Ceramic Composition Resistors
Type CCR Series
Type CCR Series Characteristics -
Electrical
Power at 70C Ambient: 0.5 Watt. 1.0 Watt. 2.0 Watt.
Derating: Derating to 0 at 200C Derating to 0 at 200C Derating to 0 at 200C
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
The CCR series of resistors is
NB *: Please refer to Resistance to Pulse Circuit
constructed utilising solid ceramic
composition, which is the traditional
Characteristics -
medium for absorbing high energy
Environmental
pulses, in cases of high inrush
Operating Temperature Range: -40C to +200C
current. These resistors have
Temperature Cycles (-40C to 85C, 5 cycles): R/R 2%
evolved over many years to have
Load Life (1000 hours at 70C): R/R 5%
excellent pulse withstand capabili-
Resistance to Solder Heat (360C for 3 seconds): R/R 3%
ties, whilst remaining very stable.
Short Time Overload (2x rated voltage for 5 seconds): R/R 2%
These improved characteristics
Humidity (40C, 95%RH 240 hrs.): R/R 5%
have been achieved by prudent
selection of materials of optimum
physical properties and by
Resistance to Pulse
advances in the manufacturing
Circuit
process. The CCR series are
1 secON
10k SW
ideal for circuitry associated
1 secOFF
performance in high voltage power
supplies, R-C snubber circuits, and
Rx
DC C=1,000pF
inrush limiters.
(Max. pulse voltage)
Key Features
Designed for Pulse
Withstand
Resistance to Pulse Graphs
Range of Resistance
CCR1
CCR2
Tolerances
0.80 0.80
Solid Ceramic DC 14KV DC 20KV
1 sec. on 1 sec. on
Composition 1 sec. off 1 sec. off
0.60 0.60
10 Kohms
10 Kohms
Low Cost, High
0.40 0.40
Performance
1 Kohm
0.20 0.20
1 Kohm
Two Sizes Available
100 ohms 100 ohms
Wide Range of 0 0
0 100 1,000 10,000 20,000 0 100 1,000 10,000 20,000
Resistance Values
Cycles Cycles
Available on Tape
Dimensions
L
d
D
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
Literature No. 1773193 Dimensions are shown for Dimensions are in Specifications subject to tycoelectronics.com
Issued: 12-08 reference purposes only. millimetres unless change. passives.tycoelectronics.com
otherwise specified.
R/r (%)
R/r (%)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) (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 < 4 seconds, or T off < 5m seconds and (T off/t) < 1, then the peak power is treated as continuous
power and, therefore, Pm = the resistors rated wattage.
2. If T off is > 4 sec, but is < 100 sec, and (T off/t) < 700, then Pm = Po x 0.01 x (T off/t)0.7.
3. If T off is > 100 sec, and (T off/t) < 200, then Pm = Po x 0.01 x (T off/t)0.85.
4. If T off is > 4 sec, but is < 100 sec, and (T off/t) < 700, or T off is >100 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)
Literature No. 1773193 Dimensions are shown for Dimensions are in Specifications subject to tycoelectronics.com
Issued: 12-08 reference purposes only. millimetres unless change. passives.tycoelectronics.com
otherwise specified.