Ceramic Composition Resistors
Type CCR Series
Type CCR Series
Characteristics -
Electrical
Power at 70°C Ambient:
Derating:
Resistance Range:
Resistance Tolerance:
Temp. Coefficient (ppm/°C):
Max. Working Voltage:
Max. Overload Voltage:
Dielectric Withstand Voltage:
Impulse Withstanding Voltage*:
The CCR series of resistors is
constructed utilising solid 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 capabili-
ties, 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. The CCR series are
ideal
for
circuitry
associated
performance in high voltage power
supplies, R-C snubber circuits, and
inrush limiters.
C=1,000pF
DC
(Max. pulse voltage)
Rx
0.5 Watt.
1.0 Watt.
2.0 Watt.
Derating to 0 at 200°C Derating to 0 at 200°C
Derating to 0 at 200°C
10R – 100K
3R3 – 390K
3R3 – 390K
10% E12 series
10% E12 series
10% E12 series
<100R: -900 to ±300
>100R: -1300 to ±300
200V
300V
400V
400V
600V
800V
500 volts
500 volts
700 volts
10 Kv
14 Kv
20 Kv
NB *: Please refer to Resistance to Pulse Circuit
Characteristics -
Environmental
Operating Temperature Range:
Temperature Cycles (-40°C to 85°C, 5 cycles):
Load Life (1000 hours at 70°C):
Resistance to Solder Heat (360°C for 3 seconds):
Short Time Overload (2x rated voltage for 5 seconds):
Humidity (40°C, 95%RH 240 hrs.):
-40°C to +200°C
ΔR/R ± 2%
ΔR/R ± 5%
ΔR/R ± 3%
ΔR/R ± 2%
ΔR/R ± 5%
Resistance to Pulse
Circuit
10kΩ
1 secON
SW 1 secOFF
Key Features
I
I
I
I
I
I
I
Designed for Pulse
Withstand
Range of Resistance
Tolerances
Solid Ceramic
Composition
Resistance to Pulse Graphs
CCR1
0.80
0.60
ΔR/r (%)
DC 14KV
1 sec. on
1 sec. off
CCR2
0.80
0.60
ΔR/r (%)
DC 20KV
1 sec. on
1 sec. off
10 Kohms
Low Cost, High
Performance
Two Sizes Available
Wide Range of
Resistance Values
Available on Tape
10 Kohms
0.40
0.20
0
1 Kohm
100 ohms
0.40
0.20
0
1 Kohm
100 ohms
0
100
1,000
Cycles
10,000
20,000
0
100
1,000
Cycles
10,000
20,000
Dimensions
L
d
D
BULK
CCR1/2
CCR1
CCR2
L
9.0 ± 1.0
16.5 ± 1.0
19.0 ± 1.0
D
3.5 ± 0.5
5.5 ± 1.0
7.0 ± 1.0
d (nom)
0.7
0.8
0.8
l
30 ± 3
38 ± 3
38 ± 3
Literature No. 1773193
Issued: 12-08
Dimensions are shown for
reference purposes only.
Dimensions are in
millimetres unless
otherwise specified.
Specifications subject to
change.
tycoelectronics.com
passives.tycoelectronics.com
Ceramic Composition Resistors
Type CCR Series
Application Notes
Limitations of Potential Pulsing on Fixed Ceramic Composition Resistors
Ceramic Composition resistors are susceptible to failure under some high voltage conditions. In circuitry where
there is a possibility of transient potentials, considerable high voltage may be applied to a resistor for a short
period of time. These notes are intended to aid the determining of “safe” potential level for the CCR Series when
used in pulse application.
For Pulse Power limitations please refer to the graph (fig.1). Power below that specified on the graph will,
generally not cause any significant degradation to the resistor, but please note that the resistance value may vary
slightly due to repeated pulsing over a long period of time. The circuit designer should also be aware of the fact
that the pulse voltage is limited even under the conditions on which the graph is based. The maximum peak
pulse voltage for these resistors is the lesser of (A) or (B) below.
(A)
V peak = √Po x R
CCR1
Where:
“Po” is the pulse limit power taken from the graph.
“R” is the resistance value in ohms.
(B)
CCR1/2
1200V
CCR2
800V
1600V
The Peak Power is defined as the maximum power dissipated at any point in time regardless of the waveform
shape.
The Pulse Waveform, if other than square wave, must first be converted to an approximate square wave as
shown below.
Wp - Peak Power. Wo - Rated Power. t - Time to attenuate down to the rated power.
Wp - Peak Power. Wo - Rated Power. t - Time to attenuate down to the rated power.
Application Notes
The following design rules determine if derating of the Pulse Limit Power (Po) obtained from the graph is required
for repetitive pulse applications.
1. If T off < 4µ seconds, or T off < 5m seconds and (T off/t) < 1, then the peak power is treated as continuous
power and, therefore, Pm = the resistor’s rated wattage.
2. If T off is > 4µ sec, but is < 100µ sec, and (T off/t) < 700, then Pm = Po x 0.01 x (T off/t)0.7.
3. If T off is > 100µ sec, and (T off/t) < 200, then Pm = Po x 0.01 x (T off/t)0.85.
4. If T off is > 4µ sec, but is < 100µ sec, and (T off/t) < 700, or T off is >100µ sec, and (T off/t) > 200,
then Pm = Po as obtained from the pulse power graph.
Where:
Pm:
Po:
T off:
t:
Derated Pulse Power (W)
Pulse Power from graph below (W)
Off time between pulses (sec)
Pulse width (sec)
Literature No. 1773193
Issued: 12-08
Dimensions are shown for
reference purposes only.
Dimensions are in
millimetres unless
otherwise specified.
Specifications subject to
change.
tycoelectronics.com
passives.tycoelectronics.com
Ceramic Composition Resistors
Type CCR Series
Application Notes (continued)
Notes
•
Graph pulse power (Po) is for ambient temperatures of 70°C or less. For ambient operating temperatures
greater than 70°C, pulse power (Po) or (Pm) must be further derated by 1.18% per °C above 70°C in
accordance with the power derating schedule of the resistor.
•
If derated pulse power (Pm) is calculated to be less than the resistor’s rated continuous power, the resistor’s
rated wattage should be used.
Pulse Limiting Power (Po) One Pulse
1000000
CCR 2
CCR 1
100000
CCR 1/2
10000
Pulse Power
1000
100
10
1
0.0001
0.001
0.01
Pulse T ime (s)
0.1
1
10
How to Order
CCR
Common Part
1
Power Rating
_ - 0.5 Watt
CCR
1 – 1.0 Watt
2 – 2.0 Watt
10R
Resistance Value
10 ohm
(10 ohms)
10R
1K ohms
(1000 ohms)
1K0
100K ohms
(100000 ohms)
100K
K
Tolerance
B
Packaging
B - Bulk
K - 10%
T - Taped
Literature No. 1773193
Issued: 12-08
Dimensions are shown for
reference purposes only.
Dimensions are in
millimetres unless
otherwise specified.
Specifications subject to
change.
tycoelectronics.com
passives.tycoelectronics.com
京公网安备 11010802033920号
EEWORLD
