm)
±0.002 (±0.05)
0.025 (0.6)
0.025 (0.6)
0.032 (0.8)
0.025 (0.6)
0.032 (0.8)
0.020 (0.5)
0.020 (0.5)
E
Inches (mm)
±0.010 (±0.25)
0.200 (5.0)
0.200 (5.0)
0.200 (5.0)
0.200 (5.0)
0.300 (7.8)
0.406 (10.3)
0.225 (5.7)
HOW TO ORDER
Sample Par t No.:
RB71 W E 10001 B
Style
(Use commercial style if no MIL number)
Characteristic & T erminal
RB product: C = Solderable, W = Weldable
RBR product: L=Solderable, U=Weldable
Resistance Temperature
Characteristic
Resistance
Tolerance For commercial equivalents:
Style - Resistance - Tolerance - TCR
Standard Temperature Coefficient ±10ppm/°C 100Ω up, ±15ppm/°C 10Ω to 100Ω, ±30ppm/°C 1Ω to 10Ω, ±90ppm/°C below 1Ω.
Standard Lead Material - Tinned copper weld NOTE: Optional temperature coefficients available. Consult factory for details.
B
A
Length
C
Lead Length
D
E Grid Spacing
A
Length
C
Lead Length
E Grid Spacing
B Diameter
*Fig. II (Radial)Fig. I (Round)
Diameter
WIREWOUND AND FILM TECHNOLOGIES DIVISION
736 Greenway Road • Boone, North Carolina 28607-1860 • Tel: 828-264-8861 • Fa x: 828-264-8866 • www.irctt.com
