Capacitor Discharge
Resistors
CDR Series
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·
·
·
·
·
·
Excellent reliability
Suitable for immersion in capacitor dielectric fluid
Voltage ratings up to 20kV
Excellent overload capability
Robust terminations
Resistance values up to 10M
RoHS compliant
Electrical Data
CDR01
Power rating at 70°C (in air)
Power rating at 70°C (in dielectric fluid)
Limiting element voltage
Overload power (90s at 25°C in dielectric fluid)
Overload voltage (90s in dielectric fluid)
Resistance range
Resistance tolerance
Values
Ambient temperature range
°C
watts
kV
%
2
CDR02
1
2
30
6
CDR03
1.75
3.5
50
10
10
CDR04
2.5
5
75
10
CDR05
3.75
7.5
100
20
CDR06
5
10
150
20
watts
watts
0.63
1.25
20
6
not applicable
1
ohms
100K to 10M
E6 preferred
-55 to 155
Note 1: No LEV applies to CDR; the maximum operating voltage (dc or ac rms) is given by
√(Pr.R),
where Pr is the relevant power rating for air or
fluid and R is the resistance value.
Note 2: Overload voltages are dc or ac peak values.
Physical Data
Dimensions (mm) and weight (g)
L
H
Type
±1
±1
CDR01
CDR02
CDR03
CDR04
CDR05
CDR06
25.4
25.4
33.9
33.9
50.8
50.8
12.7
12.7
20.33
20.33
25.4
25.4
W
±0.5
2.25
2.75
2.25
2.75
2.25
2.75
DØ
±0.05
0.8
0.8
0.8
0.8
0.8
0.8
P
1
±1.0
20.3
20.3
30.5
30.5
45.7
45.7
F
±5
50
50
50
50
60
60
Weight
2
2.5
3.5
5
5.8
8.2
L
H
P
F
W
DØ
Note 1: Termination pitch dimension P is measured between the lead centres at 1mm from the resistor body.
General Note
TT electronics reserves the right to make changes in product specification without notice or liability.
All information is subject to TT electronics’ own data and is considered accurate at time of going to print.
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
© TT electronics plc
04.13
Capacitor Discharge Resistors
CDR Series
Overload Performance
CDR06
CDR05
CDR04
CDR03
CDR02
CDR01
Construction
CDR is a high voltage planar style resistor. Pd/Ag terminations are printed and fired onto the front face of a 96% alumina substrate. A resistor
material is printed with a high voltage design between the terminations and after firing gives an excellent high voltage performance. This is
then laser adjusted to target value before being coated in a glass material. Hot tin dipped copper wire terminations are then fitted using Sn/
Ag/Cu solder. The product is 100% measured for resistance value. It is cleaned of all flux residues and ionic contamination in order to ensure
compatibility with capacitor dielectric fluid applications.
Marking
Type and resistance value are legend marked on the front of the component.
Termination Lead Pull Strength
Each termination lead shall withstand a tensile load of 1kg at an angle of 90° to the plane of the resistor, with no mechanical failure admitted,
such as breaking of the resistor substrate or shearing of the termination lead wire or solder.
Solderability
The terminations meet the requirements of IEC 115-1 Clause 4.17.3.2
Performance Data
Requirement
Load at rated power in air (1000 hours at 70°C)
Load at rated power in fluid (1000 hours at 70°C)
Derating from power at 70°C
Vibration (9-200Hz @ 5mm / 50ms
-2
, 10 sweeps @ 1 octave / min, 3 axes)
Termination pull strength (applied at 90° to plane of body, no damage visible)
Overload in dielectric fluid (90s at 25°C, see Overload Ratings graph)
ΔR%
kg
ΔR%
≤1
≥1
≤0.5
ΔR%
ΔR%
≤1
≤1
Zero at 155°C
<0.25
>4
<0.1
Typical
<0.25
<0.25
General Note
TT electronics reserves the right to make changes in product specification without notice or liability.
All information is subject to TT electronics’ own data and is considered accurate at time of going to print.
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
© TT electronics plc
04.13
Capacitor Discharge Resistors
CDR Series
Ordering Procedure
Part Number: CDR04-680KKB01
(CDR04, 680 kilohms ±10%, bulk packed)
C
D
R
1
1
Type
CDR01
CDR02
CDR03
CDR04
CDR05
CDR06
2
Value
E6 = 3/4 characters
K = kilohms
M = megohms
0
4
-
6
8
2
3
Tolerance
K = ±10%
B01
0
K
K
3
4
Packing
all sizes 100/box
B
0
4
1
General Note
TT electronics reserves the right to make changes in product specification without notice or liability.
All information is subject to TT electronics’ own data and is considered accurate at time of going to print.
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
© TT electronics plc
04.13
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