DFWA
Series
Film
Wrapped
Polyester
Axial Lead
General Purpose
85 C
Maximum
Temperature
FILM - AXIAL LEAD
DFWA
The DFWA series is the standard general purpose axial film capacitor series from UCC/NCC. These
capacitors have a 10% tolerance and are available with voltages from 250VDC to 630VDC. The
DFWA series capacitors are ideal for use as noise limiters where the height of the component is an
important design consideration.
Summary of Specifications
Axial lead terminals.
Capacitance range: 0.033 to 10µF.
Voltage range: 250 to 630VDC; 125 to 250VAC.
Operating temperature range: 40 C to 85 C.
Standard capacitance tolerance: 10%
Nominal case size ( W H T ): 18.0 10.5 5.5mm to 44.0
Rated lifetime: 1,000 hours at 85 C.
39.0 30.5mm.
United Chemi-Con, Inc. 9801 W. Higgins Road, Rosemont, IL 60018 Tel 847-696-2000 Fax 847-696-9278 www.chemi-con.com
73
DFWA Series
DFWA Specifications
Item
Operating Temperature Range
Rated Voltage Range
Capacitance Range
Capacitance Tolerance
Dissipation Factor ( Tan )
Withstand Voltage
40 to
85 C
Characteristics
250 to 630VDC; 125 to 250VAC
0.033 to 10 F
10% ( K ) at
≤
1% at
20 C, 1kHz
20 C, 1kHz
Terminal-to-Terminal:
In accordance with JIS-C-5102 test conditions, there shall be no capacitor degradation after
applying 150% of the DC rated voltage for 1 minute.
Terminal-to-Resin Coating:
In accordance with JIS-C-5102 test conditions, there shall be no capacitor degradation after
applying 200% of the DC rated voltage for 5 seconds.
Insulation Resistance ( IR )
Terminal-to-Terminal in accordance with JIS-C-5102 test conditions.
DC Rated Voltage ( V )
DC Applied Voltage ( V )
Insulation
Resistance
≤
0.33 F
> 0.33 F
250
250
400
250
≥
9,000 MΩ
≥
3,000 C
R
*
= MΩ
630
500
Low and High Temperature
Characteristics
In accordance with JIS-C-5102 test conditions, the measurements for stability of electrical
performance of capacitors at 25 C and 85 C are shown in the following table.
Temperature ( C )
40 3 C
7%,
—
—
0%
≤
0.33 F
> 0.33 F
85 2 C
—
≥
900 MΩ
≥
300 C
R
*
= MΩ
FILM - AXIAL LEAD
Capacitance Change
Insulation
Resistance
DFWA
Humidity Load Life Test
In accordance with JIS-C-5102 test conditions, the following specifications shall be satisfied
when the capacitors are cooled and kept at 20 C for approximately 16 hours after applying
the DC rated voltage for 500 24 0 hours at 40 2 C, 90 - 95% RH. After the initial load
test, the withstand voltage (terminal-to-terminal) shall be tested by applying 130% of the DC
rated voltage through a series resistor of 20 -1,000
Ω
/volt for 1 minute.
Appearance
: no serious degradation
Capacitance change :
≤
10% of initial measured value
Insulation resistance :
≥
2,700 MΩ for
≤
0.33 F
:
≥
900 C
R
*
= MΩ for > 0.33 F
Tan ( DF )
:
≤
1.1%
Load Life Test
In accordance with JIS-C-5102 test conditions, the following specifications shall be satisfied
when the capacitors are restored to 20 C after applying 125% of the DC rated voltage at
85 2 C for 1,000 48, 0 hours. The voltage shall be applied through a series resistor of
20 -1,000
Ω
/volt.
Appearance
: no serious degradation
Capacitance change :
≤
7% of initial measured value
Insulation resistance :
≥
2,700 MΩ for
≤
0.33 F
:
≥
900 C
R
*
= MΩ for > 0.33 F
Tan ( DF )
:
≤
1.1%
Standard
*
C
R
= Nominal Capacitance in F
Satisfies JIS-C-5115 unless otherwise specified.
74
United Chemi-Con, Inc. 9801 W. Higgins Road, Rosemont, IL 60018 Tel 847-696-2000 Fax 847-696-9278 www.chemi-con.com
DFWA Series
Diagram of Dimensions
Film /Axial Lead
Unit: mm
Polyester Adhesive Tape Enclosure
Solder Plated Copper
Ø
d
H
Max.
30
Min.
W
Max.
30
Min.
T
Max.
Lead Diameter
W max.
18.0
23.0
29.0
34.0
44.0
Ø
d
Refer to Standard Ratings Tables for H and T dimensions.
0.6
0.6
0.8
0.8
1.0
FILM - AXIAL LEAD
Part Numbering System for DFWA Series
DFWA
2G
104
K
When ordering, always specify complete catalog number for DFWA Series.
DFWA
Capacitance Tolerance: K =
10%
Capacitance Value: Expressed in picofarads. The first two digits are
significant figures, and the third digit indicates the number of zeros
following these figures ( e.g. 104 = 100,000pF = 0.1 F ).
Voltage Code: 2E = 250VDC; 2G = 400VDC; 2J = 630VDC;
Series Name: Indicates Basic Capacitor Design.
Standard Voltage Ratings - Film/Axial Lead
Rated
Voltage
( WVDC)
Capacitance
(µF )
Catalog
Part Number
W max.*
Width
(mm)
H max.*
Height
(mm)
T max.*
Thickness
(mm)
250 Volts
0.1
0.15
0.22
0.33
0.47
0.68
1.0
1.5
2.2
3.3
4.7
6.8
10
DFWA2E104K
DFWA2E154K
DFWA2E224K
DFWA2E334K
DFWA2E474K
DFWA2E684K
DFWA2E105K
DFWA2E155K
DFWA2E225K
DFWA2E335K
DFWA2E475K
DFWA2E685K
DFWA2E106K
18.0
18.0
18.0
23.0
23.0
23.0
29.0
29.0
29.0
34.0
34.0
44.0
44.0
10.5
11.5
11.5
11.0
12.0
13.0
14.5
16.0
18.0
21.0
23.5
24.0
30.0
5.5
6.5
6.5
6.0
7.0
8.5
8.0
9.5
11.5
11.5
14.0
14.5
16.5
*
See diagram of dimensions.
United Chemi-Con, Inc. 9801 W. Higgins Road, Rosemont, IL 60018 Tel 847-696-2000 Fax 847-696-9278 www.chemi-con.com
75
DFWA Series
Standard Voltage Ratings - Film/Axial Lead
Rated
Voltage
( WVDC)
Capacitance
(µF )
Catalog
Part Number
W max.*
Width
(mm)
H max.*
Height
(mm)
T max.*
Thickness
(mm)
400 Volts
0.047
0.068
0.1
0.15
0.22
0.33
0.47
0.68
1.0
1.5
2.2
3.3
4.7
6.8
0.033
0.047
0.068
0.1
0.15
0.22
0.33
0.47
0.68
1.0
1.5
2.2
DFWA2G473K
DFWA2G683K
DFWA2G104K
DFWA2G154K
DFWA2G224K
DFWA2G334K
DFWA2G474K
DFWA2G684K
DFWA2G105K
DFWA2G155K
DFWA2G225K
DFWA2G335K
DFWA2G475K
DFWA2G685K
DFWA2J333K
DFWA2J473K
DFWA2J683K
DFWA2J104K
DFWA2J154K
DFWA2J224K
DFWA2J334K
DFWA2J474K
DFWA2J684K
DFWA2J105K
DFWA2J155K
DFWA2J225K
18.0
18.0
23.0
23.0
23.0
29.0
29.0
34.0
34.0
44.0
44.0
44.0
44.0
44.0
18.0
23.0
23.0
23.0
29.0
29.0
29.0
34.0
34.0
44.0
44.0
44.0
10.5
11.5
11.0
12.5
13.5
14.5
16.5
19.0
21.5
21.5
24.5
29.0
33.5
39.0
11.5
10.5
12.0
13.0
14.0
15.5
18.0
20.5
23.0
23.0
28.5
33.0
6.0
7.0
6.5
7.5
9.0
8.5
10.0
9.5
12.0
12.0
15.0
19.5
24.5
30.5
7.0
6.0
7.0
8.5
8.0
9.5
11.5
10.5
13.0
13.0
15.5
20.0
630 Volts
FILM - AXIAL LEAD
DFWA
*
See diagram of dimensions.
76
United Chemi-Con, Inc. 9801 W. Higgins Road, Rosemont, IL 60018 Tel 847-696-2000 Fax 847-696-9278 www.chemi-con.com
DFWA Series Technical Data
1. Storage
The DFWA series film capacitors must be stored between
40 C to 85 C.
6. Maximum Allowable AC Voltage for Sine Waves
The following graphs indicate the maximum allowable AC
voltage for sine waves for various capacitance ratings of
the DFWA series film capacitors at 85 C maximum.
DFWA 250VDC, 125VAC
Voltage (Vrms)
+85°C Max.
2. Operating Temperature
Generally, the operating temperature is the ambient tem-
perature; however, the operating temperature will be the
surface temperature of the capacitor if self-heating occurs
due to ripple current or a charge-discharge current, or if
surface heating is caused by other components.
125
3. Rated AC Voltage
If the DFWA series capacitors are used in an AC circuit, 50
to 60 Hz and within an operating temperature of 40 C to
85 C (including self-heating), the rated AC voltage must
not exceed the values shown in
Table 1.
Table 1.
Rated AC Voltage.
50
30
20
10
0.1µF
Rated Voltage VDC
Rated Voltage VAC
250
125
400
200
630
250
5
3
2
1
2
3
4 5
10
20
30 40 50
100
10µF
1µF
4. Voltage Derating for Pulse Waves
The voltage derating rate for pulse waves at a maximum
operating temperature of 85 C is shown in
Figure 1.
Waveforms for Vp-p and Ep-p (sinusoidal AC voltage) and
the formula for determining the frequency (Hz ) are shown
in
Figure 2.
Figure 1.
Voltage Derating Rate for Pulse Waves at
Vp-p/Ep-p (%)
100
80
60
Frequency (kHz)
DFWA 400VDC, 200VAC
Voltage (Vrms)
+85°C Max.
200
85 C.
µ
s
10
s
5
µ
FILM - AXIAL LEAD
t =
250
µ
s
s
0
µ
10
µ
s
50
µ
s
25
100
DFWA
50
s
1
µ
40
30
20
µ
s
0.5
µ
s
0.2
µ
s
0.1
30
20
3.3µF
10
6.8µF
0.47µF
1
2
3
4 5
10
20
30 40 50
100
0.047µF
10
0.1
0.2
0.5
1
2
5
10
20
50
100
5
Frequency (kHz)
Frequency (kHz)
Figure 2.
Pulse Wave and Sinusoidal Wave at
Vp-p
85 C.
Ep-p
DFWA 630VDC, 250VAC
Voltage (Vrms)
250
200
+85°C Max.
t
f
T
1
T
Ep-p
Sinusoidal AC Voltage
100
5. Maximum Pulse Voltage Moving Rate
For the DFWA series film capacitors, the maximum pulse
voltage moving rate (permissible dv/dt), not repeatable, is
specified in
Table 2.
If there is a possibility of exceeding the
spike surge indicated, please connect a resistor in series.
Table 2.
Maximum Pulse Voltage Moving Rate.
Lead Spacing
(mm)
18
23
29
34
44
Maximum Pulse Moving Rate ( V/µs)
250VDC
30
20
15
12
8
400VDC
90
50
35
25
15
630VDC
120
65
45
35
20
50
30
20
2.2µF
10
0.1µF
0.01µF
5
1
2
3
4 5
10
20
30 40 50
100
Frequency (kHz)
United Chemi-Con, Inc. 9801 W. Higgins Road, Rosemont, IL 60018 Tel 847-696-2000 Fax 847-696-9278 www.chemi-con.com
77
