Carbon Composition Resistors
Type CBT Series
Type CBT Series
Characteristics -
Electrical
CBT25
Power at 70°C Ambient:
Maximum Voltage:
Resistance Range:
Resistance Values:
Voltage Coefficient:
Limiting Element Voltage:
Maximum Overload Voltage:
The CBT series of resistors is
constructed utilising solid carbon
composition, which is the traditional
medium for absorbing high energy
pulses, in cases of high inrush current.
These resistors have evolved over
many years to have excellent pulse
withstand capabilities, whilst remaining
very
stable.
These
improved
characteristics have been achieved by
prudent selection of materials of
optimum physical properties and
by advances in the manufacturing
process.
CBT50
0.5 Watts Derating to 0 at +125°C
350 Volts
1R0 - 22M
± 0.035%/V
350 Volts
700 Volts
1000 M minimum
0.25 Watts Derating to 0 at +125°C
250 Volts
1R0 - 5M6
± 0.035%/V
250 Volts
400 Volts
5% E24 Series 10% E12 Series 20% E6 Series
Insulation Resistance:
Characteristics -
Environmental
Operating Temperature Range:
Temperature Cycles:
(-55°C to +125°C, 5 cycles)
Load Life (1000 hours at 70°C):
Resistance to Solder Heat:
(350°C for 3 seconds)
Short Time Overload:
(2.5 x Rated Power for 5 seconds)
Humidity (40°C, 95%RH, 240 hrs):
-55°C to +125°C
∆R/R
± 2%
∆R/R
± 10%
∆R/R
± 3%
∆R/R
± 2%
∆R/R
± 3%
Dimensions-
Key Features
I
I
I
I
I
I
I
Designed for Pulse Withstand
Range of Resistance
Tolerances
Solid Carbon Composition
Low Cost, High Performance
Two Sizes Available
Wide Range of Resistance
Values
Supplied Ammo Pack in
boxes of 2000
Style
CBT25
CBT50
L
6.3 ± 0.7
9.5±0.8
D
2.4 ± 0.1
3.6±0.2
l
27 min.
25 min.
d
0.6
0.7
Pulse Withstand Characteristics
Charging and Discharging a 2000 pF Capacitor for 100 Cycles
10
0
a
-10
-20
-30
CBT25
a: 1.2MΩ
b: 33kΩ
c: 1kΩ
0
2
4
6
8
10
c
b
∆R/R(%)
∆R/R(%)
-10
-20
-30
CBT50
a: 1.2MΩ
b: 10kΩ
c: 1kΩ
0
2
4
6
8
10
12
14
c
10
0
a
b
12
14
Voltage (kv)
Voltage (kv)
How to Order
CBT
Common Part
Carbon Composition
Resistor
25
Size
25 - 0.25W
J
Tolerance
J - ±5%
K - ±10%
10K
Resistance Value
1 ohm
(1 ohm) 1R0
1K ohm
(1000 ohms) 1K
100K ohm
(100000 ohms) 100K
1M ohm
(1000000 ohms) 1M
50 - 0.5W
M - ±20%
Literature No. 1773192
Issued: 12-05
Dimensions are shown for
reference purposes only.
Dimensions are in millimetres
unless otherwise specified.
Specifications subject to
change.
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