UTOR
Series
Large Can
Toroidal Design
For Inverter/EV
Application
Ultra High Ripple
Long Life
High Vibration
and Low Thermal
Resistance
Three Viable
Cooling Options
The new UTOR series has been specifically developed to reduce the size, weight and cost of high
performance inverters by maximizing ripple current and thus reducing the number of conventional
capacitors required per bank. The ultra high ripple currents, high vibration resistance and high
transient voltage protection make the UTOR ideal for EV inverters or any application where extreme
conditions must be met. The patented toroidal design of the UTOR also offers the user forced air,
heat-sink and fluid convection cooling options, not available with traditional capacitors, to further
enhance the operating performance.
Summary of Specifications
Screw terminals, high ripple Metric thread.
Capacitance range: 1,500 to 6,800µF.
Voltage range: 350 to 450VDC.
Operating temperature range: 40 C to 105 C.
Leakage current: 0.02CV(µA) or 5mA, whichever is smaller, after 5 minutes at
Standard capacitance tolerance: 20%
Nominal case size: 3.000” diameter in lengths from 3.125” to 6.625”
Rated lifetime: 5,000 hours at 105 C with rated ripple current applied.
25 C.
TOROIDAL -105 C
UTOR
436
United Chemi-Con, Inc. 9801 W. Higgins Road, Rosemont, IL 60018 Tel 847-696-2000 Fax 847-696-9278 www.chemi-con.com
UTOR Series
UTOR Construction and Cooling Options
The UTOR is designed to provide the ultra high ripple current capability required for the next
generation of inverters. The patented toroidal construction offers optimum heat dissipation at the very
core (traditional “hot-spot”) of the capacitor’s element, resulting in a reduced internal temperature
rise and allowing for higher ripple current.
The element employs an extended cathode foil for intimate contact to the case, creating an internal
heat sink and consequently better dissipation via conduction, while the outer case is crimped into the
element for better dissipation via convection. The UTOR’s toroidal construction is ideal for cooling
techniques including heat-sink posts, forced air, and even fluid convection. There are numerous
mounting options, which can be customized to the designer’s mechanical needs and intended
method of cooling. Please contact United Chemi-Con for further details.
Multiple tabs for lower ESR and
improved heat dissipation via
the terminals.
Patented toroidal construction for
improved heat dissipation via
convection or conduction.
Insulator to isolate
tabs from case.
High Vf anode foil
for improved transient
voltage protection.
New exceptionally low
ESR spacer pad and
electrolyte combination
for higher ripple current.
Crimped case to
internal element for high
vibration resistance and
improved heat dissipation
via convection.
Extended cathode for internal
heat sink and improved heat
dissipation via conduction.
Indented case bottom for intimate
contact to heat sink.
TOROIDAL -105 C
UTOR
United Chemi-Con, Inc. 9801 W. Higgins Road, Rosemont, IL 60018 Tel 847-696-2000 Fax 847-696-9278 www.chemi-con.com
437
UTOR Series
UTOR Specifications
Item
Operating Temperature Range
Rated Voltage Range
Capacitance Range
Capacitance Tolerance
Leakage Current
I
40 to 105 C
350 to 450VDC
1,500 to 6,800 F at
20% ( M ) at
25 C, 120Hz
Characteristics
25 C, 120Hz
25 C.
0.02CV ( A ) or 5mA, whichever is smaller, after 5 minutes at
Where I = Leakage current ( A ), C = Nominal capacitance ( F ) and V = Rated voltage ( V )
Ripple Current Multipliers
Refer to Section 4 of the
Mini-Glossary for explanation
of Ripple Current Multipliers.
Ambient Temperature ( C )
45 C
2.55
65 C
2.30
85 C
1.75
105 C
1.00
Frequency (Hz )
120Hz
1.0
300Hz
1.1
1kHz
1.3
3kHz
1.4
Cooling
Vair
Clamp Mount
Heat-Sink
Fluid Convection
Static
1.00
1.20
1.26
1.0m /s
1.20
1.44
1.51
2.0m /s
1.28
1.53
1.61
3.0m /s
1.34
1.61
1.69
≥
4.0m /s
1.40
1.68
1.76
Life Validation Test
The following specifications shall be satisfied when the capacitors are restored to 25 C
after subjecting them to the DC rated voltage for 5,000 hours at 105 C with the rated ripple
current applied. The sum of DC voltage and peak AC voltage must not exceed the full rated
voltage of the capacitors.
Capacitance change:
≤
20% of initial measured value
Tan ( DF )
:
≤
200% of initial specified value
Leakage current
:
≤
initial specified value
Shelf Test
The following specifications shall be satisfied when the capacitors are restored to 25 C after
exposing them for 1,000 hours at 105 C without voltage applied. The rated voltage shall be
applied to the capacitors for a minimum of 30 minutes, at least 24 hours and not more than
48 hours before the measurements.
Capacitance change:
≤
20% of initial measured value
Tan ( DF )
:
≤
200% of initial specified value
Leakage current
:
≤
initial specified value
Part Numbering System for UTOR Series
UTOR
400
LG
472
M
76X143
CT
When ordering, always specify complete catalog number for UTOR Series.
Lead Code: CT = High Post M5 Screw Thread.
Case Code: Expressed in Millimeters.
Capacitance Tolerance: M = 20%
Capacitance Value: Expressed in Microfarads. The first two digits are
significant figures, and the third digit indicates the number of zeros
for capacitance of 100 F or more. R indicates the decimal point for
capacitance less than 100 F (e.g. R47 = .47 F; 4R7 = 4.7 F;
47R = 47 F; 471 = 470 F; 472 = 4,700 F; 473 = 47,000 F ).
Lead Configuration: LG = Screw Terminals.
Rated Voltage: Expressed in Volts (e.g. 400 = 400WVDC).
Series Name: Indicates Basic Capacitor Design.
TOROIDAL -105 C
UTOR
438
United Chemi-Con, Inc. 9801 W. Higgins Road, Rosemont, IL 60018 Tel 847-696-2000 Fax 847-696-9278 www.chemi-con.com
UTOR Series
Diagram of Dimensions
Toroidal Large Can / Screw Terminals
F
Unit: inches and mm
M5
Thread
45
Toroidal
Core
Vent
A
S
T
J
B
PVC
Sleeve
L
Crimped
Case
L
'
H
MAX.
Optional mounting styles are available upon request.
Please contact United Chemi-Con for details.
A
'
D
D
'
Insulating
Disk
Terminal Specifications in Millimeters
Terminal
Code
CT
Thread
Thread
Depth
9.0
J
0.8
Height
6.4
Ø
S
0.25
Diameter
Ø
T
0.25
Diameter
Terminal Specifications in Inches
Terminal
Code
CT
Thread
Thread
Depth
0.354
J
0.8
Height
0.250
Ø
S
0.25
Diameter
Ø
T
0.25
Diameter
M5
13.0
18.4
M5
0.512
0.725
Diameter Dimensions and Terminal Spacing in Millimeters
Bare Can
Ø
D
Diameter Dimensions and Terminal Spacing in Inches
Bare Can
Ø
D
With Sleeve
Ø
D
'
Core Diameter
Ø
A
Ø
A
'
1.0
76.2
Max.
78.2
0.25
17.7
0.25
20.1
F
0.40
31.75
With Sleeve
Ø
D
'
Core Diameter
Ø
A
Ø
A
'
0.039
3.000
Max.
3.078
0.010
0.698
0.010
0.790
F
0.016
1.250
Length Dimensions in Millimeters
Case
*Code*
76X79
76X92
76X105
76X117
76X130
76X143
76X155
76X168
Bare Can
L
2.0
79
92
105
117
130
143
155
168
With Sleeve
L
'
.Max.
83
96
109
121
134
147
169
172
Height
H
.Max.
L
L
L
L
L
L
L
L
12
12
12
12
12
12
12
12
B
0.80
9.5
9.5
9.5
9.5
9.5
9.5
9.5
9.5
Length Dimensions in Inches
Case
*Code*
3X3.125
3X3.625
3X4.125
3X4.625
3X5.125
3X5.625
3X6.125
3X6.625
Bare Can
L
0.079
3.125
3.625
4.125
4.625
5.125
5.625
6.125
6.625
With Sleeve
L
'
.Max.
3.268
3.780
4.291
4.764
5.276
5.757
6.260
6.772
L
L
L
L
L
L
L
L
Height
H
.Max.
0.472
0.472
0.472
0.472
0.472
0.472
0.472
0.472
B
0.032
0.374
0.374
0.374
0.374
0.374
0.374
0.374
0.374
TOROIDAL -105 C
UTOR
*
The case code does not indicate actual size.
United Chemi-Con, Inc. 9801 W. Higgins Road, Rosemont, IL 60018 Tel 847-696-2000 Fax 847-696-9278 www.chemi-con.com
439
UTOR Series
Standard Voltage Ratings - LG/Screw Terminals
Rated
Voltage
(WVDC)
Capacitance
(µF )
Catalog
Part Number
Nominal
Case Size*
D L ( mm )
Nominal
Case Size*
D L (inches)
Maximum ESR
( m
Ω
) at
25 C, 120Hz
350 Volts
400 Volts Surge
2,200
2,700
3,300
3,900
4,700
5,600
6,800
1,800
2,200
2,700
3,300
3,900
4,700
5,600
1,500
1,800
2,200
2,700
3,300
3,900
4,700
UTOR350LG222M76X79CT
UTOR350LG272M76X92CT
UTOR350LG332M76X105CT
UTOR350LG392M76X117CT
UTOR350LG472M76X130CT
UTOR350LG562M76X143CT
UTOR350LG682M76X168CT
UTOR400LG182M76X79CT
UTOR400LG222M76X92CT
UTOR400LG272M76X105CT
UTOR400LG332M76X117CT
UTOR400LG392M76X130CT
UTOR400LG472M76X143CT
UTOR400LG562M76X168CT
UTOR450LG152M76X79CT
UTOR450LG182M76X92CT
UTOR450LG222M76X105CT
UTOR450LG272M76X117CT
UTOR450LG332M76X130CT
UTOR450LG392M76X155CT
UTOR450LG472M76X168CT
76
76
76
76
76
76
76
76
76
76
76
76
76
76
76
76
76
76
76
76
76
79
92
105
117
130
143
168
79
92
105
117
130
143
168
79
92
105
117
130
155
168
3.000
3.000
3.000
3.000
3.000
3.000
3.000
3.000
3.000
3.000
3.000
3.000
3.000
3.000
3.000
3.000
3.000
3.000
3.000
3.000
3.000
3.125
3.625
4.125
4.625
5.125
5.625
6.625
3.125
3.625
4.125
4.625
5.125
5.625
6.625
3.125
3.625
4.125
4.625
5.125
6.125
6.625
55
44
37
31
26
22
18
62
51
42
34
29
24
20
106
88
72
59
48
41
34
400 Volts
450 Volts Surge
450 Volts
500 Volts Surge
*
The case sizes in table are with no sleeve, refer to diagram for case sizes with sleeve.
Standard Ripple Ratings - LG/Screw Terminals
Rated
Voltage
(WVDC)
Capacitance
(µF )
Maximum
I rms (A) at
105 C, 120Hz
Maximum
I rms (A) at
85 C, > 3kHz
Maximum
I rms (A) at
85 C, > 3kHz
1.0 m /s Air
35.6
42.0
49.1
55.9
64.8
73.2
87.0
32.3
37.9
44.4
51.5
58.5
67.0
79.1
29.4
34.4
40.0
46.5
53.8
63.2
72.3
Maximum
I rms (A) at
85 C, > 3kHz
1.0 m /s Air + Heat Sink
42.7
50.5
58.9
67.0
77.3
87.8
104.4
38.8
45.5
53.3
61.7
70.2
80.4
94.9
35.3
41.2
48.0
55.7
64.6
75.8
86.8
350 Volts
400 Volts Surge
2,200
2,700
3,300
3,900
4,700
5,600
6,800
1,800
2,200
2,700
3,300
3,900
4,700
5,600
1,500
1,800
2,200
2,700
3,300
3,900
4,700
12.1
14.3
16.7
19.0
21.9
24.9
29.6
11.0
12.9
15.1
17.5
19.9
22.8
26.9
10.0
11.7
13.6
15.8
18.3
21.5
24.6
29.6
35.0
40.9
46.6
53.7
61.0
72.5
27.0
31.6
37.0
42.9
48.8
55.9
65.9
24.5
28.7
33.3
38.7
44.8
52.7
60.3
400 Volts
450 Volts Surge
450 Volts
500 Volts Surge
TOROIDAL -105 C
UTOR
IMPORTANT NOTICE:
The values listed in the fourth, fifth and sixth columns above are intended to serve as examples of ripple capability at 85 C ambient and > 3kHz
applications under various environmental conditions. The values were determined by applying the multipliers suggested in the specification to the
105 C, 120Hz ratings in the third column above. Values at ambient, frequency and environmental conditions other than those listed above should
be determined by using the given multiplier with the 105 C, 120Hz ratings.
440
United Chemi-Con, Inc. 9801 W. Higgins Road, Rosemont, IL 60018 Tel 847-696-2000 Fax 847-696-9278 www.chemi-con.com
