Type 947C
High Capacitance, High Current, DC Link Capacitors
Metallized Polypropylene Dielectric
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
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
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:
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).
Ratings
Rated
Catalog
Part Number
947C361K801CAMS
947C491K801CBMS
947C601K801CCMS
947C731K801CDMS
947C231K102CAMS
947C311K102CBMS
947C391K102CCMS
947C471K102CDMS
947C161K122CAMS
947C211K122CBMS
947C271K122CCMS
947C321K122CDMS
Cap
(µF)
360
490
600
730
230
310
390
470
160
210
270
320
Voltage
(Vdc)
800
800
800
800
1000
1000
1000
1000
1200
1200
1200
1200
D
Dia.
(mm)
92
92
92
92
92
92
92
92
92
92
92
92
H
(mm)
97
120
145
170
97
120
145
170
97
120
145
170
A
(mm
2
)
40100
46700
53700
60800
40100
46700
53700
60800
40100
46700
53700
60800
Rated Current Typical ESR
ΔT = 40 ºC
(A)
72
70
68
68
67
63
62
60
62
57
56
56
@ 10 kHz
(mΩ)
1.3
1.6
2.0
2.3
1.5
2.0
2.4
2.9
1.8
2.4
2.9
3.4
Series
Inductance
(nH)
60
75
85
95
60
75
85
95
60
75
85
95
Thermal Resistance
θcc
(ºC/W)
3.0
2.6
2.2
1.9
3.0
2.6
2.2
1.9
3.0
2.6
2.2
1.9
θca
(ºC/W)
2.9
2.5
2.1
1.9
2.9
2.5
2.1
1.9
2.9
2.5
2.1
1.9
Mass
(kg)
0.9
1.0
1.2
1.3
0.9
1.0
1.2
1.3
0.9
1.0
1.2
1.3
Height Case Area
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.
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
M5 Threaded Insert Terminals
3.622"
(92.0mm)
Max.
M8 Threaded Stud Terminals
3.622"
(92.0mm)
Max.
Max. Torque
2.5 Nm (22 in x lb)
M5 x 4.0mm
Min.
2X Ø 0.687"
(17.5mm)
0.236" ±0.039"
(6.0mm ±1.0mm)
1.772"
±0.039"
(45.0mm
±1.0mm)
Max. Torque
8.5 Nm (75 in x lb)
2X Ø 0.813"
(20.7mm)
1.772"
±0.039"
(45.0mm
±1.0mm)
M8 x 1.25
THD Studs
0.236" ±0.039"
(6.0mm ±1.0mm)
CORNELL DUBILIER
CORNELL DUBILIER
0.787" ±0.039"
(20.0mm ±1.0mm)
H ± 0.079"
(H ± 2.0mm)
H ± 0.079"
(H ± 2.0mm)
0.630" ±0.039"
(16.0mm ±1.0mm)
0.630" ±0.039"
(16.0mm ±1.0mm)
M12 x 1.75 THD
M12 x 1.75 THD
Optional Mounting Stud
Optional Mounting Stud
Part Numbering System
947C
Type
947C
361
Capacitance
361
= 360 µF
731
= 730 µF
K
Tolerance
K
= ±10 %
801
Voltage
102
= 1000 Vdc
122
= 1200 Vdc
C
Diameter D
A
Height H
A
= 97 mm
B
= 120 mm
C
= 145 mm
D
= 170 mm
M
Terminal
I
= M5 Insert
Threaded
M
= M8 Stud
Threaded
S
Mounting
blank
= no stud
S
= M12 Stud
Threaded
801
= 800 Vdc
C =
92 mm
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
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=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.
Permissible Voltage Surge Duty for 100,000 Hour
Life Expectancy at 50 ºC Core Temperature
Factor
1.67x
1.50x
1.30x
1.10x
1.00x
Duration
t≤ 100 ms
t≤ 5 minutes
t≤ 2.5 hours
t≤ 9.6 hours
balance (11.9 h)
Frequency
1x/day
1x/day
1x/day
1x/day
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
2.5
80
70
85 °C
490 µF 800 V Rated Ripple Current, Still Air, 5 kh Life
45 °C
55 °C
65 °C
75 °C
85 °C
2.0
ESR (m½)
65 °C
45 °C
25 °C
Rated Ripple Current (A)
60
50
40
30
20
10
1.5
0 °C
–20 °C
–40 °C
1.0
100
1000
Frequency (Hz)
10000
100000
0
10
100
1000
Frequency (Hz)
10000
100000
230 µF 1000 V ESR vs Frequency and Temperature
3.0
80
70
230 µF 1000 V Rated Ripple Current, Still Air, 5kh Life
45 °C
55 °C
65 °C
75 °C
Rated Ripple Current (A)
2.5
ESR (m½)
60
50
40
30
20
10
0
2.0
85 °C
65 °C
45 °C
25 °C
1.5
85 °C
0 °C
–20 °C
–40 °C
1.0
100
1000
Frequency (Hz)
10000
100000
10
100
1000
Frequency (Hz)
10000
100000
160 µF 1200 V ESR vs Frequency and Temperature
4.0
3.5
Rated Ripple Current (A)
80
70
60
50
40
30
20
10
0
10
160 µF 1200 V Rated Ripple Current, Still Air, 5kh Life
45 °C
55 °C
65 °C
75 °C
85 °C
3.0
ESR (m½)
2.5
2.0
1.5
1.0
100
85 °C
65 °C
45 °C
25 °C
0 °C
–20 °C
–40 °C
1000
Frequency (Hz)
10000
100000
100
1000
Frequency (Hz)
10000
100000
CDM Cornell Dubilier
•
140 Technology Place
•
Liberty, SC 29657
•
Phone: (864)843-2277
•
Fax: (864)843-3800
•
www.cde.com
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