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.