Carbon Composition Resistors
Type CBT Series
Key Features
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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
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.
Characteristics - Electrical
CBT25
Power at 70°C Ambient:
Maximum Voltage:
Resistance Range:
Resistance Values:
Voltage Coefficient:
Limiting Element Voltage:
Maximum Overload Voltage:
Insulation Resistance:
0.25 Watts Derating to 0 at +125°C
250 Volts
1R0 - 5M6
± 0.035%/V
250 Volts
400 Volts
1000 M minimum
CBT50
0.5 Watts Derating to 0 at +125°C
350 Volts
1R0 - 22M
± 0.035%/V
350 Volts
700 Volts
5% E24 Series 10% E12 Series 20% E6 Series
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
ΔR/R ± 2%
ΔR/R ± 10%
ΔR/R ± 3%
ΔR/R ± 2%
ΔR/R ± 3%
1773192 CIS BI 12/2011
Dimensions are in millimeters
and inches unless otherwise
specified. Values in brackets
are standard equivalents.
Dimensions are shown for
reference purposes only.
Specifications subject
to change.
For email, phone or live chat, go to:
te.com/help
Carbon Composition Resistors
Type CBT Series
Dimensions
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
ΔR/R(%)
-10
-20
-30
CBT25
a: 1.2MΩ
b: 33kΩ
c: 1kΩ
0
2
4
6
8
10
c
b
ΔR/R(%)
a
10
0
-10
-20
-30
CBT50
a: 1.2MΩ
b: 10kΩ
c: 1kΩ
0
2
4
6
8
10
12
14
c
a
b
12
14
Voltage (kv)
Voltage (kv)
How to Order
CBT
Common Part
25
Size
J
Tolerance
J - ±5%
Carbon Composition
Resistor
25 - 0.25W
K - ±10%
50 - 0.5W
M - ±20%
10K
Resistance Value
1 ohm
(1 ohm) 1R0
1K ohm
(1000 ohms) 1K
100K ohm
(100000 ohms) 100K
1M ohm
(1000000 ohms) 1M
TE Connectivity, TE connectivity (logo) and TE (logo) are trademarks.
Other logos, product and Company names mentioned herein may be trademarks of their respective owners.
While TE has made every reasonable effort to ensure the accuracy of the information in this datasheet, TE does not guarantee that it is error-free, nor does TE make any other
representation, warranty or guarantee that the information is accurate, correct, reliable or current. TE reserves the right to make any adjustments to the information contained herein
at any time without notice. TE expressly disclaims all implied warranties regarding the information contained herein, including, but not limited to, any implied warranties of merchantabili-
ty or fitness for a particular purpose. The dimensions in this datasheet are for reference purposes only and are subject to change without notice. Specifications are subject to change
without notice. Consult TE for the latest dimensions and design specifications.
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