AFC687M16GB-F [CDE]
Aluminum Electrolytic Capacitor, Polarized, Aluminum (wet), 16V, 20% +Tol, 20% -Tol, 680uF, Surface Mount, CHIP;
| 型号： | AFC687M16GB-F |
| 厂家： | 
CORNELL DUBILIER ELECTRONICS |
| 描述： | Aluminum Electrolytic Capacitor, Polarized, Aluminum (wet), 16V, 20% +Tol, 20% -Tol, 680uF, Surface Mount, CHIP 电容器 |
| 文件： | 总11页 (文件大小：785K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Type AFC, -55°C to 105°C
SMT Aluminum Electrolytic Capacitors - Low Impedance, 105°C
Low Impedance and Long-Life for Filtering, Bypassing, Power Supply Decoupling
Type AFC Capacitors are the choice for high-frequency
filtering. At 100 kHz, most ratings can handle more
than twice the ripple current of type AHA. With solid
performance at temperatures down to -55°C, Type AFC
has more than 90% capacitance retention at -20°C and 1
kHz. With low impedance to beyond 100 kHz, it is ideal
for higher power DC/DC converters. The vertical
cylindrical cases make for easy automatic mounting and
reflow soldering, and offer big savings and higher
capacitance compared to tantalum capacitors.
Highlights
♦
♦
♦
+105°C, Up to 1000 Hour Load Life
Capacitance Range: 1 µF to 1500 µF
Voltage Range: 6.3 Vdc to 50 Vdc
Specifications
Operating Temperature:
-55°C to +105°C
6.3, 10, 16, 25 & 50 Vdc
1.0 µF to 1500 µF
20% @ 120 Hz and +20°C
0.01 CV or 3 µA @ +20°C, after two minutes (whichever is greater)
Frequency
Rated Voltage:
Capacitance:
Capacitance Tolerance:
Leakage Current:
Ripple Current Multiplier:
50/60 Hz 120 Hz
0.7 0.75
1 kHz
0.9
10 kHz
0.95
100 kHz
1.0
Dissipation Factor:
See Ratings Table
Shelf Life: 1000 h @ +105°C
Load Life:
1000 h @ +105°C
∆ Capacitance 20%
DF: ≤200% of limit
DCL: ≤100% of limit
∆ Capacitance 20%
DF: ≤200% of limit
DCL: ≤100% of limit
AFC Series Marking
Outline Drawing
Capacitance
K
0.3 mm Max.
A
(µF)
Series
220
I
FC
D
P
H
Voltage
I
j = 6.3 Vdc E = 25 Vdc
A = 10 Vdc V = 35 Vdc
C = 16 Vdc H = 50 Vdc
W
Line Ident.
L
Case Dimensions
Case
Code
B
C
D
E
D
0.5
4.0
5.0
6.3
8.0
8.0
L
A
0.2
H (max)
5.5
6.5
7.8
9.5
I (ref)
W
P (ref)
K
5.4 +.1,-.2
5.4 +.1,-.2
5.4 +.1,-.2
6.2 .3
10.2 .3
10.2 .3
4.3
5.3
6.6
8.3
8.3
1.8
2.2
2.4
3.4
3.4
3.5
0.65 0.1
0.65 0.1
0.65 0.1
0.65 0.1
0.90 0.2
0.90 0.2
1.0
1.5
1.8
2.2
3.2
4.6
0.35 + 0.15/-0.20
0.35 + 0.15/-0.20
0.35 + 0.15/-0.20
0.35 + 0.15/-0.20
0.70 0.20
F
G
10
12
10.0
10.3
0.70 0.20
1605 East Rodney French Blvd.
New Bedford, MA 02744
(508) 996-8564, Fax (508) 996-3830
http://www.cornell-dubilier.com
E-mail: cdenb@cornell-dubilier.com
CORNELL
DUBILIER
Your Source For Capacitor Solutions
1.012
Type AFC, -55°C to 105°C
SMT Aluminum Electrolytic Capacitors - Low Impedance, 105°C
Ratings Table
Max.
Max.
Max.
Max.
DCL
A/2
(µ
min)
Dissipation ESR @ Impedance Ripple Current
Cap
F
µ
Catalog
Number
Factor @
120 Hz
20 °C
120 Hz @ 100 kHz
20 °C 20 °C
Ω
@ 105°C
100 kHz
(mA)
Case Size (mm) Quantity
Code
D x L
per Reel
(
)
( )
Ω
6.3 Vdc ( 8 Vdc Surge)
22
47
AFC226M06B12T
AFC476M06C12T
AFC107M06D16T
AFC227M06E16T
AFC337M06F24T
AFC108M06G24T
AFC158M06G24T
3.0
3.0
6.3
13.9
20.8
63.0
94.5
0.26
0.26
0.26
0.26
0.26
0.26
0.26
19.6
9.2
4.3
2.0
1.3
3.0
1.8
1.0
0.4
0.3
60
95
B
C
D
E
F
4x5.4
5x5.4
6.3x5.4
8x6.2
8x10.2
10x10.2
10x10.2
2000
1000
1000
1000
500
100
220
330
1000
1500
140
230
450
670
670
0.43
0.29
0.15
0.15
G
G
500
500
10 Vdc (13 Vdc Surge)
33
100
150
220
470
1000
AFC336M10C12T
AFC107M10E16T
AFC157M10E16T
AFC227M10F24T
AFC477M10G24T
AFC108M10G24T
3.3
10.0
15.0
22.0
47.0
100.0
0.19
0.19
0.19
0.19
0.19
0.22
9.6
3.2
2.1
1.4
0.67
0.36
1.8
0.4
0.4
0.3
0.15
0.15
95
C
E
E
F
G
G
5x5.4
8x6.2
8x6.2
8x10.2
10x10.2
10x10.2
1000
1000
1000
500
500
500
230
230
450
670
670
16 Vdc ( 20 Vdc Surge)
10
22
47
AFC106M16B12T
AFC226M16C12T
AFC476M16D16T
AFC686M16E16T
AFC107M16E16T
AFC227M16G24T
AFC337M16G24T
AFC477M16G24T
AFC687M16G24T
3.0
3.5
7.5
10.9
16.0
35.2
52.8
75.2
108.8
0.16
0.16
0.16
0.16
0.16
0.16
0.16
0.16
0.16
26.5
12.1
5.7
3.9
2.7
1.2
0.8
0.6
0.4
3.0
1.8
1.0
0.4
0.4
0.15
0.15
0.15
0.15
60
95
B
C
D
E
E
G
G
G
G
4x5.4
5x5.4
6.3x5.4
8x6.2
2000
1000
1000
1000
1000
500
500
500
500
140
230
230
670
670
670
670
68
100
220
330
470
680
8x6.2
10x10.2
10x10.2
10x10.2
10x10.2
25 Vdc ( 31 Vdc Surge)
6.8
22
33
47
68
100
220
330
470
AFC685M25B12T
AFC226M25D16T
AFC336M25D16T
AFC476M25E16T
AFC686M25F24T
AFC107M25F24T
AFC227M25G24T
AFC337M25G24T
AFC477M25G24T
3.0
5.5
8.3
11.8
17.0
25.0
55.0
82.5
117.5
0.14
0.14
0.14
0.14
0.14
0.14
0.14
0.14
0.14
34.1
10.6
7.0
4.9
3.4
2.3
1.1
0.7
0.5
3.0
1.0
1.0
0.4
0.3
60
B
D
D
E
F
4x5.4
6.3x5.4
6.3x5.4
8x6.2
8x10.2
8x10.2
10x10.2
10x10.2
10x10.2
2000
1000
1000
1000
500
500
500
500
500
140
140
230
450
450
670
670
670
0.3
F
0.15
0.15
0.15
G
G
G
35 Vdc (44 Vdc Surge)
1
AFC105M35B12T
AFC225M35B12T
AFC335M35B12T
AFC475M35B12T
AFC685M35C12T
AFC106M35C12T
AFC226M35D16T
AFC336M35E16T
AFC476M35E16T
AFC107M35G24T
AFC227M35G24T
AFC337M35G24T
3.0
3.0
3.0
3.0
3.0
0.12
0.12
0.12
0.12
0.12
0.12
0.12
0.12
0.12
0.12
0.12
0.12
199
90.4
60.3
42.4
29.3
19.9
9.1
6.0
4.2
2.0
0.9
3.0
3.0
3.0
3.0
1.8
1.8
1.0
0.4
0.4
0.2
0.15
0.15
60
60
60
60
95
B
B
B
B
C
C
D
E
E
G
G
G
4x5.4
4x5.4
4x5.4
4x5.4
5x5.4
5x5.4
6.3x5.4
8x6.2
2000
2000
2000
2000
1000
1000
1000
1000
1000
500
2.2
3.3
4.7
6.8
10
22
33
47
3.5
7.7
95
140
230
230
670
670
670
11.6
16.5
35.0
77.0
115.5
8x6.2
100
220
330
10x10.2
10x10.2
10x10.2
500
500
0.6
50 Vdc ( 63 vdc Surge)
1
AFC105M50B12T
AFC225M50B12T
AFC335M50B12T
AFC475M50C12T
AFC106M50D16T
AFC226M50E16T
AFC336M50F24T
AFC476M50G24T
AFC107M50G24T
AFC227M50G24T
3.0
3.0
3.0
3.0
5.0
11.0
16.5
23.5
50.0
110.0
0.12
0.12
0.12
0.12
0.12
0.12
0.12
0.12
0.12
0.12
199
90.5
60.3
42.4
19.9
9.1
6.0
4.2
2.0
0.9
5.0
5.0
5.0
3.0
2.0
0.7
0.6
0.3
0.3
0.3
30
30
30
50
70
120
300
500
500
500
B
B
B
C
D
E
F
G
G
G
4x5.4
4x5.4
4x5.4
5x5.4
6.3x5.4
8x6.2
8x10.2
10x10.2
10x10.2
10x10.2
2000
2000
2000
1000
1000
1000
500
500
500
500
2.2
3.3
4.7
10
22
33
47
100
220
Part Numbering System
AFC
106
M
16
Voltage
B
12T
Type
Capacitance Capacitance
Case
Code
Packaging
Information
12 = Carrier Tape
Width (mm)
T = Tape & Reel
B = Bulk
Tolerance
10 = 10 Vdc 35 = 35 Vdc
16 = 16 Vdc 50 = 50 Vdc
25 = 25 Vdc
105 = 1.0 µF
106 = 10 µF
107 = 100 µF
108 = 1000 µF
M = 20%
1605 East Rodney French Blvd.
CORNELL
DUBILIER
New Bedford, MA 02744
(508) 996-8564, Fax (508) 996-3830
http://www.cornell-dubilier.com
E-mail: cdenb@cornell-dubilier.com
Your Source For Capacitor Solutions
1.013
Type AFC, -55°C to 105°C
SMT Aluminum Electrolytic Capacitors - Low Impedance, 105°C
Typical Performance Curves
Capacitance vs. Temperature & Frequency
Capacitance vs. Temperature & Frequency
1500 µF @ 6.3 Vdc (10 X 10.2 mm)
330 µF @ 6.3 Vdc (8 X 10.2 mm)
1 .2
1
1 .4
1 .2
1
1 0 5 ° C
8 5 ° C
6 5 ° C
4 5 ° C
1 0 5 °C
8 5 ° C
6 5 ° C
0 .8
0 .6
0 .4
0 .2
0
2 5 ° C
0 .8
0 .6
0 .4
0 .2
0
4 5 ° C
2 5 ° C
0 °C
– 2 0 ° C
0 °C
– 2 0 °C
– 4 0 ° C
– 5 5 ° C
– 4 0 °C
– 5 5 °C
1 0
1 0 0
1 ,0 0 0
1 0 ,0 0 0
1 0 0 ,0 0 0
1 ,0 0 0 ,0 0 0
1 0
1 0 0
1 0 0 0
1 0 0 0 0
1 0 0 0 0 0
1 0 0 0 0 0 0
Frequency (Hz)
Frequency (Hz)
ESR vs. Temperature and Frequency
ESR vs. Temperature and Frequency
330 µF @ 6.3 Vdc (8 X 10.2 mm)
1500 µF @ 6.3 Vdc (10 X 10.2 mm)
100
100
–55°C
–40°C
–55°C
10
10
–40°C
–20°C
–20°C
0°C
0°C
1
1
25°C
45°C
25°C
45°C
65°C
65°C
105°C
85°C
85°C
105°C
0.1
0.1
10
100
1,000
10,000
100,000
1,000,000
10
100
1,000
10,000
100,000
1,000,000
Frequency (Hz)
Frequency (Hz)
Impedance vs. Temperature and Frequency
1500 µF @ 6.3 Vdc (10 X 10.2 mm)
mm)
Impedance vs. Temperature and Frequency
330 µF @ 6.3 Vdc (8 X 10.2 mm)
10
100
10
mm)
1
–55°C
–40°C
–55°
–40°C
1
–20°C
0°C
–20°C
0°C
0.1
25°C
0.1
0.01
25°C
45°C
45°C
65°C
105°C
85°C
65°C
85°C
105°C
0.01
10
100
1,000
10,000
100,000
1,000,000
10
100
1,000
10,000
100,000
1,000,000
Frequency (Hz)
Frequency (Hz)
1605 East Rodney French Blvd.
New Bedford, MA 02744
(508) 996-8564, Fax (508) 996-3830
http://www.cornell-dubilier.com
E-mail: cdenb@cornell-dubilier.com
CORNELL
DUBILIER
Your Source For Capacitor Solutions
1.014
Type AFC
SMT Aluminum Electrolytic Capacitors - Low Impedance, 105°C
Typical Performance Curves
Capacitance vs. Temperature & Frequency
Capacitance Change with Temperature
(Typical Performance AFC Series @ 120 Hz)
220 µF @ 50 Vdc (10 X 10.2 mm)
1.2
1
20
10
0
105°C
85°C
65°C
0.8
0.6
0.4
0.2
0
45°C
25°C
0°C
–20°C
100 µF @ 6.3 Vdc (6.3 X 5.4 mm)
47 µF @ 16 Vdc (6.3 X 5.4 mm)
10 µF @ 50 Vdc (6.3 X 5.4 mm)
-10
-20
–40°C
–55°C
-60
-40
-20
0
20
40
60
80
100
120
10
100
1,000
10,000
100,000
1,000,000
Frequency (Hz)
Temperature (°C)
Dissipation Factor vs. Temperature
(Typical Performance AFC Series @ 120 Hz)
ESR vs. Temperature and Frequency
220 µF @ 50 Vdc (10 X 10.2 mm)
100
10
1
0.6
0.5
0.4
0.3
0.2
0.1
0
100 µF @ 6.3 Vdc (6.3 X 5.4 mm)
47 µF @ 16 Vdc (6.3 X 5.4 mm)
10 µF @ 50 Vdc (6.3 X 5.4 mm)
–55°C
–40°C
–20°C
0°C
25°C
45°C
65°C
10,000
85°C 105°C
0.1
10
100
1,000
100,000
1,000,000
-60
-40
-20
0
20
40
60
80
100
120
Frequency (Hz)
Temperature (°C)
Impedance vs. Temperature and Frequency
Capacitance Change vs Time
220 µF @ 50 Vdc (10 X 10.2 mm)
(Typical Performance AFC Series)
100
10
1 0
5
10 µF @ 16 Vdc (4 x 5.4 mm)
47 µF @ 16 Vdc ( 6.3 x 5.4 mm)
330 µF @ 16 Vdc (10 x 10.2 mm)
–55°
0
–40°C
1
-5
–20°C
0°C
-1 0
-1 5
-2 0
0.1
0.01
45°C
65°C
25°C
85°C
105°C
10
100
1,000
10,000
100,000
1,000,000
0
5 0 0
1 ,0 0 0
1 ,5 0 0
2 ,0 0 0
Frequency (Hz)
Time (Hours)
1605 East Rodney French Blvd.
New Bedford, MA 02744
CORNELL
DUBILIER
(508) 996-8564, Fax (508) 996-3830
http://www.cornell-dubilier.com
Your Source For Capacitor Solutions
1.015
E-mail: cdenb@cornell-dubilier.com
AVS, AHA, AFC, AFK, AHD, AEB Tape and Reel Specifications
Tape Specifications
Component Orientation
Polarity Stripe (-) Cathode
t ± 0.2
4 ± 0.1
1.5 dia
1.75 ± 0.1
F ± 0.1
0.4
W ± 0.3
B ± 0.2
A ± 0.2
P1
(mm)
t
Case Code
W
A
B
P1
8.0
8.0
12.0
12.0
12.0
12.0
16.0
16.0
F
5.5
5.5
5.5
7.5
7.5
7.5
11.5
11.5
A
B
C
D
X
E
F
12.0
12.0
12.0
16.0
16.0
16.0
24.0
24.0
3.4
4.7
6.0
7.0
7.0
8.7
8.7
10.7
3.5
4.6
6.0
7.0
7.0
8.7
8.7
10.7
5.8
5.8
5.8
5.8
8.4
6.8
11.0
11.0
G
0.2+0.05
4.0±0.1
2.0±0.1
1.5±0.1
D±0.2
0.5
0.75+0.1
1.75±0.1
F±0.1
A±0.5
C±0.5
W±0.3
S±0.1
P±0.1
B±0.5
(mm)
S
Case Code
W
A
B
C
D
F
P
J
32.0
32.0
32.0
32.0
44.0
44.0
44.0
44
10.7
10.7
14.0
14.0
17.5
19.5
19.5
17.5
10.7
10.7
14.0
14.0
17.5
19.5
19.5
17.5
14.5
14.5
14.2
14.2
14.2
14.2
20.2
20.2
20.2
20.2
20.0
20.0
24.0
24.0
28.0
32.0
32.0
28
28.4
28.4
28.4
28.4
40.4
40.4
40.4
40.4
K
H
L
P
R
S
U
14.5
18.0
18.0
23.0
26.0
26.0
23
18.5
14.5
17.5
17.5
17.5
22.5
22.5
1605 East Rodney French Blvd.
New Bedford, MA 02744
(508) 996-8564, Fax(508) 996-3830
http://www.cornell-dubilier.com
E-mail: cdenb@cornell-dubilier.com
AVS, AHA, AFC, AFK, AHD, AEB Tape and Reel Specifications
Reel Specifications
E
C
B
D
1.0 mm
(.039 in.)
R:
t
A
W
(mm)
Case Code
A, B size
C, D, E, X size 380±2
F, G size 380±2
J, K, H, L size 330±2
P, R, S, U size 330±2
A
B
C
D
E
W
t
380±2
50 min 13.0±0.5 21.0±0.8 2.0±0.5
50 min 13.0±0.5 21.0±0.8 2.0±0.5
50 min 13.0±0.5 21.0±0.8 2.0±0.5
50 min 13.0±0.5 21.0±0.8 2.0±0.5
50 min 13.0±0.5 21.0±0.8 2.0±0.5
14±1
18±1
26±1
34±1
46±1
3.0
3.0
3.0
3.0
3.0
Land Pattern:
C
A
B
B
(mm)
C
Case Code
A
B
A
B
C
D
E
F
G
J, K
H
L
0.6
1.0
1.5
2.2
2.2
3.2
4.6
4
4.0
4.0
6.0
6.0
6.0
2.2
2.5
2.8
3.0
4.5
4.0
4.3
4.5
5.7
5.7
6.5
6.5
7.5
1.5
1.6
1.6
1.6
1.6
2.0
2.0
2.0
2.0
2.0
2.5
2.5
2.5
P
R, U
S
1605 East Rodney French Blvd.
New Bedford, MA 02744
(508) 996-8564, Fax(508) 996-3830
http://www.cornell-dubilier.com
E-mail: cdenb@cornell-dubilier.com
AVS, AHA, AFC, AFK, AHD, AEB Reflow Solder & Case Dimensions
Reflow Soldering Temperature Profile:
Peak
5 seconds
maximum
Temp.
(see chart
right)
Case
Code
Peak
Temp (°C)
Max. Time
@ 200°C
(Sec.)
40
200°C
160°C
A, B, C, D, X
E, F, G, H
J, K, L, P
R, S, U
240
230
Maximum
Time @ 200°C
(see chart right)
30
120 seconds
Preheat
Time
Outline Drawing
K
0.3 mm Max.
A
I
I
D
P
H
W
L
Case Dimensions
(mm)
Case
Code
A
B
C
D
X
E
F
G
H
J
K
L
P
R
S
D ± 0.5
3.0
4.0
5.0
6.3
6.3
8.0
8.0
L
A ± 0.2
3.3
4.3
5.3
6.6
6.6
8.3
8.3
10.3
13.5
10.3
10.3
13.5
17.0
19.0
19.0
17.0
H (max)
4.5
5.5
6.5
7.8
7.8
9.5
10
12
15
12
12
15.0
19.0
21.0
21.0
19.0
I (ref)
1.5
1.8
2.2
2.4
2.6
3.4
3.4
3.5
4.7
3.5
3.5
4.7
5.5
6.5
6.5
6.7
W
P (ref)
K
5.4 +.1,-.2
5.4 +.1,-.2
5.4 +.1,-.2
5.4 +.1,-.2
7.9 ±.3
0.55 ± 0.1 0.6 0.35 + 0.15/-0.20
0.65 ± 0.1 1.0 0.35 + 0.15/-0.20
0.65 ± 0.1 1.5 0.35 + 0.15/-0.20
0.65 ± 0.1 1.8 0.35 + 0.15/-0.20
0.65 ± 0.1 1.8 0.35 + 0.15/-0.20
0.65 ± 0.1 2.2 0.35 + 0.15/-0.20
6.2 ±.3
10.2 ±.3
10.2 ±.3
13.5 ± .5
13.5
0.90 ± 0.2 3.2
0.90 ± 0.2 4.6
0.70 ± 0.20
0.70 ± 0.20
0.70 ± 0.30
0.70 ± 0.20
0.70 ± 0.20
0.70 ± 0.30
0.70 ± 0.30
0.70 ± 0.30
0.70 ± 0.30
0.70 ± 0.30
10.0
12.5
10
0.9 ±0.3
0.9 ±0.2
0.9 ±0.2
0.9±0.3
1.2±0.3
1.2±0.3
1.2±0.3
1.2±0.3
4.4
4.6
4.6
4.4
6.7
6.7
6.7
6.7
10
17.5
12.5
16.0
18.0
18.0
16.0
16.5 ± .5
16.5 ± .5
16.5 ± .5
21.5 ± .5
21.5
U
*5.8 +0.1,-0.2 for AFK and AHD Series
1605 East Rodney French Blvd.
New Bedford, MA 02744
(508) 996-8564, Fax(508) 996-3830
http://www.cornell-dubilier.com
E-mail: cdenb@cornell-dubilier.com
V-Chip Cleaning and Coating Guide
Cleaning
Below is a table discribing the usable solvents for cleaning a PC board containing V-Chips.
Table 1
Recommended
use level
Symtoms
of Damage
Solvent type
Name
Manufacturer
Water Base
Water
Alkaline
Distilled Water
Aqua Cleaner 210SEP
Pine Alpha ST-100S
Clean-thru 750H
Clean-thru 750L
Clean-thru 710M
Sun-elec B-12
DK be-clean CW-5790
1
2
2
2
2
2
2
2
None
Sanei
Aralaw a Kasei Kogyo
None, though
marking ink
may fade
Surface active
agent
Kao Corporation
Sanyo Kasei
Dai-Ichi Kogyo Seiyaku
Solvent Base
Cold-cleaner P3-375
Techno-cleaner 219
Henkel Hakusui
3
3
swellling on
sealing rubber
rinse and dry
well after
Petroleum
based
Seiwa Sangyo
hydrocarbon
Alcohol base
Axarel 32
Mitsui DFC
3
cleaning
Isopropyl Alcohol
Techno-care FRW-17
Techno-care FRW-17
(Techno-care FRV-100)
1
3
3
3
None
None if used in
combination
Silicon base
Toshiba Corporation
Contains
CFC's subject
to
environmental
regulations
swelled seal
Asashi-clean AK-225AES
Ashahi Glass
Dalkin Kogyo
3
Halogenated
hydrocarbon
HCFC141B-MS
3
3
Telpen base
Telpen-cleaner EC-7R Nippon Alpha Metals
Use level
Number
Recommendation
1
2
3
Cleaning is possible
Cleaning is possible (markings may fade)
Cleaning is possible (Use caution. 1 and 2 are better choices)
V-Chips may be immersed for 5 minutes, safely, in Level 1&2 solvents. Use Level 3
solvents with caution.
Do not use chlorine-based halogenated cleaning solvents, adhesives or coating agents.
When halogenated chlorine-based solvents are used in the cleaning process, free clorine
is liberated from the solvent. This chlorine causes corrosion and deterioration of the
aluminum inside the capacitor
Dangers of “Free-Chlorine”:
After the solvent dries, the chlorine remains on the capacitor seal, the chlorine slowly
permeates into the capacitor element causing corrosion and damage that happens slowly.
It may take some time before a failure is apparent. A representation of the chemical
reaction is on the following page.
1605 East Rodney French Blvd.
New Bedford, MA 02744
(508) 996-8564, Fax(508) 996-3830
http://www.cornell-dubilier.com
E-mail: cdenb@cornell-dubilier.com
V-Chip Cleaning and Coating Guide
Free-chlorine Diagram:
Cl
C
H
C
H
C
Cl
C
Electrolysis
reaction
Cl
H
H
Cl
(2H)
+
Cl
H
H
Cl
Chlorosen
H
C
H
Cl
H
Cl
Cl
HCl
H
C
H
Cl
HCl
C
C
+
=
+
H
Dichloroethane
Dicloroethylene
Fig. 1 Decomposed reaction of cleaning solvents (Free-chlorine)
Reaction of Free-chlorine and Aluminum
Combined free chlorine and hydrogen become hydrochloric acid, but it has high
dissociation and most of it becomes chlorine ions. These chlorine ions react with
the aluminum. The order of the reactions is represented below.
1.) Hydration of oxide film
AlO
2.) Reaction of hydrated oxide film and chlorine (Dissolution of film)
Al(OH) + 3HCl > AlCl + 3H
3
+ 3H
2
O
> 2Al(OH)
3
3
3
2
O
3.) Reaction of aluminum and hydrochloric acid (Dissolution of aluminum)
Al + 3HCl > AlCl + 3/2H
3
2
4.) Precipitation of aluminum hydroxide
AlCl + 3H > Al(OH) + 3HCl
3
2
O
3
The entire reaction can be summerized as the following:
Al + Al + 3HCl + 3H > 2Al(OH) + AlCl
2
O
3
3
2
O
3
3
+ AlCl + H3/2
3
Therefore the compounds produced by the reactions are aluminum hydroxide and hydrochloric
acid from reaction #4; the hydrochloric acid is not consumed and acts as a catalyst.
1605 East Rodney French Blvd.
New Bedford, MA 02744
(508) 996-8564, Fax(508) 996-3830
http://www.cornell-dubilier.com
E-mail: cdenb@cornell-dubilier.com
V-Chip Cleaning and Coating Guide
Solvents that should not be used
Table 2
Composition
1.1.1-Trichloroethane
Trichloroethylene
Boiling Point (°C) Common Name
74.1
87.2
Chlorosen
Trichlene
Tetrachloroethylene
121.1
Perchloroethylene
Additional Cleaning Notes:
1.) Solvents containing CFC’s destroy the ozone layer and should be avoided to protect the global environment.
2.) To avoid solvent residue between the capacitor’s seal and the PC board, make sure the assembly is dried
thoroughly immediately after cleaning.
Coating
Below is a list of coatings that are safe for use with V-Chips
Table 3
Manufacturer
Material
Acrylic
Urethane
Acrylic
Urethane
Silicon
Urethane
Coating Material Name
Taffi-1141, Taffi-1147
Taffi-1154
Humi Seal 1B66
Humi Seal 1A27
Perugan Z, Perugan C
Quinate System 160B
Hitachi Chemical
Boxy Brown
Dow Corning
Nihon Zeon
Influence of Coating Materials
Coating materials are typically used for insulation, waterproofing, dustproofing and
rustproofing. When coating materials are selected there are factors to prevent internal
corrosion (chlorine reaction with aluminum) while the capacitor is functioning. The
following steps will help prevent this damage to the capacitor.
A.) Corrosion Reaction
Avoid halogen solvents which permeate the capacitor’s seal, releasing chlorine which
reacts with the aluminum inside the capacitor.
B.) Selecting a Coating Material
It is necessary to select a coating material that contains no chlorine.
The coating consists of the main ingredient which could be urethane resin, acrylic resin
or other polymer, a solvent and other additives such as flameproofing agents.
1605 East Rodney French Blvd.
New Bedford, MA 02744
(508) 996-8564, Fax(508) 996-3830
http://www.cornell-dubilier.com
E-mail: cdenb@cornell-dubilier.com
V-Chip Cleaning and Coating Guide
The coating’s solvent dries and diffuses into the rubber seal of the capacitor, therefore
halogenated hydrocarbon solvents containing chloride should not be used.
Similar to the solvent, additives can permeate into the capacitor through the rubber
seal. Ingredients in many additives might not be listed, therefore use caution when
choosing an additive.
C.) Other Concerns
Solvents and additives are subject to change without notice. Make sure ingredients
are identified.
Avoid coating a substrate after cleaning it with a halogenated hydrocarbon. The
coating will prevent the remaining solvent from diffusing which may cause corrosion.
1605 East Rodney French Blvd.
New Bedford, MA 02744
(508) 996-8564, Fax(508) 996-3830
http://www.cornell-dubilier.com
E-mail: cdenb@cornell-dubilier.com
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