CDM Cornell Dubilier • 140 Technology Place • Liberty, SC 29657 • Phone: (864)843-2277 • Fax: (864)843-3800 • www.cde.com
Type 947C High Capacitance, High Current, DC Link Capacitors
Type 947C series uses the most advanced metallized
film technology for long life, high reliability in DC
link applications. Their high-voltage and high-current
ratings allow for replacement of series-parallel banks of
aluminum electrolytic capacitors in high ripple current
applications.
Applications
Inverters: >5kW
Renewable Energy Inverters: Wind, Solar, Fuel Cell
Aircraft Inverters: Power Supplies and Motor Drives
Transportation: Electric Vehicles, Traction
Industrial: Welders, Motor Drives, Elevators, and
Overhead Cranes
Specifications
Capacitance Range:
Tolerance:
Rated Voltage:
Operating Temperature Range With Ripple:
Maximum rms Current:
Maximum rms Voltage:
Test Voltage Between Terminals @ 25 ºC:
Test Voltage Between Terminals and Case @ 25 ºC:
Life Test:
160 µF to 730 µF
±10%
800 Vdc, 1000 Vdc, 1200 Vdc
–40 ºC to +85 ºC
60 A @ +55 ºC
<230 Vac
150% rated DC voltage for 10 s
4 kVac @ 50/60 Hz for 1 min
5000 h @ +85 ºC, rated voltage
Metallized Polypropylene Dielectric
1. Rated Current is for temperature rise of +40 ºC at 1–20 kHz.
2. θcc is core-to-case thermal resistance at 0–10 kHz. For higher frequency see Expected Lifetime Predictions.
3. θca is case-to-ambient thermal resistance for still air. For moving air see Expected Lifetime Predictions.
Ratings
Rated D H A Rated Current Typical ESR Series Thermal Resistance
Catalog Cap Voltage Dia. Height Case Area ΔT = 40 ºC @ 10 kHz Inductance θcc θca Mass
Part Number (µF) (Vdc) (mm) (mm) (mm2) (A) (mΩ) (nH) (ºC/W) (ºC/W) (kg)
947C361K801CAMS 360 800 92 97 40100 72 1.3 60 3.0 2.9 0.9
947C491K801CBMS 490 800 92 120 46700 70 1.6 75 2.6 2.5 1.0
947C601K801CCMS 600 800 92 145 53700 68 2.0 85 2.2 2.1 1.2
947C731K801CDMS 730 800 92 170 60800 68 2.3 95 1.9 1.9 1.3
947C231K102CAMS 230 1000 92 97 40100 67 1.5 60 3.0 2.9 0.9
947C311K102CBMS 310 1000 92 120 46700 63 2.0 75 2.6 2.5 1.0
947C391K102CCMS 390 1000 92 145 53700 62 2.4 85 2.2 2.1 1.2
947C471K102CDMS 470 1000 92 170 60800 60 2.9 95 1.9 1.9 1.3
947C161K122CAMS 160 1200 92 97 40100 62 1.8 60 3.0 2.9 0.9
947C211K122CBMS 210 1200 92 120 46700 57 2.4 75 2.6 2.5 1.0
947C271K122CCMS 270 1200 92 145 53700 56 2.9 85 2.2 2.1 1.2
947C321K122CDMS 320 1200 92 170 60800 56 3.4 95 1.9 1.9 1.3
Complies with the EU Directive 2002/95/EC requirement restricting the use of
Lead (Pb), Mercury (Hg), Cadmium (Cd), Hexavalent chromium (Cr(VI)), PolyBro-
minated Biphenyls (PBB) and PolyBrominated Diphenyl Ethers (PBDE).
CDM Cornell Dubilier • 140 Technology Place • Liberty, SC 29657 • Phone: (864)843-2277 • Fax: (864)843-3800 • www.cde.com
Type 947C High Capacitance, High Current, DC Link Capacitors
Outline Drawings
Part Numbering System
947C 361 K 801 C A M S
Type Capacitance Tolerance Voltage Diameter D Height H Terminal Mounting
947C 361 = 360 µF K = ±10 % 801 = 800 Vdc C = 92 mm A = 97 mm I = M5 Insert blank = no stud
731 = 730 µF 102 = 1000 Vdc B = 120 mm Threaded S = M12 Stud
122 = 1200 Vdc C = 145 mm M = M8 Stud Threaded
D = 170 mm Threaded
0.630"±0.039"
(16.0mm±1.0mm)
H±0.079"
(H±2.0mm)
3.622"
(92.0mm)
Max.
1.772"
±0.039"
(45.0mm
±1.0mm)
M12x1.75THD
M8x1.25
THDStuds
0.787"±0.039"
(20.0mm±1.0mm)
0.630"±0.039"
(16.0mm±1.0mm)
H±0.079"
(H±2.0mm)
3.622"
(92.0mm)
Max.
M12x1.75THD
M5x4.0mm
Min.
M5ThreadedInsertTerminalsM8ThreadedStudTerminals
OptionalMountingStudOptionalMountingStud
2XØ0.687"
(17.5mm)
2XØ0.813"
(20.7mm)
0.236"±0.039"
(6.0mm±1.0mm)
0.236"±0.039"
(6.0mm±1.0mm)
1.772"
±0.039"
(45.0mm
±1.0mm)
CORNELLDUBILIERCORNELLDUBILIER
Max.Torque
2.5Nm(22inxlb)
Max.Torque
8.5Nm(75inxlb)
CDM Cornell Dubilier • 140 Technology Place • Liberty, SC 29657 • Phone: (864)843-2277 • Fax: (864)843-3800 • www.cde.com
Type 947C High Capacitance, High Current, DC Link Capacitors
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=m² T, Ta & Tc=°C
C=µF θ, θca & θcc =°C/W
ESR=mΩ v=m/s
f=kHz Va &Vr=Vdc
I=A
NOTE: The temperature rise in the 947C is I²(ESR) times the
thermal resistance θ. The ESR is mainly the metal resistance;
the metal resistance is the 10 kHz ESR. For operation below 10
kHz add the dielectric resistance. It is the dielectric dissipation
factor—no more than 0.0002—times the capacitive reactance,
i.e., 0.0002 ⁄(2πfC). 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 θ as the sum of core-to-case
thermal resistance θcc and case-to-ambient thermal resistance
θca. Both are in the Ratings table but θca is for still air and θcc
is for 10 kHz or less. For frequency > 10 kHz multiply θcc by
[1+(f –10)/100], e.g., for 75 kHz multiply θcc by 1.65. For moving
air use the capacitor surface area A and airflow speed v to calculate
θca = 1 ⁄[A(5+17(v+0.1)0.66)].
3. Compute Va ⁄Vr and the core temperature T.
T = Ta + I²(ESR)θ
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.
Expected Lifetime Predictions
Permissible Voltage Surge Duty for 100,000 Hour
Life Expectancy at 50 ºC Core Temperature
Factor Duration Frequency
1.67x t≤ 100 ms 1x/day
1.50x t≤ 5 minutes 1x/day
1.30x t≤ 2.5 hours 1x/day
1.10x t≤ 9.6 hours 1x/day
1.00x balance (11.9 h) 1x/day
CDM Cornell Dubilier • 140 Technology Place • Liberty, SC 29657 • Phone: (864)843-2277 • Fax: (864)843-3800 • www.cde.com
Type 947C High Capacitance, High Current, DC Link Capacitors
Typical Performance Curves
490 µF 800 V ESR vs Frequency and Temperature
1.0
1.5
2.0
2.5
100 1000 10000 100000
Frequency (Hz)
ESR (m�
)
45 °C
65 °C
25 °C
0 °C
85 °C
–20 °C
–40 °C
230 µF 1000 V ESR vs Frequency and Temperature
1.0
1.5
2.0
2.5
3.0
100 1000 10000 100000
Frequency (Hz)
ESR (m�
)
45 °C
65 °C
25 °C
0 °C
85 °C
–20 °C
–40 °C
160 µF 1200 V ESR vs Frequency and Temperature
1.0
1.5
2.0
2.5
3.0
3.5
4.0
100 1000 10000 100000
Frequency (Hz)
ESR (m�
)
45 °C
65 °C
25 °C
0 °C
85 °C
–20 °C
–40 °C
490 µF 800 V Rated Ripple Current, Still Air, 5 kh Life
0
10
20
30
40
50
60
70
80
10 100 1000 10000 100000
Frequency (Hz)
Rated Ripple Current (A)
45 °C
55 °C
65 °C
75 °C
85 °C
230 µF 1000 V Rated Ripple Current, Still Air, 5kh Life
0
10
20
30
40
50
60
70
80
10 100 1000 10000 100000
Frequency (Hz)
Rated Ripple Current (A)
45 °C
55 °C
65 °C
75 °C
85 °C
160 µF 1200 V Rated Ripple Current, Still Air, 5kh Life
0
10
20
30
40
50
60
70
80
10 100 1000 10000 100000
Frequency (Hz)
Rated Ripple Current (A)
45 °C
55 °C
65 °C
75 °C
85 °C
