CARBON COMPOSITION
RESISTOR
ISO-9001
Registered
Molded Body
IBT
SERIES
•
Meets performance standards of EIA RS-172
•
Hot molded process for product uniformity
•
Ideal for pulse-load handling
Molded Composition Elements
Tinned Leads
PERFORMANCE CHARACTERISTICS (TESTED PER MIL-STD-202):
ELECTRICAL
POWER RATING
Determined by load life test 100% load at 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 20meg
SHORT-TIME OVERLOAD
Apply 2.5 times RCWV at maximum
Indicated for 5 seconds
(min.)
(min)
(max.)
Maximum voltage
Typical resistance change
Maximum resistance change
IBT 1/4
1/4W
√PxR
or 250 volts
whichever is less
± 130°C
1Ω - 5.6 megΩ
±5%, ±10%
500V
325V
10,000 meg
-.005%
-.032%
700V
±0.5%
±2%
IBT 1/2
1/2W
√PxR
or 350 volts
whichever is less
± 130°C
1Ω-20 megΩ
±5%, ±10%
700V
450V
10,000 meg
-.005%
-.032%
700V
±0.5%
±2%
RESISTANCE TEMPERATURE CHARACTERISTICS:
Maximum percent resistance
change from room tempera-
ture (+25°C) value
Resistance Range
under 1K
1K to 9.1K
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
DIMENSIONS (Inches and (mm)):
A
B
A
D
PACKAGING:
5000/reel
1000/bulk
C
IRC Type
IBT 1/4
IBT 1/2
A
1.102±0.032
(28.00±0.80)
1.024±0.032
(26.00±0.80)
B
0.248±0.028
(6.3±0.70)
0.374+0.032/-0.028
(9.50+0.80/-0.70)
C
0.024±0.002
(0.60±0.05)
0.0275±0.002
(0.70±0.05)
D
0.094±0.004
(2.40±0.10)
0.142±0.008
(3.6±0.20)
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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