General Note
IRC reserves the right to make changes in product specifi cation without notice or liability.
All information is subject to IRC’s own data and is considered accurate at time of going to print. A subsidiary of
TT electronics plc
• 4222 South Staples Street • Corpus Christi Texas 78411 USA
Wire and Film Technologies Division
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com
RB / RBR, VA / HR, SP / 7000 Series
Axial Lead Precision
Wirewound Resistors
• 0.1 to 1.0 watts
• Tolerance to ±.01%
• 0.1 ohm to 12 meg ohms
• Approved to M, P, & R levels
• TCR’s from ±2 ppm/°C to +6000 ppm/°C
• Meets or exceeds all applicable MIL-R-93 & MIL-R-39005 ratings
The RB/RBR ultra precision resistors are designed and produced for critical parameter applications. They are available
for established reliability military and/or commercial applications requiring state of the art precision and stability.
Construction features may vary slightly between commercial and military styles, but both are produced under the same
rigid quality control system required by the tightest military specifi cations. Both are produced in the same production
line using the same highly trained operators required to produce the established reliability product.
All terminations are welded to reduce contact noise and thermal EMF. Extensive accelerated aging programs both
before and after calibration assure precise initial accuracy and high resistance stability.
Encapsulation is accomplished by a unique dry air chamber epoxy shell technique for established reliability parts. A
resilient inner coating is used to minimize internal stresses on all parts.
All resistors (military and commercial) are carefully monitored during assembly, winding, coating, and stabilization
procedures to assure high quality standards. Premium grade selected wire is control- stress wound on special designed
bobbins. Established reliability military parts are then burned in for 100 hours at 125°C ambient as part MIL-R-93, or
equivalent, of group A acceptance testing. Documentation and special tests are available upon customer request to
meet your unique requirements.
TCR and Temperature Data
Style Resistance Range (Ω) Absolute TCR (ppm/°C) Operating Temperature Range (°C)
All
Styles
0.1 - 0.9
1.0 - 9.9
10 - 99.9
100 - 12M
±90
±30
±15
±10
-65 to +145
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 tests include:
Each of these tests is designed to detect a spectrum of potential resistor defects. Consult the factory for recommendations
and a quotation on special screening or acceptance tests to meet your needs.
Short Time Overload•
Thermal Shock•
Mechanical Shock•
Vibration•
Temperature Coeffi cient of Resistance•
Radiographic Inspection•
RB/RBR, VA/HR, SP/ 7000 Series Issue August 2011 Sheet 1 of 4
• 4222 South Staples Street • Corpus Christi Texas 78411 USA
Wire and Film Technologies Division
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com
Electrical Data
*For all styles, commercial ratings may be applied at 125°C provided 175°C max. Operating temperature is permissible. **Customer must specify TCR required.
NOTE: Contact factory for availablility of other styles and sizes of above product.
RB / RBR, VA / HR, SP / 7000 Series
Axial Lead Precision
Wirewound Resistors
MIL-R-93
Style IRC
Style
Shallcross
Style
Wattage Resistance (ohms) Max.
Working
Voltage
(Comm.)
Mil Comm Mil Comm
125°C 85°C Min Max Max
RB52 7040 VA36 0.50 1.00 0.1 1M 12M 750
RB53 7030 VA34 0.33 0.66 0.1 604K 8M 500
RB54 7020 VA14 0.25 0.50 0.1 226K 4.4M 300
RB55 7010 VA12 0.15 0.33 0.1 176K 3M 300
RB56 7009 VA10 0.125 0.250 0.1 127K 1.4M 200
MIL-R-39005
RBR52 HR36 --- 0.50 1.00 0.1 1.2M 3M 750
RBR53 HR34 --- 0.33 0.66 0.1 1.1M 3M 500
RBR54 HR14 --- 0.25 0.50 0.1 526K 2M 300
RBR55 HR12 --- 0.15 0.30 0.1 332K 1M 300
RBR56 HR10 --- 0.125 0.250 0.1 220K 840K 200
SUBMINIATURES
--- 7004 --- --- 0.05 --- --- 250K 150
--- 7005 SP41 --- 0.10 --- --- 300K 150
--- 7006 --- --- 0.10 --- --- 350K 200
--- 7007 SP21 --- 0.250 --- --- 700K 300
--- --- SP42 --- 0.125 --- --- 200K 200
RB/RBR, VA/HR, SP/ 7000 Series Issue August 2011 Sheet 2 of 4
• 4222 South Staples Street • Corpus Christi Texas 78411 USA
Wire and Film Technologies Division
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com
Physical Data
RB / RBR, VA / HR, SP / 7000 Series
Axial Lead Precision
Wirewound Resistors
A
Length
1.5 Min.
Lead Length
C
B Dia.
Dimensions (Inches (mm))
MIL-R-93
Style IRC
Style
Shallcross
Style CBA
RB52 7040 VA36 1.00 ± 0.032
(25.4 ±)
0.375 ± 0.015
(9.5 ±)
0.032 ± 0.002
(0.8 ±)
RB53 7030 VA34 0.750 ± 0.032
(19.0 ±)
0.375 ± 0.015
(9.5 ±)
0.032 ± 0.002
(0.8 ±)
RB54 7020 VA14 0.750 ± 0.032
(19.0 ±)
0.250 ± 0.015
(6.3 ±)
0.032 ± 0.002
(0.8 ±)
RB55 7010 VA12 0.500 ± 0.032
(12.7 ±)
0.250 ± 0.015
(6.3 ±)
0.032 ± 0.002
(0.8 ±)
RB56 7009 VA10 0.343 ± 0.032
(8.7 ±)
0.250 ± 0.015
(6.3 ±)
0.032 ± 0.002
(0.8 ±)
MIL-R-39005
RBR52 HR36 --- 1.00 ± 0.032
(25.4 ±)
0.375 ± 0.015
(9.5 ±)
0.032 ± 0.002
(0.8 ±)
RBR53 HR34 --- 0.750 ± 0.032
(19.0 ±)
0.375 ± 0.015
(9.5 ±)
0.032 ± 0.002
(0.8 ±)
RBR54 HR14 --- 0.750 ± 0.032
(19.0 ±)
0.250 ± 0.015
(6.3 ±)
0.032 ± 0.002
(0.8 ±)
RBR55 HR12 --- 0.500 ± 0.032
(12.7 ±)
0.250 ± 0.015
(6.3 ±)
0.032 ± 0.002
(0.8 ±)
RBR56 HR10 --- 0.343 ± 0.032
(8.7 ±)
0.250 ± 0.015
(6.3 ±)
0.032 ± 0.002
(0.8 ±)
SUBMINIATURES
--- 7004 --- 0.30 ± 0.032
(7.6 ±)
0.10 ± 0.015
(2.5 ±)
0.020 ± 0.002
(0.5 ±)
--- 7005 SP41 0.25 ± 0.032
(6.3 ±)
0.125 ± 0.015
(3.2 ±)
0.025 ± 0.002
(0.6 ±)
--- 7006 --- 0.31 ± 0.032
(7.9 ±)
0.125 ± 0.015
(3.2 ±)
0.025 ± 0.002
(0.6 ±)
--- 7007 SP21 0.375 ± 0.032
(9.5 ±)
0.188 ± 0.015
(4.8 ±)
0.025 ± 0.002
(0.6 ±)
--- --- SP42 0.375 ± 0.032
(9.5 ±)
0.125 ± 0.015
(3.2 ±)
0.025 ± 0.002
(0.6 ±)
RB/RBR, VA/HR, SP/ 7000 Series Issue August 2011 Sheet 3 of 4
• 4222 South Staples Street • Corpus Christi Texas 78411 USA
Wire and Film Technologies Division
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com
Ordering Data
Sample Part No.
Style
Terminal
C = Solderable, W = Weldable
TCR Code
E = Standard
Resistance
Example: 12,600 ohms = 12601
Tolerance
T = 0.01%, Q = 0.02%, A = 0.05%, B = 0.1%, C = 0.25%, D = 0.5%
RB Product Description
RB52 C 12601E B
Sample Part No.
Style
Terminal
L = Solderability, U = Weldable
Resistance
Example: 12,600 ohms = 12601
Tolerance
T = 0.01%, Q = 0.02%, A = 0.05%, B = 0.1%, C = 0.25%, D = 0.5%
Failure Rate
RBR Product Description
RBR52 L 12601 B R
Sample Part No.
Style
TCR (ppm)
Omit if Standard
Resistance
2.4 kohm (2400 ohm)
Tolerance
T = 0.01%, Q = 0.02%, A = 0.05%, B = 0.1%, C = 0.25%, D = 0.5%
RoHS Indictator
LF = Indicates RoHS compliance
VA10
Commercial Product Description
(VA / HR, SP / 7000)
2 24000 1 LF
RB / RBR, VA / HR, SP / 7000 Series
Axial Lead Precision
Wirewound Resistors
RB/RBR, VA/HR, SP/ 7000 Series Issue August 2011 Sheet 4 of 4
