Information

Product Portfolio for the Railway Sector
Type CBT / CCR Series
Literature No. 4-1773460-6 Dimensions are in millimeters Dimensions are shown for TE Connectivity / Berwyn, PA
Issued 3-11 and inches unless otherwise reference purposes only. For email, phone or live chat, go to: te.com/help
specified. Values in brackets Specifications subject
are standard equivalents. to change.
The CBT and CCR Series of resistors are constructed utilising solid carbon or
ceramic 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 manufacturing process.
Key Features
I Ceramic or carbon element
I Designed for pulse
withstand
I Solid element construction
I High performance
I 0.25W to 2.0W dissipation
Applications
I R-C Snubber circuits
I HV power supplies
I Inrush limiting
I Surge protection
Characteristics - Electrical
Pulse Withstand Characteristics
Charging and discharging a 2000pF Capacitor for 100 Cycles
Resistance to Pulse Circuit
Dimensions
34
CBT25 CBT50 CCR1/2 CCR1 CCR2
Power at 70°C Ambient: 0.25W derating 0.5W derating 0.5W derating 1W derating 2W derating
to 0 at +125°C to 0 at +125°C to 0 at +200°C to 0 at +200°C to 0 at +200°C
Maximum Voltage: 250 V 350 V 200V 300V 400V
Resistance Range: 1R0 - 5M6 1R0 - 22M 10R – 100K 3R3 – 390K 3R3 – 390K
Resistance Values: 5% E24 Series/10% E12 Series/20% E6 Series 10% E12 series 10% E12 series 10% E12 series
Voltage Coefficient: ± 0.035%/V ± 0.035%/V – – –
Limiting Element Voltage: 250 V 350 V – – –
Maximum Overload Voltage: 400 V 700 V 400V 600V 800V
Dielectric Withstand Voltage: – – 500 V 500 V 700 V
Impulse Withstanding Voltage*: – – 10 Kv 14 Kv 20 Kv
Temperature Coefficient (ppm/°C): – – <100R: -900 to ±300 >100R: -1300 to ±300
NB *: Please refer to Resistance to Pulse Circuit
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
0 100 1,000 10,000 20,000
Cycles
0.80
0.60
0.40
0.20
0
ΔR/R (%)
100Ω
1KΩ
10KΩ
DC 20KV
1 sec. on
1 sec. off
0 100 1,000 10,000 20,000
Cycles
0.80
0.60
0.40
0.20
0
ΔR/R (%)
100Ω
1KΩ
10KΩ
DC 14KV
1 sec. on
1 sec. off
Style L D d (nom) l
CBT25 6.3 ± 0.7 2.4 ± 0.1 0.6 27 min.
CBT50 9.5±0.8 3.6±0.2 0.7 25 min.
CCR1/2 9.0 ± 1.0 3.5 ± 0.5 0.7 30 ± 3
CCR1 16.5 ± 1.0 5.5 ± 1.0 0.8 38 ± 3
CCR2 19.0 ± 1.0 7.0 ± 1.0 0.8 38 ± 3
10kΩ
C=1,000pF
DC
(Max. pulse voltage)
SW
1 secON
1 secOFF
Rx
Resistance to Pulse Graphs - CCR1
CCR2
Rail brochure internal pages feb 11.qxd 17/3/11 13:12 Page 34