L
dD
Type CCR Series
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.
Key Features
IDesigned for Pulse
Withstand
IRange of Resistance
Tolerances
ISolid Ceramic
Composition
ILow Cost, High
Performance
ITwo Sizes Available
IWide Range of
Resistance Values
IAvailable on Tape
Characteristics -
Electrical
Power at 70°C Ambient: 0.5 Watt. 1.0 Watt. 2.0 Watt.
Derating: Derating to 0 at 200°C Derating to 0 at 200°C Derating to 0 at 200°C
Resistance Range: 10R – 100K 3R3 – 390K 3R3 – 390K
Resistance Tolerance: 10% E12 series 10% E12 series 10% E12 series
Temp. Coefficient (ppm/°C): <100R: -900 to ±300 >100R: -1300 to ±300
Max. Working Voltage: 200V 300V 400V
Max. Overload Voltage: 400V 600V 800V
Dielectric Withstand Voltage: 500 volts 500 volts 700 volts
Impulse Withstanding Voltage*: 10 Kv 14 Kv 20 Kv
NB *: Please refer to Resistance to Pulse Circuit
Dimensions
BULK L D d (nom) l
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
Resistance to Pulse
Circuit
Resistance to Pulse Graphs
CCR1 CCR2
Characteristics -
Environmental
Operating Temperature Range: -40°C to +200°C
Temperature Cycles (-40°C to 85°C, 5 cycles): ΔR/R ± 2%
Load Life (1000 hours at 70°C): ΔR/R ± 5%
Resistance to Solder Heat (360°C for 3 seconds): ΔR/R ± 3%
Short Time Overload (2x rated voltage for 5 seconds): ΔR/R ± 2%
Humidity (40°C, 95%RH 240 hrs.): ΔR/R ± 5%
10kΩ
C=1,000pF
DC
(Max. pulse voltage)
SW 1 secON
1 secOFF
Rx
0 100 1,000 10,000 20,000
Cycles
0.80
0.60
0.40
0.20
0
ΔR/r (%)
100 ohms
1 Kohm
10 Kohms
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 (%)
100 ohms
1 Kohm
10 Kohms
DC 14KV
1 sec. on
1 sec. off
Ceramic Composition Resistors
Type CCR Series
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
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) (B)
V peak = √Po x R CCR1/2 800V
CCR1 1200V
Where: CCR2 1600V
“Po” is the pulse limit power taken from the graph.
“R” is the resistance value in ohms.
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: Derated Pulse Power (W)
Po: Pulse Power from graph below (W)
T off: Off time between pulses (sec)
t: Pulse width (sec)
Ceramic Composition Resistors
Type CCR Series
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
Pulse Limiting Power (Po) One Pulse
0.0001 0.001 0.01 0.1 1 10
Pulse T ime (s)
1000000
100000
10000
1000
100
10
1
CCR 2
CCR 1
CCR 1/2
Pulse Power
How to Order
CCR 1 10R K B
Common Part
_ - 0.5 Watt
1 – 1.0 Watt
2 – 2.0 Watt
Power Rating
10 ohm
(10 ohms)
10R
1K ohms
(1000 ohms)
1K0
100K ohms
(100000 ohms)
100K
Resistance Value Tolerance
CCR K - 10%
Packaging
B - Bulk
T - Taped
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.
Ceramic Composition Resistors
Type CCR Series
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
