IBT Series
Carbon Composition Resistor
•
Meets performance standards of EIA RS-172
•
Hot molded process for product uniformity
•
Ideal for pulse-loaded handling
•
Non-inductive
design
Electrical Data
Tested Per MIL-STD-202
IBT 1/4
Power Rating
Determined by load life test 100% load @ 70°C ambient
Rated Continuous Working Voltage (RCWV)
Maximum Ambient Temperature
Resistors derated to zero load at this temperature
Nominal Resistance Range
Standard Resistance Tolerances
Dielectric Withstand Voltage
Atmospheric Pressure
Barometric pressure 3.4" Hg 115 millibars
Insulation Resistance
Voltage Coefficient of Resistance
% resistance change/volt at 10% and
100% RCWV for values 1K to 20 meg
Short-Time Overload
Apply 2.5 times RCWV at maximum
Indicated for 5 seconds
(min.)
(max.)
Maximum Voltage
Typical resistance change
Maximum resistance change
-.005%
-.032%
700V
±0.5%
±2%
-.005%
-.032%
700V
±0.5%
±2%
-.005%
-.032%
700V
±0.5%
±2%
(min.)
500V
325V
10,000 meg
700V
450V
10,000 meg
1000V
650V
10,000 meg
1/4W
P x R or 250 volts
whichever is less
IBT 1/2
1/2W
P x R or 350 volts
whichever is less
IBT 1
1W
P x R or 500 volts
whichever is less
±130°C
1Ω - 5.6 megΩ
±5%, ±10%
±130°C
1Ω - 20 megΩ
±5%, ±10%
±130°C
2.2Ω - 1 megΩ
±10%
General Note
IRC reserves the right to make changes in product specification 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
IBT Series Issue September 2010 Sheet 1 of 2
Wire and Film Technologies Division
• 4222 South Staples Street • Corpus Christi Texas 78411 USA
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com
IBT Series
Carbon Composition Resistor
Resistance Temperature Characteristics
Resistance Range
under 1K
Maximum percent resistance
change from room temperature
(+25°C) value
1K to 9.1 K
10K to 91K
100K to 910K
1 meg to 10 meg
-55°C
+2.0 to +5.0
+5.0 to +9.0
+8.0 to +11.0
+10.0 to +14.0
13.0 to +20.0
-105°C
-4.0 to -2.0
-5.0 to -3.0
-7.0 to -5.0
-9.0 to -7.0
-14.0 to -9.0
Physical Data
A
B
A
D
PACKAGING:
5000/reel
1000/bulk
C
Dimensions (Inches and (mm))
IRC Type
IBT 1/4
IBT 1/2
IBT 1
A
1.18 ± 0.12
(30.00 ± 3.0)
1.1 ± 0.12
(28.00 ± 3.0)
1.02 ± 0.12
(26.00 ± 3.0)
B
0.248 ± 0.028
(6.3 ± 0.70)
0.374 + 0.032 / -0.028
(9.50 + 0.80 / -0.70)
0.56 ± 0.03
(14.3 ± 0.7)
C
0.024 ± 0.002
(0.60 ± 0.05)
0.0275 ± 0.002
(0.70 ± 0.05)
0.04 ± 0.002
(0.9 ± 0.05)
D
0.094 ± 0.004
(2.40 ± 0.10)
0.142 ± 0.008
(3.6 ± 0.20)
0.22 ± 0.01
(5.7 ± 0.3)
Ordering Data
Sample Part No.
IRC Type
(IBT1/4, IBT1/2, or IBT1)
IBT1
203
J
LF
LTR
Resistance Value
(First two significant figures plus third digit multiplier)
Example: 223 = 22 KΩ
510 = 51
Ω
2R0 = 2.0
Ω
Tolerance
J = ±5.0% K = ±10%
LF
Provides clear "Lead Free" Designation
Packaging Type
Lead Tape = LTR
Bulk = Blank
Wire and Film Technologies Division
• 4222 South Staples Street • Corpus Christi Texas 78411 USA
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com
IBT Series Issue September 2010 Sheet 2 of 2
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