Type 550C 105 °C High Ripple, Inverter Grade, Aluminum
Ultra-Ripple, Long Life Screw Terminal Type
Type 550C is the standard for motor drive and other high-ripple, long-
life applications. It boasts more than 25% extra ripple capability per
can size, but less capacitance than Type 520C. Expected operating
life is more than 100,000 hours in typical applications. Type 550C is
rated for 10,000 h life with full ripple current, rated voltage, 85 ºC and
100 lfm airflow while mounted horizontally. Horizontal mounting is
more severe than vertical mounting. The extended cathode foil of the
550C assures heat flow from the capacitor element to the can in all
orientations.
Highlights
Specifications
Temperature Range
Rated Voltage Range
Capacitance Range
Capacitance Tolerance
Leakage Current
Ripple Current Multipliers
- 10,000 hour load life
- Ripple current to 105 amps
- ESRs to 7 mΩ
–40 °C to +105 °C
200 Vdc to 500 Vdc
91 µF to 35,000 µF
–10% +50%
≤3 √CV µA, 4 mA max, 5 minutes
Ambient Temperature
45 ºC
1.66
Frequency
55 ºC
1.52
65 ºC
1.37
75 ºC
1.20
85 ºC
1.00
95 ºC
0.75
105 ºC
0.36
50 60 120 360
Hz Hz Hz Hz
1 3/8” & 2 1/2” Diameters
200 to 350 V
0.77 0.82 1.00 1.21
400 to 500 V
0.73 0.78 1.00 1.33
3” & 3 1/2” Diameters
200 to 350 V
0.80 0.85 1.00 1.17
400 to 500 V
0.73 0.79 1.00 1.31
1
5 10 kHz
kHz kHz & up
1.32 1.37 1.38
1.53 1.66 1.68
1.24 1.28 1.29
1.51 1.63 1.65
Low Temperature Characteristics
Endurance Life Test
Impedance ratio: Z
–20⁰C
∕ Z
+25⁰C
≤ 3 (200–500 Vdc)
10,000 h at full load at 105 °C
∆ Capacitance ±20%
ESR 200% of limit
DCL 100% of limit
500 h at 105 °C
Capacitance 100% of limit
ESR 100% of limit
DCL 100% of limit
10 to 55 Hz, 0.06” and 10 g max, 1.5 h each of two axis
RoHS Compliant
Shelf Life Test
Vibration
CDM Cornell Dubilier • 140 Technology Place • Liberty, SC 29657 • Phone: (864)843-2277 • Fax: (864)843-3800
Type 550C 105 °C High Ripple, Inverter Grade, Aluminum
Ultra-Ripple, Long Life Screw Terminal Type
Part Numbering System
550C
812
T
450
FG
2
D
S
Type
Capacitance
812
=8100 µF
Tolerance
Outline Drawing
D
Terminal
A
= Low Post
M
= ±20%
B
= High Post
U
= –10%+75%
D
= High Current,
T
= 10%+50%
Low Post
E
= High Current,
Standard insulation is 0.008-in PVC sleeve with
High Post
0.01-in polypropylene end disk.
F
= M5 Post
Polyester insulation is not available for 3.5 inch
M = M5 Post, Small
diameter units.
G
= M6 Low Post
H
= M6 High Post
Voltage Case Code
200
= 200 Vdc
Insulation
0=
None
1=
Polyester
2=
PVC
Can Style
Blank=
Standard
Can
S=
Stud
Bottom
P=
Stud
with
Thermal
Pad
+
S
H
+0 -.062
(+0 -1.57)
Stud Dimensions
Case
Diam.
1.375
1.750
2.000
2.500
3.000
3.500
L
Stud
Thread
M8
M8
M12
M12
M12
M12
P± 0.039”
(±1.0 mm)
0.470” (12.0)
0.470” (12.0)
0.630” (16.0)
0.630” (16.0)
0.630” (16.0)
0.630” (16.0)
Optional Stud
P
NOTE: With the stud-mount feature, a thermally-conductive
disk can be inserted in the bottom flush with the outer
insulating sleeve. This reduces the thermal resistance
through the can bottom by 0.3 °C/W. Can Style P.
Terminal Dimensions
For Case
Terminal Style
Low Post
High Post
High Current, Low
High Current, High
M5 Post, Small
M5 Post
M6 Low Post
M6 High Post
Diameters
1
⅜
to 3
1
⅜
to 3
2½ to 3½
2½ to 3½
1
⅜
to 2
2½ & 3
2½ to 3½
2½ to 3½
Code
A
B
D
E
M
F
G
H
Post Diameter
in
0.314
0.314
0.684
0.684
0.314
0.512
0.684
0.684
mm
8.0
8.0
17.4
17.4
8.0
13.0
17.4
17.4
H max
in
0.094
0.281
0.125
0.281
0.281
0.230
0.125
0.281
mm
2.4
7.1
3.2
7.1
7.1
5.8
3.2
7.1
Thread
10–32
10–32
¼–28
¼–28
M5
M5
M6
M6
min Full Thread
in
0.218
0.375
0.344
0.469
0.375
0.344
0.344
0.469
mm
5.5
9.5
8.7
11.9
9.5
8.7
8.7
11.9
Torque
in∙lb
25
25
50
60
25
25
50
60
N∙m
2.82
2.82
5.65
6.78
2.82
2.82
5.65
6.78
NOTE:
Only high post and M5 post terminals are available at 550 Vdc as they meet the required creepage distance.
CDM Cornell Dubilier • 140 Technology Place • Liberty, SC 29657 • Phone: (864)843-2277 • Fax: (864)843-3800
Type 550C 105 °C High Ripple, Inverter Grade, Aluminum
Ultra-Ripple, Long Life Screw Terminal Type
Uninsulated Case Dimensions
Diam. (D)
AK
AA
AH
AB
AJ
AC
AD
AE
AF
EA
EH
EB
EJ
EC
ED
EE
EF
BA
BH
BB
BJ
BC
BD
BE
BF
CH
CB
CJ
CC
CD
CE
CF
DB
DJ
DC
DD
DE
DF
DP
DN
DG
FC
FD
FE
FF
FP
FN
FG
1.375
1.375
1.375
1.375
1.375
1.375
1.375
1.375
1.375
1.750
1.750
1.750
1.750
1.750
1.750
1.750
1.750
2.000
2.000
2.000
2.000
2.000
2.000
2.000
2.000
2.500
2.500
2.500
2.500
2.500
2.500
2.500
3.000
3.000
3.000
3.000
3.000
3.000
3.000
3.000
3.000
3.500
3.500
3.500
3.500
3.500
3.500
3.500
34.93
34.93
34.93
34.93
34.93
34.93
34.93
34.93
34.93
44.45
44.45
44.45
44.45
44.45
44.45
44.45
44.45
50.80
50.80
50.80
50.80
50.80
50.80
50.80
50.80
63.50
63.50
63.50
63.50
63.50
63.50
63.50
76.20
76.20
76.20
76.20
76.20
76.20
76.20
76.20
76.20
88.90
88.90
88.90
88.90
88.90
88.90
88.90
Length (L)
1.625
2.125
2.625
3.125
3.625
4.125
4.625
5.125
5.625
2.125
2.625
3.125
3.625
4.125
4.625
5.125
5.625
2.125
2.625
3.125
3.625
4.125
4.625
5.125
5.625
2.625
3.125
3.625
4.125
4.625
5.125
5.625
3.125
3.625
4.125
4.625
5.125
5.625
5.875
7.625
8.625
4.125
4.625
5.125
5.625
5.875
7.625
8.625
41.28
53.98
66.68
79.38
92.08
104.78
117.48
130.18
142.88
53.98
66.68
79.38
92.08
104.78
117.48
130.18
142.88
53.98
66.68
79.38
92.08
104.78
117.48
130.18
142.88
66.68
79.38
92.08
104.78
117.48
130.18
142.88
79.38
92.08
104.78
117.48
130.18
142.88
149.23
193.68
219.08
104.78
117.48
130.18
142.88
149.23
193.68
219.08
For insulated case, add 0.024”(0.610 mm) to “D”and 0.030”(0.762 mm) to length.
Terminals (S)
0.50
0.50
0.50
0.50
0.50
0.50
0.50
0.50
0.50
0.75
0.75
0.75
0.75
0.75
0.75
0.75
0.75
0.88
0.88
0.88
0.88
0.88
0.88
0.88
0.88
1.13
1.13
1.13
1.13
1.13
1.13
1.13
1.25
1.25
1.25
1.25
1.25
1.25
1.25
1.25
1.25
1.25
1.25
1.25
1.25
1.25
1.25
1.25
12.70
12.70
12.70
12.70
12.70
12.70
12.70
12.70
12.70
19.05
19.05
19.05
19.05
19.05
19.05
19.05
19.05
22.23
22.23
22.23
22.23
22.23
22.23
22.23
22.23
28.58
28.58
28.58
28.58
28.58
28.58
28.58
31.75
31.75
31.75
31.75
31.75
31.75
31.75
31.75
31.75
31.75
31.75
31.75
31.75
31.75
31.75
31.75
Typical Weight
oz
1.9
2.0
2.7
3.3
3.8
4.4
5.1
6.8
8.1
2.7
3.8
5.1
6.8
8.1
9.0
9.5
10.5
5.4
6.1
6.8
8.2
9.5
10.3
10.7
13.0
9.2
10.4
12.7
15.0
17.2
19.3
21.4
16.7
20.0
22.2
25.5
30.0
31.9
32.8
39.5
43.3
30.0
34.4
40.5
43.1
44.3
53.3
58.5
g
Case Code ±.031 Inches ±.78 mm ±.062 Inches ±1.57 mm ±0.015 Inches ±.38 mm
54
57
77
94
108
125
145
193
230
76
108
145
193
230
255
269
298
153
173
193
232
269
292
303
369
261
295
361
425
488
547
607
473
567
629
723
850
904
931
1119
1227
850
976
1148
1221
1257
1512
1658
CDM Cornell Dubilier • 140 Technology Place • Liberty, SC 29657 • Phone: (864)843-2277 • Fax: (864)843-3800
Type 550C 105 °C High Ripple, Inverter Grade, Aluminum
Ultra-Ripple, Long Life Screw Terminal Type
Ratings
ESR Max.
Ripple Max.
@ 25 °C
@ 85 °C
Nominal Size
Catalog
120 Hz
120 Hz
DxL
Part Number
(mΩ)
(A)
(inches)
200 Vdc (250 Vdc Surge)
550C381T200AK2B
262.0
2.3
1 3/8 x 1 5/8
550C691T200AA2B
146.0
3.5
1 3/8 x 2 1/8
550C851T200AH2B
120.0
4.1
1 3/8 x 2 5/8
550C122T200AB2B
88.5
5.1
1 3/8 x 3 1/8
550C122T200EA2B
87.9
5.2
1 3/4 x 2 1/8
550C122T200BA2B
86.0
5.7
2 x 2 1/8
550C142T200EH2B
72.0
6.2
1 3/4 x 2 5/8
550C152T200AJ2B
70.3
6.1
1 3/8 x 3 5/8
550C182T200AC2B
58.5
7.0
1 3/8 x 4 1/8
550C182T200BH2B
60.2
7.4
2 x 2 5/8
550C192T200EB2B
53.1
7.7
1 3/4 x 3 1/8
550C212T200AD2B
50.2
7.9
1 3/8 x 4 5/8
550C242T200AE2B
44.1
8.8
1 3/8 x 5 1/8
550C242T200EJ2B
42.2
9.1
1 3/4 x 3 5/8
550C252T200BB2B
43.3
9.2
2 x 3 1/8
550C272T200AF2B
39.4
9.6
1 3/8 x 5 5/8
550C282T200CH2B
39.1
10.5
2 1/2 x 2 5/8
550C302T200EC2B
35.1
10.4
1 3/4 x 4 1/8
550C322T200BJ2B
34.0
11.0
2 x 3 5/8
550C352T200ED2B
30.2
11.7
1 3/4 x 4 5/8
550C392T200BC2B
28.1
12.6
2 x 4 1/8
550C402T200EE2B
26.6
13.0
1 3/4 x 5 1/8
550C402T200CB2B
28.1
13.2
2 1/2 x 3 1/8
550C452T200EF2B
23.8
14.2
1 3/4 x 5 5/8
550C462T200BD2B
24.0
14.2
2 x 4 5/8
550C512T200CJ2B
22.0
15.6
2 1/2 x 3 5/8
550C532T200BE2B
21.1
15.7
2 x 5 1/8
550C572T200DB2B
23.4
16.1
3 x 3 1/8
550C612T200BF2B
18.9
17.2
2 x 5 5/8
550C622T200CC2B
17.8
18.1
2 1/2 x 4 1/8
550C732T200CD2B
15.2
20.3
2 1/2 x 4 5/8
550C732T200DJ2B
18.3
19.1
3 x 3 5/8
550C852T200CE2B
13.4
22.5
2 1/2 x 5 1/8
550C902T200DC2B
15.2
21.9
3 x 4 1/8
550C962T200CF2B
11.9
24.5
2 1/2 x 5 5/8
Cap.
(µF)
380
690
850
1200
1200
1200
1400
1500
1800
1800
1900
2100
2400
2400
2500
2700
2800
3000
3200
3500
3900
4000
4000
4500
4600
5100
5300
5700
6100
6200
7300
7300
8500
9000
9600
Cap.
(µF)
11000
12000
13000
14000
15000
16000
18000
20000
21000
22000
24000
30000
35000
280
510
620
850
850
910
1000
1100
1300
1300
1400
1500
1800
1800
1800
2000
2100
2200
2400
2600
2900
2900
ESR Max.
Ripple Max.
@ 25 °C
@ 85 °C
Nominal Size
Catalog
120 Hz
120 Hz
DxL
Part Number
(mΩ)
(A)
(inches)
550C113T200DD2B
13.0
24.5
3 x 4 5/8
550C123T200DE2B
11.5
27.0
3 x 5 1/8
550C133T200FC2B
15.5
23.8
3 1/2 x 4 1/8
550C143T200DF2B
10.3
29.4
3 x 5 5/8
550C153T200DP2D
9.8
30.6
3 x 5 7/8
550C163T200FD2B
13.2
26.8
3 1/2 x 4 5/8
550C183T200FE2B
11.7
29.4
3 1/2 x 5 1/8
550C203T200FF2D
10.5
31.9
3 1/2 x 5 5/8
550C213T200DN2D
8.2
36.8
3 x 7 5/8
550C223T200FP2D
10.0
33.2
3 1/2 x 5 7/8
550C243T200DG2D
7.1
40.4
3 x 8 5/8
550C303T200FN2D
8.0
40.6
3 1/2 x 7 5/8
550C353T200FG2D
6.8
44.9
3 1/2x 8 5/8
250 Vdc (300 Vdc Surge)
550C281T250AK2B
339.0
2.1
1 3/8 x 1 5/8
550C511T250AA2B
186.0
3.1
1 3/8 x 2 1/8
550C621T250AH2B
153.0
3.7
1 3/8 x 2 5/8
550C851T250AB2B
113.0
4.6
1 3/8 x 3 1/8
550C851T250EA2B
120.0
4.5
1 3/4 x 2 1/8
550C911T250BA2B
117.0
4.9
2 x 2 1/8
550C102T250EH2B
101.0
5.3
1 3/4 x 2 5/8
550C112T250AJ2B
89.3
5.4
1 3/8 x 3 5/8
550C132T250AC2B
74.1
6.2
1 3/8 x 4 1/8
550C132T250BH2B
82.1
6.3
2 x 2 5/8
550C142T250EB2B
71.3
6.6
1 3/4 x 3 1/8
550C152T250AD2B
63.5
7.0
1 3/8 x 4 5/8
550C182T250AE2B
55.0
7.8
1 3/8 x 5 1/8
550C182T250EJ2B
55.9
7.9
1 3/4 x 3 5/8
550C182T250BB2B
59.0
7.9
2 x 3 1/8
550C202T250AF2B
49.7
8.5
1 3/8 x 5 5/8
550C212T250CH2B
50.5
9.3
2 1/2 x 2 5/8
550C222T250EC2B
45.8
9.1
1 3/4 x 4 1/8
550C242T250BJ2B
45.3
9.5
2 x 3 5/8
550C262T250ED2B
39.3
10.3
1 3/4 x 4 5/8
550C292T250EE2B
34.5
11.4
1 3/4 x 5 1/8
550C292T250BC2B
37.4
10.9
2 x 4 1/8
CDM Cornell Dubilier • 140 Technology Place • Liberty, SC 29657 • Phone: (864)843-2277 • Fax: (864)843-3800
Type 550C 105 °C High Ripple, Inverter Grade, Aluminum
Ultra-Ripple, Long Life Screw Terminal Type
Cap.
(µF)
2900
3300
3400
3700
3900
4200
4500
4600
5400
5400
6200
6600
7100
7800
9000
9700
10000
11000
11000
13000
15000
15000
16000
17000
22000
25000
200
320
480
490
640
640
710
800
910
960
990
1100
1300
1300
1300
1400
1600
1600
1600
1800
2000
ESR Max.
Ripple Max.
@ 25 °C
@ 85 °C
Nominal Size
Catalog
120 Hz
120 Hz
DxL
Part Number
(mΩ)
(A)
(inches)
550C292T250CB2B
36.9
11.5
2 1/2 x 3 1/8
550C332T250EF2B
30.8
12.4
1 3/4 x 5 5/8
550C342T250BD2B
31.9
12.3
2 x 4 5/8
550C372T250CJ2B
28.7
13.7
2 1/2 x 3 5/8
550C392T250BE2B
27.9
13.6
2 x 5 1/8
550C422T250DB2B
28.9
14.5
3 x 3 1/8
550C452T250BF2B
24.9
14.9
2 x 5 5/8
550C462T250CC2B
23.4
15.8
2 1/2 x 4 1/8
550C542T250CD2B
19.9
17.8
2 1/2 x 4 5/8
550C542T250DJ2B
22.3
17.3
3 x 3 5/8
550C622T250CE2B
17.1
19.9
2 1/2 x 5 1/8
550C662T250DC2B
18.5
19.9
3 x 4 1/8
550C712T250CF2B
15.2
21.7
2 1/2 x 5 5/8
550C782T250DD2B
15.8
22.3
3 x 4 5/8
550C902T250DE2B
13.9
24.6
3 x 5 1/8
550C972T250FC2D
16.5
23.1
3 1/2 x 4 1/8
550C103T250DF2B
12.4
26.8
3 x 5 5/8
550C113T250DP2B
11.4
28.2
3 x 5 7/8
550C113T250FD2D
14.3
25.8
3 1/2 x 4 5/8
550C133T250FE2D
12.5
28.4
3 1/2 x 5 1/8
550C153T250DN2D
9.4
34.4
3 x 7 5/8
550C153T250FF2D
11.0
31.2
3 1/2 x 5 5/8
550C163T250FP2D
10.5
32.3
3 1/2 x 5 7/8
550C173T250DG2D
7.9
38.3
3 x 8 5/8
550C223T250FN2D
8.5
39.5
3 1/2 x 7 5/8
550C253T250FG2D
7.2
43.7
3 1/2x 8 5/8
300 Vdc (350 Vdc Surge)
550C201T300AK2B
591.0
1.6
1 3/8 x 1 5/8
550C321T300AA2B
378.0
2.2
1 3/8 x 2 1/8
550C481T300AH2B
254.0
2.9
1 3/8 x 2 5/8
550C491T300EA2B
252.0
3.1
1 3/4 x 2 1/8
550C641T300AB2B
190.0
3.5
1 3/8 x 3 1/8
550C641T300BA2B
188.0
3.9
2 x 2 1/8
550C711T300EH2B
176.0
4.0
1 3/4 x 2 5/8
550C801T300AJ2B
156.0
4.1
1 3/8 x 3 5/8
550C911T300BH2B
131.0
5.0
2 x 2 5/8
550C961T300AC2B
131.0
4.7
1 3/8 x 4 1/8
550C991T300EB2B
126.0
5.0
1 3/4 x 3 1/8
550C112T300AD2B
110.0
5.3
1 3/8 x 4 5/8
550C132T300AE2B
96.9
5.9
1 3/8 x 5 1/8
550C132T300EJ2B
96.2
6.0
1 3/4 x 3 5/8
550C132T300BB2B
94.2
6.3
2 x 3 1/8
550C142T300AF2B
83.4
6.6
1 3/8 x 5 5/8
550C162T300EC2B
77.2
7.0
1 3/4 x 4 1/8
550C162T300BJ2B
73.7
7.5
2 x 3 5/8
550C162T300CH2B
78.2
7.4
2 1/2 x 2 5/8
550C182T300ED2B
67.3
7.8
1 3/4 x 4 5/8
550C202T300BC2B
60.7
8.6
2 x 4 1/8
Cap.
(µF)
2100
2200
2400
2400
2700
2800
3100
3400
3500
4100
4400
4700
5300
5400
6400
7200
7400
8300
8600
8800
9900
11000
12000
12000
14000
16000
18000
160
260
390
400
510
520
570
640
740
770
800
900
1000
1000
1000
1200
1300
1300
1300
1500
ESR Max.
Ripple Max.
@ 25 °C
@ 85 °C
Nominal Size
Catalog
120 Hz
120 Hz
DxL
Part Number
(mΩ)
(A)
(inches)
550C212T300EE2B
58.7
8.7
1 3/4 x 5 1/8
550C222T300CB2B
56.1
9.3
2 1/2 x 3 1/8
550C242T300EF2B
52.2
9.6
1 3/4 x 5 5/8
550C242T300BD2B
51.7
9.7
2 x 4 5/8
550C272T300BE2B
45.1
10.7
2 x 5 1/8
550C282T300CJ2B
43.8
11.1
2 1/2 x 3 5/8
550C312T300BF2B
40.2
11.8
2 x 5 5/8
550C342T300DB2B
37.7
12.7
3 x 3 1/8
550C352T300CC2B
35.9
12.8
2 1/2 x 4 1/8
550C412T300CD2B
30.6
14.4
2 1/2 x 4 5/8
550C442T300DJ2B
29.5
15.1
3 x 3 5/8
550C472T300CE2B
26.7
15.9
2 1/2 x 5 1/8
550C532T300CF2B
23.4
17.5
2 1/2 x 5 5/8
550C542T300DC2B
24.4
17.3
3 x 4 1/8
550C642T300DD2B
20.8
19.4
3 x 4 5/8
550C722T300FC2D
18.8
21.7
3 1/2 x 4 1/8
550C742T300DE2B
18.2
21.5
3 x 5 1/8
550C832T300DF2B
16.2
23.4
3 x 5 5/8
550C862T300FD2D
16.0
24.3
3 1/2 x 4 5/8
550C882T300DP2B
15.4
24.3
3 x 5 7/8
550C992T300FE2D
14.0
26.8
3 1/2 x 5 1/8
550C113T300FF2D
12.1
29.6
3 1/2 x 5 5/8
550C123T300FP2D
11.5
30.8
3 1/2 x 5 7/8
550C123T300DN2D
12.4
30.0
3 x 7 5/8
550C143T300DG2D
10.5
33.3
3 x 8 5/8
550C163T300FN2D
9.2
38.1
3 1/2 x 7 5/8
550C183T300FG2D
7.7
42.3
3 1/2x 8 5/8
350 Vdc (400 Vdc Surge)
550C161T350AK2B
662.0
1.5
1 3/8 x 1 5/8
550C261T350AA2B
414.0
2.1
1 3/8 x 2 1/8
550C391T350AH2B
284.0
2.7
1 3/8 x 2 5/8
550C401T350EA2B
281.0
2.9
1 3/4 x 2 1/8
550C511T350BA2B
209.0
3.7
2 x 2 1/8
550C521T350AB2B
213.0
3.3
1 3/8 x 3 1/8
550C571T350EH2B
196.0
3.8
1 3/4 x 2 5/8
550C641T350AJ2B
175.0
3.9
1 3/8 x 3 5/8
550C741T350BH2B
146.0
4.7
2 x 2 5/8
550C771T350AC2B
146.0
4.4
1 3/8 x 4 1/8
550C801T350EB2B
141.0
4.7
1 3/4 x 3 1/8
550C901T350AD2B
123.0
5.0
1 3/8 x 4 5/8
550C102T350AE2B
111.0
5.5
1 3/8 x 5 1/8
550C102T350EJ2B
110.0
5.6
1 3/4 x 3 5/8
550C102T350BB2B
105.0
5.9
2 x 3 1/8
550C122T350AF2B
93.1
6.2
1 3/8 x 5 5/8
550C132T350EC2B
86.0
6.7
1 3/4 x 4 1/8
550C132T350BJ2B
81.7
7.1
2 x 3 5/8
550C132T350CH2B
86.7
7.1
2 1/2 x 2 5/8
550C152T350ED2B
74.9
7.4
1 3/4 x 4 5/8
CDM Cornell Dubilier • 140 Technology Place • Liberty, SC 29657 • Phone: (864)843-2277 • Fax: (864)843-3800
无线连接
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
