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| Type 944U Polypropylene Film Capacitors for DC Filtering Metallized Polypropylene Dielectric Type 944U is specifically designed for use in medium power DC filtering applications. The low inductance internal construction utilizes low loss metallized polypropylene for high ripple current capability. Male or female terminal options offer design flexibility in a rugged UL 94VO rated flame retardant plastic case and resin fill. Applications Inverters: DC Link DC Output Filter Specifications Capacitance Range: Voltage Range: Capacitance Tolerance: Operating Temperature Range: Dielectric Withstand: 33 F to 220 F 800 Vdc to 1400 Vdc 10% standard -40 C to +85C 150% Rated Vdc 10s - Between Terminals 4000 Vac 60s - Terminals to Case Complies with the EU Directive 2002/95/EC requirement restricting the use of Lead (Pb), Mercury (Hg), Cadmium (Cd), Hexavalent chromium (Cr(VI)), PolyBrominated Biphenyls (PBB) and PolyBrominated Diphenyl Ethers (PBDE). Ratings Catalog Part Number 944U101K801AA* 944U161K801AB* 944U221K801AC* 944U660K102AA* 944U101K102AB* 944U141K102AC* 944U470K122AA* 944U700K122AB* 944U101K122AC* 944U330K142AA* 944U520K142AB* 944U700K142AC* Cap (F) 100 160 220 66 100 140 47 70 100 33 52 70 Rated H Voltage Height (Vdc) (mm) 800 800 800 1000 1000 1000 1200 1200 1200 1400 1400 1400 40 51 64 40 51 64 40 51 64 40 51 64 H Height (in) 1.67 2.01 2.52 1.67 2.01 2.57 1.67 2.01 2.57 1.67 2.01 2.57 Max ESR 10kHz (m) 0.5 0.8 1.0 0.6 0.8 1.0 0.7 1.0 1.3 0.8 1.1 1.4 Typical ESL (nH) 20 30 40 20 30 40 20 30 40 20 30 40 Max Irms 55C (A) 74 73 72 70 68 65 67 65 64 64 60 59 Thermal Resistance cc (C/W) 2.8 3.0 3.1 2.8 3.0 3.1 2.8 3.0 3.1 2.8 3.0 3.1 ca (C/W) 5.2 4.5 4.0 5.2 4.5 4.0 5.2 4.5 4.0 5.2 4.5 4.0 * M = M8 Stud I = M5 Insert Additional values available upon request. CDE Cornell Dubilier*1605 E. Rodney French Blvd.*New Bedford, MA 02740*Phone: (508)996-8561*Fax: (508)996-3830 www.cde.com Type 944U Polypropylene Film Capacitors for DC Filtering Outline Drawing Dimensions: Millimeters (Inches) H dimension in Ratings Table I Suffix M Suffix Part Numbering System 944U Type 944U 101 Capacitance 101 = 100 F 700 = 70 F 470 = 47 F K Tolerance K = 10% 801 Voltage 801 = 800 Vdc 102 = 1000 Vdc 122 = 1200 Vdc 142 = 1400 Vdc Tolerance 0.5mm (0.019"), otherwise specified A A M Terminal M = M8 Thd Stud I = M5 Thd Insert Diameter D (mm) Height H (mm) A = 84.5 A = 40 B = 51 C = 64 CDE Cornell Dubilier*1605 E. Rodney French Blvd.*New Bedford, MA 02740*Phone: (508)996-8561*Fax: (508)996-3830 www.cde.com Type 944U Polypropylene Film Capacitors for DC Filtering Expected Lifetime Predictions To use the Expected Lifetime curves calculate Va Vr and core temperature T. Start by estimating: Applied dc voltage Va Ripple Current I Ripple Frequency f Ambient Temperature Ta Airflow speed v Units: A=m T, Ta & Tc=C C=F , ca & cc =C/W ESR=m v=m/s f=kHz Va &Vr=Vdc I=A NOTE: The temperature rise in the 944U is I(ESR) times the thermal resistance . The ESR is mainly the metal resistance; the metal resistance is the 10 kHz ESR. For operation below 10kHz add the dielectric resistance. It is the dielectric dissipation factor--no more than 0.0002--times the capacitive reactance, i.e., 0.0002 (2fC). That's equal to 31.83 (fC). 1. Start with the 10 kHz ESR from the Ratings table. If frequency is less than 10 kHz, add 31.83 (fC). 2. Compute total thermal resistance as the sum of core-to-case thermal resistance cc and case-to-ambient thermal resistance ca. Both are in the Ratings table but ca is for still air and cc is for 10 kHz or less. For frequency > 10 kHz multiply cc by [1+(f -10)/100], e.g., for 75 kHz multiply cc by 1.65. For moving air use the capacitor surface area A and airflow speed v to calculate ca = 1 [A(5+17.5(v+0.1)0.66)]. 3. Compute Va Vr and the core temperature T. T = Ta + I(ESR) 4. Look up estimated lifetime from the Expected Lifetime curves. 5. If you want a longer expected lifetime, choose a capacitor with higher voltage rating or consider using multiple capacitors in parallel to share the ripple current. Permissible Voltage Surge Duty for 100,000 Hour Life Expectancy at 50 C Core Temperature Factor 1.67x 1.50x 1.30x 1.10x 1.00x Duration Frequency t 100 ms 1x/day t 5 minutes 1x/day t 2.5 hours 1x/day t 9.6 hours 1x/day balance (11.9 h) 1x/day CDE Cornell Dubilier*1605 E. Rodney French Blvd.*New Bedford, MA 02740*Phone: (508)996-8561*Fax: (508)996-3830 www.cde.com Type 944U Polypropylene Film Capacitors for DC Filtering Typical Performance Curves 4 160F 800Vdc ESR vs Frequency and Temperature 3.5 3 ESR (m) 2.5 85C 2 65C 45C 25C 0C 1.5 -20C -40C 1 100 1000 Frequency (Hz) 10000 100000 160F 800Vdc Rated Ripple Current, Still Air, 5kh Life 90.00 45C 80.00 55C 70.00 65C Rated Ripple Current (A) 60.00 50.00 75C 40.00 30.00 85C 20.00 10.00 0.00 10 100 1000 Frequency (Hz) 10000 100000 CDE Cornell Dubilier*1605 E. Rodney French Blvd.*New Bedford, MA 02740*Phone: (508)996-8561*Fax: (508)996-3830 www.cde.com |
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