Specifications, Pulse and High-Frequency Polypropylene Capacitors Specifications and Application Guide Capacitance is within tolerance when measured at 1 kHz, 25°C. Standard (K) tolerance is ± 10% unless specified otherwise. For high-frequency operation, the maximum rms current rating ensures that the capacitor’s case temperature rise does not exceed 15°C. Operating Temperature Range: Polypropylene capacitors may be operated at full rated voltage from -55°C to +85°C. Above 85°C derate linearly to 50% rated voltage at 105°C. Under no circumstances To calculate the maximum rms voltage and current that would result in a 15°C heat rise, the following equations may be used. should polypropylene capacitors be used at an ambient temperature exceeding 105°C. Pulse, Hi-Frequency & Snubber Capacitors Insulation Resistance: Insulation resistance is no less than the lesser of the RC product or the R specified in the following table. IR is measured after 2 minutes at 100 VDC and 25± 5°C: Type Minimum IR Minimum RC 940C 941C 942C 943C DPP DPPS DPFF DPPM DPMF SCD SCM* SCC* Not Specified Not Specified Not Specified Not Specified 100,000 Mmin 400,000 Mmin 200,000 Mmin 400,000 Mmin 200,000 Mmin Not Specified Not Specified Not Specified 100,000 MxF 100,000 MxF 100,000 MxF 100,000 MxF 50,000 MxF 200,000 MxF Not Specified Not Specified Not Specified 100,000 MxF 100,000 MxF 100,000 MxF *Applies to capacitor only. See data tables for diode specifications. Rated DC Voltage is the maximum continuous voltage that may be applied at the maximum rated operating temperature. AC Voltage and Pulse Rating: Keep voltage peaks to less than the rated DC voltage and AC voltage to less than the rated rms volts. Limit the current peaks to the rated peak. 5.022 For Round Cases Vrms = 2300 [D(.5D+L)/fC(df)].5 Irms = .0144[fCD(.5D+L)/df].5 For Oval and Rectangular Cases Vrms = 1800 [(TH+TL+HL)/fC(df)].5 Irms = .0115[fC(TH+TL+HL)/(df)].5 Where D,T,H, and L are dimensions in the ratings tables, f is frequency in Hz and C is nominal capacitance in µF. (df) is dissipation factor in percent from the df vs Frequency curve on page 5.023. Under no circumstances should the applied rms voltage exceed the rated rms voltage otherwise corona inception may occur. Also, rms current must not exceed rated rms current of the leads. Maximum Allowable RMS Lead Current Cap Type Lead Dia. Irms Max. DPP .024” .032” 2.0 A 3.0 A DPFF DPPS DPMF DPPM 940C-943C .032” .040” .047” 9.0 A 15.0 A 23.0 A SCD SCM SCC – – – 1605 East Rodney French Blvd. New Bedford, MA 02744 (508) 996-8564, Fax (508) 996-3830 http://www.cornell-dubilier.com E-mail: [email protected] 50 A 50 A 50 A CORNELL DUBILIER Your Source For Capacitor Solutions Specifications, Pulse and High-Frequency Polypropylene Capacitors Typical Characteristics Dissipation Factor vs. Temperature 4 .020 % Dissipation Factor % Capacitance Change Capacitance Change vs. Temperature 2 0 -2 -4 -6 -55° -25° 0° 25° 50° 75° 100° 0.15 0.10 0.05 0 -55° -25° Degrees Centigrade 0° 25° 50° 75° 100° Degrees Centigrade Insulation Resistance vs. Temperature Dissipation Factor vs. Frequency MΩ x µF 100,000 50,000 10,000 5,000 1,000 500 100 25° 45° 65° 85° Degrees Centigrade CORNELL DUBILIER Your Source For Capacitor Solutions 105° 1605 East Rodney French Blvd. New Bedford, MA 02744 (508) 996-8564, Fax (508) 996-3830 http://www.cornell-dubilier.com E-mail: [email protected] 1.0 Pulse, Hi-Frequency & Snubber Capacitors % Dissipation Factor 1,000,000 500,000 0.5 0.5 kHz 1 kHz 10 kHz 100 kHz Frequency 5.023