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
• 0.1 to 0.6 watts
• Tolerance to ±.01%
• 0.1 ohm to 3 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
Miniature printed circuit resistors incorporate an uncommon number of production and design refi nements 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 miniumum stress on high
temperature epoxy bobbins, permeated with a resilient inner cushion coat, and isolated from the external protection
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 fi rmly
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 suffi ciently well controlled for automatic insertion on standard grid
boards.
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, HR / 4000, PC Series
Radial Lead Precision
Wirewound Resistors
RB / RBR, HR / 4000, PC Series Issue November 2010 Sheet 1 of 3
• 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
* Discontinued by DSCC, replaced with 09008
** Approved to M and P level only
Electrical Specifi cations
IRC /
Shallcross Style
MIL-R-93 /
MIL-R-39005 Style
Wattage Resistance (ohms)
Maximum
Working Voltage
MIL Comm. MIL Comm.
125°C 85°C Min. Max. Max.
HR-8 RBR 71 0.125 0.1 150 K 300
4060 / PC8 RB 71 0.125 0.25 0.1 100 K 500 K 300
4065 RB 70 0.25 0.33 0.1 301 K 1.5 M 150
4061 --- --- 0.25 --- --- 800 K 300
HR 340 RBR 81* 0.100 10 250 K 300
HR 341 RBR 80** 0.100 10 120 K 150
Standard Lead Material - Tinned copper weld
Note: Optional temperature coeffi cients available. Consult factory for details.
Physical Dimensions (inches and (mm)):
IRC /
Shallcross Style
MIL-R-93 /
MIL-R-39005 Style
ABCDE
Inches (mm)
± 0.032 (± 0.8)
Inches (mm)
± 0.025 (± 0.6)
Inches (mm)
Minimum
Inches (mm)
± 0.002 (± 0.05)
Inches (mm)
± 0.010 (± 0.25)
HR-8 RBR 71 0.312 (7.9) 0.250 (6.3) 1.0 (25.4) 0.025 (0.6) 0.200 (5.0)
4060 / PC8 RB 71 0.312 (7.9) 0.250 (6.3) 1.0 (25.4) 0.025 (0.6) 0.200 (5.0)
4065 RB 70 0.500 (12.7) 0.375 (9.5) 1.0 (25.4) 0.032 (0.8) 0.200 (5.0)
4061 --- 0.375 (9.5) 0.250 (6.3) 1.0 (25.4) 0.025 (0.6) 0.200 (5.0)
HR 340* RBR 81 0.500 (12.7) 0.160 (4.0) 1.0 (25.4) 0.020 (0.5) 0.406 (10.3)
HR 341* RBR 80 0.325 (9.3) 0.160 (4.0) 1.0 (25.4) 0.020 (0.5) 0.225 (5.7)
A
Length
C
Lead Length
B
Diameter
D
Lead Diameter
E
Grid Spacing
A
Length
E
Grid Spacing
B
Diameter
C - Lead Length
Figure 1. (Round) Figure 1. (Round)
RB / RBR, HR / 4000, PC Series
Radial Lead Precision
Wirewound Resistors
RB / RBR, HR / 4000, PC Series Issue November 2010 Sheet 2 of 3
• 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
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
RB70 C 12601 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
RBR71 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
HR340
Commercial Product Description
(HR / 4000, PC)
2 24000 1 LF
RB / RBR, HR / 4000, PC Series
Radial Lead Precision
Wirewound Resistors
RB / RBR, HR / 4000, PC Series Issue November 2010 Sheet 3 of 3
