Carbon Composition Resistors
Type CBT Series
1773192 CIS BI 12/2011 Dimensions are in millimeters Dimensions are shown for For email, phone or live chat, go to: te.com/help
and inches unless otherwise reference purposes only.
specified. Values in brackets Specifications subject
are standard equivalents. to change.
Key Features
IDesigned for Pulse
Withstand
IRange of Resistance
Tolerances
ISolid Carbon Composition
ILow Cost, High Performance
ITwo Sizes Available
IWide Range of Resistance
Values
ISupplied 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
Characteristics - Environmental
Operating Temperature Range: -55°C to +125°C
Temperature Cycles: ΔR/R ± 2%
(-55°C to +125°C, 5 cycles)
Load Life (1000 hours at 70°C): ΔR/R ± 10%
Resistance to Solder Heat: ΔR/R ± 3%
(350°C for 3 seconds)
Short Time Overload: ΔR/R ± 2%
(2.5 x Rated Power for 5 seconds)
Humidity (40°C, 95%RH, 240 hrs): ΔR/R ± 3%
CBT25 CBT50
Power at 70°C Ambient: 0.25 Watts Derating to 0 at +125°C 0.5 Watts Derating to 0 at +125°C
Maximum Voltage: 250 Volts 350 Volts
Resistance Range: 1R0 - 5M6 1R0 - 22M
Resistance Values: 5% E24 Series 10% E12 Series 20% E6 Series
Voltage Coefficient: ± 0.035%/V ± 0.035%/V
Limiting Element Voltage: 250 Volts 350 Volts
Maximum Overload Voltage: 400 Volts 700 Volts
Insulation Resistance: 1000 M minimum
Carbon Composition Resistors
Type CBT Series
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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.
Dimensions
Style L D l d
CBT25 6.3 ± 0.7 2.4 ± 0.1 27 min. 0.6
CBT50 9.5±0.8 3.6±0.2 25 min. 0.7
Pulse Withstand Characteristics
Charging and Discharging a 2000 pF Capacitor for 100 Cycles
0 2 4 6 8 10 12 14
Voltage (kv)
10
0
-10
-20
-30
ΔR/R(%)
a
b
c
CBT25
a: 1.2MΩ
b: 33kΩ
c: 1kΩ
0 2 4 6 8 10 12 14
Voltage (kv)
10
0
-10
-20
-30
ΔR/R(%)
a
b
c
CBT50
a: 1.2MΩ
b: 10kΩ
c: 1kΩ
How to Order
CBT 25 J 10K
Common Part
25 - 0.25W
50 - 0.5W
Size
J - ±5%
K - ±10%
M - ±20%
Tolerance Resistance Value
Carbon Composition
Resistor
1 ohm
(1 ohm) 1R0
1K ohm
(1000 ohms) 1K
100K ohm
(100000 ohms) 100K
1M ohm
(1000000 ohms) 1M
