Type 944U Polypropylene, DC Link Capacitors High Current, Low Profile for Inverter Applications Type 944U is specifically designed for use in high 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. High current ratings and robust mounting flanges make the 944U suited for inverter applications in electric vehicle power inverters, wind power inverters and motor drives. Film Highlights - Low Inductance - Low Profile - Low ESR - High Ripple Current - High Voltage Ratings Specifications Capacitance Range 33 to 220 µF Capacitance Tolerance ±10% standard Rated Voltage 800 to 1400 Vdc Operating Temperature Range -40 ºC to 85 ºC Maximum rms Current 74A @ 55 ºC Maximum rms Voltage 230 Vac Test Voltage between Terminal @ 25ºC 150% rated DC voltage for 10 s Test Voltage between Terminals & Case @ 25ºC 4 kVac @ 50/60 Hz for 60 s Life Test 5000 h @ 85 ºC, rated voltage RoHS Compliant Dimensions Construction Details 20 ±0.5 mm 6 ±0.5 mm H ±0.5 mm 5 mm Threaded Stud Case Material Plastic UL94V-0 Resin Material Dry Resin UL94V-0 Terminal Material Tin Plated Brass M8 x 1.25 8.5 Nm Max Torque 71.4 mm UL Recognized E128034 construction only - unprotected 15 mm 84.5 mm 45 ±1 mm 101 mm M5 x 4.0 mm 2.5 Nm Max Torque 15 mm Threaded Insert 5.5 mm 3 Nm Mounting Torque 90° CDE Cornell Dubilier • 1605 E. Rodney French Blvd. • New Bedford, MA 02744 • Phone: (508)996-8561 • Fax: (508)996-3830 Type 944U Polypropylene, DC Link Capacitors High Current, Low Profile for Inverter Applications Part Numbering System 944U 101 K 801 Type Capacitance Tolerance Voltage 944U 101 = 100 µF K = ±10% Ratings A A M Diameter D (mm) Height H (mm) 801 = 800 Vdc A = 84.5 Terminal A = 40 M = M8 Thd Stud 700 = 70 µF 102 = 1000 Vdc B = 51 I = M5 Thd Insert 470 = 47 µF 122 = 1200 Vdc C = 64 142 = 1400 Vdc Film NOTE: Other ratings, sizes and performance specifications are available. Contact us. H Height mm Typical ESR 10kHz (mΩ) Typical ESL (nH) Max Irms 55ºC (A) 800 40 0.5 20 800 51 0.8 30 800 64 1.0 66 1000 40 100 1000 51 140 1000 944U470K122AA* 47 944U700K122AB* 70 Catalog Part Number Cap (µF) 944U101K801AA* 100 944U161K801AB* 160 944U221K801AC* 220 944U660K102AA* 944U101K102AB* 944U141K102AC* Rated Voltage (Vdc) Thermal Resistance Θcc (ºC/W) Θca (ºC/W) 74 2.8 5.2 73 3.0 4.5 40 72 3.1 4.0 0.6 20 70 2.8 5.2 0.8 30 68 3.0 4.5 64 1.0 40 65 3.1 4.0 1200 40 0.7 20 67 2.8 5.2 1200 51 1.0 30 65 3.0 4.5 944U101K122AC* 100 1200 64 1.3 40 64 3.1 4.0 944U330K142AA* 33 1400 40 0.8 20 64 2.8 5.2 944U520K142AB* 52 1400 51 1.1 30 60 3.0 4.5 944U700K142AC* 70 1400 64 1.4 40 59 3.1 4.0 * M = M8 Stud I = M5 Insert Typical Performance Curves 160 µF 800 Vdc Rated Ripple Current, Still Air, 5 kh Life 90.00 160 µF 800 Vdc ESR vs Frequency and Temperature 4 45 ºC 80.00 55 ºC 3.5 65 ºC 3 60.00 50.00 ESR (mΩ) Rated Ripple Current (A) 70.00 75 ºC 40.00 2.5 85 ºC 65 ºC 45 ºC 25 ºC 2 30.00 85 ºC 20.00 0 ºC -20 ºC 1.5 -40 ºC 10.00 1 0.00 10 100 1000 Frequency (Hz) 10000 100000 100 1000 Frequency (Hz) 10000 100000 CDE Cornell Dubilier • 1605 E. Rodney French Blvd. • New Bedford, MA 02744 • Phone: (508)996-8561 • Fax: (508)996-3830 Type 944U Polypropylene, DC Link Capacitors Capacitance: C (µF) Equivalent Series Resistance: ESR (mΩ) Frequency: f (kHz) Ripple Current: I (Arms) Ambient Temperature: TA (°C) Core Temperature: TC (°C) Total Thermal Resistance: Θ (°C/W) Thermal Resistance case-to-ambient: ΘCA (°C/W) Thermal Resistance core-to-case: ΘCC (°C/W) Airflow Speed: v (m/s) Applied Voltage: VA (VDC) Rated Voltage: VR (VDC) Determine ESR at Operating Frequency Use the 10 kHz ESR from the ratings tables. For operation below 10 kHz, the ESR will need to be adjusted using the following equation: ESR - 31.83/(10C) + 31.83/(fC). Determine Thermal Resistance at Operating Frequency and Air Flow Compute Θ = ΘCC + ΘCA. In the ratings tables, ΘCA is for still air. For v = 0 to 5 m/s, multiply ΘCA by [(5 + 17.6(0.10.66)) / (5 + 17.6(v + 0.1)0.66)] Determine Expected Lifetime Look up Expected Lifetime on the graph using VA/VR and TC = TA + I2 (ESR/1000) Θ The maximum allowed temperature rise is 40 °C and the maximum allowed core temperature is 95 °C. Expected Lifetime vs Hot Spot Temperature and Applied DC Voltage 1.6 1.5 1.4 50ºC 1.3 Va / Vr Film High Current, Low Profile for Inverter Applications Expected Lifetime Predictions 60ºC 1.2 70ºC 1.1 1 85ºC 0.9 0.8 1000 10000 100000 1000000 Expected Lifetime (h) CDE Cornell Dubilier • 1605 E. Rodney French Blvd. • New Bedford, MA 02744 • Phone: (508)996-8561 • Fax: (508)996-3830 Film Notice and Disclaimer: All product drawings, descriptions, specifications, statements, information and data (collectively, the “Information”) in this datasheet or other publication are subject to change. The customer is responsible for checking, confirming and verifying the extent to which the Information contained in this datasheet or other publication is applicable to an order at the time the order is placed. All Information given herein is believed to be accurate and reliable, but it is presented without any guarantee, warranty, representation or responsibility of any kind, expressed or implied. Statements of suitability for certain applications are based on the knowledge that the Cornell Dubilier company providing such statements (“Cornell Dubilier”) has of operating conditions that such Cornell Dubilier company regards as typical for such applications, but are not intended to constitute any guarantee, warranty or representation regarding any such matter – and Cornell Dubilier specifically and expressly disclaims any guarantee, warranty or representation concerning the suitability for a specific customer application, use, storage, transportation, or operating environment. The Information is intended for use only by customers who have the requisite experience and capability to determine the correct products for their application. Any technical advice inferred from this Information or otherwise provided by Cornell Dubilier with reference to the use of any Cornell Dubilier products is given gratis (unless otherwise specified by Cornell Dubilier), and Cornell Dubilier assumes no obligation or liability for the advice given or results obtained. Although Cornell Dubilier strives to apply the most stringent quality and safety standards regarding the design and manufacturing of its products, in light of the current state of the art, isolated component failures may still occur. Accordingly, customer applications which require a high degree of reliability or safety should employ suitable designs or other safeguards (such as installation of protective circuitry or redundancies or other appropriate protective measures) in order to ensure that the failure of an electrical component does not result in a risk of personal injury or property damage. Although all product-related warnings, cautions and notes must be observed, the customer should not assume that all safety measures are indicated in such warnings, cautions and notes, or that other safety measures may not be required.