A-05- 13 , nubber Capacitors for high dV/dt snubbers and resonant power supplies High peak current and ac current punish capacitors in snubber circuits and resonant power supplies. These capacitors take it with ease. CDE snubber capacitors are all rated for peak current and rms current in the tables. @ How to Choose a Snubber Capacitor An application note on how to design an RC snubber begins on page 14; so turn to page 14 if snubbers are new to you. However, if you know what capacitance you need, turn directly to the ratings pages guided by these tips: The capacitors here are for circuits which zap capacitors with big current transients or continuous, high-frequency current. For such applications and capacitance Performance Highlights values up to 0.01 pF look first at the Snubber Mike dipped mica capacitors. For higher capacitance values, move up to radial-leaded polypropylene, film/foil capacitors looking first at Type DPP for up to 630 Vdc and choosing between Types DPFF and DPPS for higher voltages. For the smallest case size at high voltagebut with significantly lower peak current capability choose Type DPPM or DPMF. Capacitance range 100 pF to 3 uF e Voltage range 250 to 2,000 Vdc, 140 to 500 Vac e Up to 100,000 V/us dV/dt Contents e Up to 3,700 amps peak current Available from stock NEW TYPE CD16 Radial-Leaded Snubber Mike Capacitors ...........::00+ e Snubber-Mike Specifications and Application Guide * Axial-Leaded Polypropylene Snubber Capacitors ........ * Radial-Leaded Polypropylene Snubber Capacitors ay Current Capability Polypropylene-Capacitor Specifications and Application Guide... << * Designing an RC Snubber. 200.0000... eccecccccceeeeeereceeeneeees Ordering Information ...........::ccesssneereetseeeeeseneeeeesceees Twice the Peak 1605 East Rodney French Boulevard New Bedford, MA 02744 (508) 996-8564, FAX (508) 996-3830 D ObF MM 2448860 0004260 55] mm CORNELL DUBILIERRadial-Leaded Snubber Mike Capacitors With 75% lower impedance at resonance than ceramic after a million shots. disks and twice the dV/dt capability of our best polypro- pylene film/foil capacitors, CDE Snubber Mikes are the choice for snubbers and resonant power applications. They're quiet too: Theres no piezoelectric buzz like with high K ceramic capacitors. While the industry standard IEC test procedure permits 3% capacitance change after 10,000 dV/dt pulses, Snubber Mikes show no change Copper-clad steel leads Highlights AWG CD16 20 * Up to 9.0 amps continuous current i CD30 18 e Up to 3,700 amps peak current H Max. cPvae 20 * Up to 1,500 Vdc, 400 Vac i * 100,000 V/us capability minimum AL * QuietNo piezoelectric buzzing Measured at) [fF~-~" ~~ 078" M * No capacitance change with voltage, point where el phenolic cone no solder || 4.250 temperature or frequency becomes a Min. @ -55C to +125C at rated voltage cylinder Silvered mica dielectric d ' Ratings and Dimensions Cap. Dimensions, in. Catalog Ipk Irms, 85C pF L H T d Number Amps WOOkHz = 250kHz 500kHz 1MHz 2.5MHz 5MHz 500 Vdc (300 Vac 100 43 AG 15 23 032 CD1GFD101J03 20 019 047 09 19 A7 18 120 43 AG 15 23 032 CD16FD121J03 24 023 057 1 23 57 86 150 43 AG 15 23 032 CD16FD151J03 30 028 074 14 28 Ad 96 180 43 AG 15 23 032 CD16FD181J03 36 034 085 A7 34 85 11 220 43 46 15 23 032 CD16FD221J03 44 041 10 21 Ai 1.0 12 270 45 AT 16 23 032 CD16FD271J03 54 051 13 25 51 1.3 13 330 45 AZ 16 23 032 CD16FD331J03 66 .062 16 31 62 15 1.5 390 A A7 16 23 032 CD16FD391J03 78 074 18 of 74 1.6 1.6 470 45 A7 16 23 .032 CD16FD471J03 94 .089 22 44 89 1.8 18 560 46 50 18 23 032 CD16FD561J03 110 A 26 53 14 2.0 2.0 680 6 50 18 23 032 CD16FD681J03 130 13 32 64 1.3 23 23 820 46 50 18 23 .032 CD16FD821J03 160 15 39 AT 15 25 2.5 1000 6 50 18 23 032 CD16FD102J03 200 19 AT 94 1.9 27 27 1200 46 50 18 23 .032 CD16FD122J03 240 23 of 1 2.3 3.0 3.0 1500 46 50 18 23 .032 CD16FD152J03 300 28 a1 14 27 3.3 3.3 1800 A7 52 25 23 .032 CD16FD182J03 360 34 85 17 3.4 41 41 2200 AT 52 25 23 032 CD16FD222J03 440 AI 1.0 2.1 41 45 45 2700 47 52 25 23 .032 CD16FD272J03 540 AT 1.3 25 5.0 5.0 5.0 3000 A7 52 29 23 .032 CD16FD302J03 600 57 14 2.8 5.2 5.2 5.2 3300 48 54 28 23 032 CD16FD332J03 600 57 14 2.8 5.7 6.8 6.8 3600 A8 54 28 23 032 CD16FD362J03 720 68 17 3.4 68 74 7A 3900 A8 54 28 23 032 CD16FD392J03 780 4 1.8 37 74 74 74 4300 48 54 28 23 .032 CD16FD432J03 860 81 2.0 40 7.0 78 78 4700 49 56 st 23 .032 CD16FD47203 940 89 2.2 44 8.5 85 85 5600 AY 56 31 23 032 CD16FD562J03 1100 14 2.6 5.3 9.0 9.0 9.0 6800 50 08 35 23 032 CD16FD682J03 1300 1.3 3.2 64 9.0 9.0 9.0 7500 50 58 35 23 .032 CD16FD752J03 1500 1.4 3.5 7A 9.0 9.0 9.0 8200 19 .B8 32 43 .040 CD30FD822J03 1200 15 3.8 5.4 77 77 a7 10000 80 89 34 AS .040 CD30FD103J03 1500 1.9 4.2 6.0 85 8.5 8.5 @ 1605 East Rodney French Boulevard CORNELL 2 New Bedford, MA 02744 DUBILIER (508) 996-8564, FAX (508) 996-3830 D ObF MM 2448460 0004281 69596Radial-Leaded Snubber Mike Capacitors Cap. Dimensions, in. Catalog Ipk Irms, 85C pF L H T s d Number Amps 100kH2 = 250kHz = 500kHz 1MHz = 2.5MHz = SMHz 1000 Vde (350 Vac) 100 43 A6 15 23 .032 CDV16FF101003 23 022 055 A 22 55 92 150 43 46 15 23 .032 CDV16FF151J03 34 033 082 16 33 82 14 220 43 46 15 23 032 CDV16FF221J03 50 048 A2 24 AB 12 1.4 330 A5 AT -16 23 032 CDV16FF331J03 74 073 18 36 33 1.8 1.8 470 45 47 16 23 032 CDV16FF471J03 100 10 26 52 1.0 21 24 680 46 50 18 23 032 CDV16FF681J03 150 15 aT 15 15 27 27 1000 46 50 18 23 032 CDV16FF102J03 220 22 55 11 2.2 3.2 3.2 1500 A6 50 18 23 032 CDV16FF152J03 330 33 82 16 3.3 3.9 3.9 2200 AT 52 28 23 032 CDV16FF222J03 600 48 12 2.4 48 5.3 5.3 3000 Al 52 25 23 032 CDVIGFF302J03 825 66 1.6 3.3 6.2 6.2 6.2 3300 72 59 38 34 032 CDV19FF332J03 700 BB 1.8 3.6 5.5 55 5.5 4700 76 63 AB a4 032 CDVI9FF472U03 | 1000 1.0 26 46 6.5 6.5 6.5 6800 80 89 36 44 040 CDV30FF682J03 | 2100 15 37 55 78 78 78 8200 81 90 39 44 .040 CDV30FF822J03 | 2500 18 41 5.8 8.2 8.2 8.2 10000 82 a) 42 AA 040 CDV30FFI03J03 | 3000 2.2 44 6.2 8.7 8.7 87 1500 Vdc (400 Vac 100 a7 85 25 A3 .040 CDV30FH101J03 46 0.025 0.063 0.13 0.25 0.63 13 150 a7 85 25 AS 040 CDV30FH151J03 68 0.038 0.094 0.19 0.38 0.94 1.9 220 a7 85 25 43 040 CDV30FH221J03 100 0.055 0.14 0.28 0.55 14 28 330 a7 85 25 A3 040 CDV30FH331J03 150 0.083 0.21 0.41 0.83 24 3.1 - 470 wil 85 25 4 040 CDV30FH471J03 210 0.12 0.30 0.59 1.2 3.0 35 680 T7 85 25 44 .040 COV30FH681J03 310 0.17 0.43 0.85 17 3.9 3.9 1000 a7 86 26 43 040 CDV30FH102J03 460 0.25 0.63 13 2.5 44 44 1500 78 87 28 43 .040 CDV30FH152J03 680 0.38 0.94 19 3.8 49 49 2200 19 88 3 43 .040 CDV30FH222J03 | 1000 0.55 14 2.8 55 55 5.5 3300 80 89 35 A3 040 CDV30FH332J03 | 1500 0.83 21 41 6.3 6.3 6.3 4700 81 90 38 4B 040 CDV30FH472J03 | 2100 1.2 3.0 49 7.0 7.0 7.0 6800 83 92 42 43 040 CDV30FH682J03 | 3100 17 3.9 55 78 78 78 $200 84 8 A6 48 040 CDV30FH822J03 | 3700 2.1 4] 58 8.2 8.2 8.2 Snubber-Mike Specifications and Application Guide Capacitance Tolerance: +5% is standard. Capacitance is within tolerance when measured at these frequencies: 1-1000 pF @ 1 MHz > 1000 pF @ 1 kHz Dissipation Factor is equal to DF=2nfRC, where f is the test frequency, Ris the equivalent series resistance, and C is the capacitance. Limits are Capacitance Dissipation Factor 100-1000 pF 0.00075 max at 1 MHz 1200-3300 pF 0.0014 max at 1 kHz 3900-9100 pF =- 0.0013 max at 1 kHz 10,000 pF 0.0012 max at 1 kHz Quality Factor Q is the reciprocal of dissipation factor. Insulation Resistance is no less than 100 GQ at 25C and 10 GQ at 125C. Pulse Capability: The brass clips used in Snubber Mike capacitors allow them to endure huge transient currents. Allare capable of withstanding an unlimited number of pulses with a dV/dt of 100,000 V/us tested per IEC 384-1. dV/dt ratings are below: Types CD16 CD30 CDV16 | CDV19 | CDV30 Rated Volts | dV/dt maximum, V/s 500 | 275000 152000 1000 | 275000 |} 213000; 303000 1500 455000 The peak current rating in amps is the rated capacitance in uF times the dV/dt rating. Ipk = C(aV/dt) Maximum Current: Snubber Mike capacitors can handle high ac cur- rent and voltage. Capacitors rated 500 Vdc can withstand 300 Vac; 1000 Vdc, 350 Vac; and 1500 Vdc and higher, 400 Vac. Maximum current is determined by either the voltage rat- ing or temperature rise from power. Typically voltage rating determines the maximum current for frequen- cies 500 kHz and lower. The current as a function of voltage is I=2n(Vac)(f)(C) I = capacitor current, A ac Vac = rated ac voltage, V ac f = frequency of current, MHz rated capacitance, uF For higher frequencies, temperature rise from power dissipation determines maximum current. Case temperature may increase 15C without affecting performance. Use the table below to calculate the current required for a 15C rise using rated capacitance, C in pF and frequency, f in MHz. co R NELL !605 East Rodney French Boulevard CDE DUBILIER New Bedford, MA 02744 (508) 996-8564, FAX (508) 996-3830 D ObBF MM 2448460 OO04e6e 724Radial-Leaded Snubber Mike Capacitors Type Current Max A ac CD15 0.0073(c*) ~/f CD19 = 0.034(C*) - ] f CD30 0.085~] Cf CDV19 0.095 ~J Cf CDV30 0.55(C%) 4] f The above applies up to 1 MHz. The 1 MHz current is the absolute maxi- mum rating. Below is an alternate way to calcu- late the current required for a 15C rise, based on case area and Equiva- lent Series Resistance (ESR). I = 0.12~JATA/R I = capacitor current, A ac AT = temperature rise, 15C A = case area, in? R = ESR,Q The ESR of CDE mica capacitors is quite low, less than 0.19 at 1 MHz for 1000 pF and up. But the ESR var- ies inversely with frequency and ca- pacitance. Typically, the ESR is less than 60/fC(MHz-pF or kHz-nF) for frequencies below a megahertz. ESR increases 3 to 5% C with temperature. The ratings show voltage-limited maximum current crossing over to temperature-limited maximum cur- rent at higher frequencies. Withstanding Voltage is 2 times the rated dc voltage, and can be applied up to 5 seconds without damage. Surge Voltage: Snubber Mike ca- pacitors will withstand 500 Vdc max peak transients above rated voltage. For example, in flyback regulators with less than 500 Vdc bias, you may use 500 Vdc rated capacitors pro- vided that the switching transient peaks are less than 1000 V. Voltage Coefficient: The change in capacitance from O volts to rated voltage is less than 0.1%. Temperature Coefficient and Ca- pacitance Drift: Measure capaci- tance at 25C, -55C, 25C, 125C and at 25C after stabilizing at each temperature. The temperature coeffi- cient will be 35 +35 ppm/C and the capacitance will be the initial value +(.05%+.1 pF). Marking: Per EIA RS153 B and in- cludes CD manufacturers name, Nominal capacitance in pF, Capaci- tance tolerance, and DC working voltage if other than 500 V. Solderability: After an 8-hour steam aging, coat leads with rosin flux (R) and immerse in molten 245C +5C 60/40 tin lead solder. Solder coverage will be no less than 95% when examined at 10X magnification. Life Test: Subject the capacitors to maxi- mum operating temperature (+125 or +150C) with 1.5 times rated voltage applied for 2000 hours. There will be no visual damage and the capacitors will meet these after-test limits: Withstanding voltage and insulation resistance initial requirements, capaci- tance change +1% maximum, and DF 150% initial limit maximum. Moisture Resistance: Capacitors will meet the requirements of MIL-STD- 202, Method 106F as outlined here and diagrammed below. Refer to MIL-STD-202 for details. 1. Dry capacitors for 24 hours in a 50+2C oven and then allow to stabilize at room temperature. 2. Subject the capacitors to 10 24- hour continuous cycles with rela- tive humidity and temperature as shown. 3. 24 hours after completion of the last cycle the capacitors will show no visual damage and will meet these after-test limits: Withstand- ing voltage initial requirement, insulation resistance 30 GQ mini- mum, capacitance change +1% maximum, and DF 150% initial limit maximum. 24-Hour Moisture Resistance Cycle 6512C ESR vs. Frequency Impedance vs. Frequency 100 90-98% RH p 8 ; je) 3-4 tn \ 90-98% RH Bk NN Lo, 3 2-P-2/s 3 ved 4a KS VA hours \ + oonrez i OMe, 10OMHZ GHz Self-Resonant Frequency 1GHz 00MHz 1GHz Pie 100MHz ., Kit of 64 Lig popular : p ratings -1% g >< Kit #5 55C 425C we we 150C 1 OMe OOpF 1 j 7 F Temperature Capecitance 1605 East Rodney French Boulevard New Bedford, MA 02744 (508) 996-8564, FAX (508) 996-3830 CORNELL DUBILIER D ObF MH 2448840 0004283 LbO