AFC335M35B12B - Cornell Dubilier Electronics, Inc.

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

1.012

CORNELL

DUBILIER

Your Source For Capacitor Solutions

Chip and SMT

Capacitors

Low Impedance and Long-Life for Filtering, Bypassing, Power Supply Decoupling

Highlights

♦ +105°C, Up to 1000 Hour Load Life

♦ Capacitance Range: 1 µ F to 1500 µ F

♦ Voltage Range: 6.3 Vdc to 50 Vdc

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.

Type AFC, -55°C to 105°C

SMT Aluminum Electrolytic Capacitors - Low Impedance, 105°C

-55°C to +105°C

6.3, 10, 16, 25 & 50 Vdc

1.0

F to 1500

±20% @ 120 Hz and +20°C

0.01 CV or 3 µ A @ +20°C, after two minutes (whichever is greater)

Frequency

See Ratings Table

Specifications

1000 h @ +105°C

∆ Capacitance ± 20%

DF: ≤ 200% of limit

DCL: ≤ 100% of limit

1000 h @ +105°C

∆ Capacitance ± 20%

DF: ≤ 200% of limit

DCL: ≤ 100% of limit

Load Life: Shelf Life:

Operating Temperature:

Rated Voltage:

Capacitance:

Capacitance Tolerance:

Leakage Current:

Ripple Current Multiplier:

Dissipation Factor:

50/60 Hz 120 Hz 1 kHz 10 kHz 100 kHz

0.7 0.75 0.9 0.95 1.0

Case Dimensions

Case

Code D ± 0.5 L A ± 0.2 H (max) I (ref) W P (ref) K

B 4.0 5.4 +.1,-.2 4.3 5.5 1.8 0.65 ± 0.1 1.0 0.35 + 0.15/-0.20

C 5.0 5.4 +.1,-.2 5.3 6.5 2.2 0.65 ± 0.1 1.5 0.35 + 0.15/-0.20

D 6.3 5.4 +.1,-.2 6.6 7.8 2.4 0.65 ± 0.1 1.8 0.35 + 0.15/-0.20

E8.06.2 ±.3 8.3 9.5 3.4 0.65 ± 0.1 2.2 0.35 + 0.15/-0.20

F8.010.2 ±.3 8.3 10 3.4 0.90 ± 0.2 3.2 0.70 ± 0.20

G10.010.2 ±.3 10.3 12 3.5 0.90 ± 0.2 4.6 0.70 ± 0.20

Outline Drawing

0.3 mm Max. A

AFC Series Marking

220

Capacitance

(

Voltage

Series

Line Ident.

j = 6.3 Vdc E = 25 Vdc

A = 10 Vdc V = 35 Vdc

C = 16 Vdc H = 50 Vdc

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 1.013

Chip and SMT

Capacitors

CORNELL

DUBILIER

Your Source For Capacitor Solutions

1 AFC105M35B12T 3.0 0.12 199 3.0 60 B 4x5.4 2000

2.2 AFC225M35B12T 3.0 0.12 90.4 3.0 60 B 4x5.4 2000

3.3 AFC335M35B12T 3.0 0.12 60.3 3.0 60 B 4x5.4 2000

4.7 AFC475M35B12T 3.0 0.12 42.4 3.0 60 B 4x5.4 2000

6.8 AFC685M35C12T 3.0 0.12 29.3 1.8 95 C 5x5.4 1000

10 AFC106M35C12T 3.5 0.12 19.9 1.8 95 C 5x5.4 1000

22 AFC226M35D16T 7.7 0.12 9.1 1.0 140 D 6.3x5.4 1000

33 AFC336M35E16T 11.6 0.12 6.0 0.4 230 E 8x6.2 1000

47 AFC476M35E16T 16.5 0.12 4.2 0.4 230 E 8x6.2 1000

100 AFC107M35G24T 35.0 0.12 2.0 0.2 670 G 10x10.2 500

220 AFC227M35G24T 77.0 0.12 0.9 0.15 670 G 10x10.2 500

330 AFC337M35G24T 115.5 0.12 0.6 0.15 670 G 10x10.2 500

1 AFC105M50B12T 3.0 0.12 199 5.0 30 B 4x5.4 2000

2.2 AFC225M50B12T 3.0 0.12 90.5 5.0 30 B 4x5.4 2000

3.3 AFC335M50B12T 3.0 0.12 60.3 5.0 30 B 4x5.4 2000

4.7 AFC475M50C12T 3.0 0.12 42.4 3.0 50 C 5x5.4 1000

10 AFC106M50D16T 5.0 0.12 19.9 2.0 70 D 6.3x5.4 1000

22 AFC226M50E16T 11.0 0.12 9.1 0.7 120 E 8x6.2 1000

33 AFC336M50F24T 16.5 0.12 6.0 0.6 300 F 8x10.2 500

47 AFC476M50G24T 23.5 0.12 4.2 0.3 500 G 10x10.2 500

100 AFC107M50G24T 50.0 0.12 2.0 0.3 500 G 10x10.2 500

220 AFC227M50G24T 110.0 0.12 0.9 0.3 500 G 10x10.2 500

35 Vdc (44 Vdc Sur

50 Vdc ( 63 vdc Sur

Part Numbering System

Type AFC, -55°C to 105°C

SMT Aluminum Electrolytic Capacitors - Low Impedance, 105°C

Ratings Table

Max. Max. Max.

Max. Dissipation ESR @ Impedance Ripple Current

Cap Catalo

DCL Factor @ 120 Hz @ 100 kHz @ 105°C Case Size (mm) Quantity

F Number (

A/2 120 Hz 20 °C 20 °C 100 kHz Code D x L per Reel

min) 20 °C(Ω)(

Ω)(mA)

22 AFC226M06B12T 3.0 0.26 19.6 3.0 60 B 4x5.4 2000

47 AFC476M06C12T 3.0 0.26 9.2 1.8 95 C 5x5.4 1000

100 AFC107M06D16T 6.3 0.26 4.3 1.0 140 D 6.3x5.4 1000

220 AFC227M06E16T 13.9 0.26 2.0 0.4 230 E 8x6.2 1000

330 AFC337M06F24T 20.8 0.26 1.3 0.3 450 F 8x10.2 500

1000 AFC108M06G24T 63.0 0.26 0.43 0.15 670 G 10x10.2 500

1500 AFC158M06G24T 94.5 0.26 0.29 0.15 670 G 10x10.2 500

33 AFC336M10C12T 3.3 0.19 9.6 1.8 95 C 5x5.4 1000

100 AFC107M10E16T 10.0 0.19 3.2 0.4 230 E 8x6.2 1000

150 AFC157M10E16T 15.0 0.19 2.1 0.4 230 E 8x6.2 1000

220 AFC227M10F24T 22.0 0.19 1.4 0.3 450 F 8x10.2 500

470 AFC477M10G24T 47.0 0.19 0.67 0.15 670 G 10x10.2 500

1000 AFC108M10G24T 100.0 0.22 0.36 0.15 670 G 10x10.2 500

10 AFC106M16B12T 3.0 0.16 26.5 3.0 60 B 4x5.4 2000

22 AFC226M16C12T 3.5 0.16 12.1 1.8 95 C 5x5.4 1000

47 AFC476M16D16T 7.5 0.16 5.7 1.0 140 D 6.3x5.4 1000

68 AFC686M16E16T 10.9 0.16 3.9 0.4 230 E 8x6.2 1000

100 AFC107M16E16T 16.0 0.16 2.7 0.4 230 E 8x6.2 1000

220 AFC227M16G24T 35.2 0.16 1.2 0.15 670 G 10x10.2 500

330 AFC337M16G24T 52.8 0.16 0.8 0.15 670 G 10x10.2 500

470 AFC477M16G24T 75.2 0.16 0.6 0.15 670 G 10x10.2 500

680 AFC687M16G24T 108.8 0.16 0.4 0.15 670 G 10x10.2 500

6.8 AFC685M25B12T 3.0 0.14 34.1 3.0 60 B 4x5.4 2000

22 AFC226M25D16T 5.5 0.14 10.6 1.0 140 D 6.3x5.4 1000

33 AFC336M25D16T 8.3 0.14 7.0 1.0 140 D 6.3x5.4 1000

47 AFC476M25E16T 11.8 0.14 4.9 0.4 230 E 8x6.2 1000

68 AFC686M25F24T 17.0 0.14 3.4 0.3 450 F 8x10.2 500

100 AFC107M25F24T 25.0 0.14 2.3 0.3 450 F 8x10.2 500

220 AFC227M25G24T 55.0 0.14 1.1 0.15 670 G 10x10.2 500

330 AFC337M25G24T 82.5 0.14 0.7 0.15 670 G 10x10.2 500

470 AFC477M25G24T 117.5 0.14 0.5 0.15 670 G 10x10.2 500

6.3 Vdc ( 8 Vdc Sur

10 Vdc (13 Vdc Sur

16 Vdc ( 20 Vdc Sur

25 Vdc ( 31 Vdc Sur

10 = 10 Vdc 35 = 35 Vdc

16 = 16 Vdc 50 = 50 Vdc

25 = 25 Vdc

AFC 106 M 16 B 12T

Type Capacitance Capacitance

Tolerance

Voltage Case

Code

Packaging

Information

105 = 1.0 µF

106 = 10 µF

107 = 100 µF

108 = 1000 µF

M = ±20% 12 = Carrier Tape

Width (mm)

T = Tape & Reel

B = Bulk

Type AFC, -55°C to 105°C

SMT Aluminum Electrolytic Capacitors - Low Impedance, 105°C

Typical Performance Curves

0.2

0.4

0.6

0.8

1.2

1.4

10 100 1000 10000 100000 1000000

Ratio to 25°C, 120 Hz Value

65°C

25°C

85°C

0°C

–40°C

45°C

–20°C

105°C

–55°C

0.1

100

10 100 1,000 10,000 100,000 1,000,000

Ratio to 25°C, 120 Hz Value

–40°C

–20°C

0°C

25°C

45°C

85°C

65°C

–55°C

105°C

Capacitance vs. Temperature & Frequency

1500 µF @ 6.3 Vdc (10 X 10.2 mm)

mm)

1500 µF @ 6.3 Vdc (10 X 10.2 mm)

Impedance vs. Temperature and Frequency

ESR vs. Temperature and Frequency

Frequency (Hz)

0.01

0.1

100

10 100 1,000 10,000 100,000 1,000,000

Ratio to 25°C, 120 Hz Value

–40°C

0°C

25°C

65°C85°C

45°C

–20°C

105°C

–55°

Capacitance vs. Temperature & Frequency

Impedance vs. Temperature and Frequency

ESR vs. Temperature and Frequency

0.2

0.4

0.6

0.8

1.2

10 100 1,000 10,000 100,000 1,000,000

Ratio to 25°C, 120 Hz Value

65°C

25°C

85°C

0°C

–40°C

45°C

–20°C

105°C

–55°C

0.1

100

10 100 1,000 10,000 100,000 1,000,000

Ratio to 25°C, 120 Hz Value

–40°C

–20°C

0°C

25°C

45°C

85°C

65°C

–55°C

105°C

Frequency (Hz)

330 µF @ 6.3 Vdc (8 X 10.2 mm)

mm)

0.01

0.1

10 100 1,000 10,000 100,000 1,000,000

Ratio to 25°C, 120 Hz Value

–40°C

0°C

25°C

65°C85°C

45°C

–20°C

105°C

–55°C

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

1.014

CORNELL

DUBILIER

Your Source For Capacitor Solutions

Chip and SMT

Capacitors

Typical Performance Curves

SMT Aluminum Electrolytic Capacitors - Low Impedance, 105°C

Type AFC

Capacitance vs. Temperature & Frequency

Impedance vs. Temperature and Frequency

ESR vs. Temperature and Frequency

0.01

0.1

100

10 100 1,000 10,000 100,000 1,000,000

Ratio to 25°C, 120 Hz Value

–40°C

0°C

25°C

65°C

85°C

45°C

–20°C

105°C

–55°

0.1

100

10 100 1,000 10,000 100,000 1,000,000

Ratio to 25°C, 120 Hz Value

–40°C

–20°C

0°C

25°C

45°C

85°C

65°C

–55°C

105°C

0.2

0.4

0.6

0.8

1.2

10 100 1,000 10,000 100,000 1,000,000

Ratio to 25°C, 120 Hz Value

65°C

25°C

85°C

0°

–40°C

45°C

–20°C

105°C

–55°C

220 µF @ 50 Vdc (10 X 10.2 mm)

Frequency (Hz)

-20

-10

-60 -40 -20 0 20 40 60 80 100 120

Capacitance Change (%)

100

F @ 6.3 Vdc (6.3 X 5.4 mm)

F @ 16 Vdc (6.3 X 5.4 mm)

F @ 50 Vdc (6.3 X 5.4 mm)

Capacitance Change with Temperature

(Typical Performance AFC Series @ 120 Hz)

Temperature (°C)

Dissipation Factor vs. Temperature

0.1

0.2

0.3

0.4

0.5

0.6

-60 -40 -20 0 20 40 60 80 100 120

D.F. (@120 Hz)

100

F @ 6.3 Vdc (6.3 X 5.4 mm)

F @ 16 Vdc (6.3 X 5.4 mm)

F @ 50 Vdc (6.3 X 5.4 mm)

-20

-15

-10

-5

0 500 1,000 1,500 2,000

Capacitance Change (%)

F @ 16 Vdc (4 x 5.4 mm)

F @ 16 Vdc ( 6.3 x 5.4 mm)

330

F @ 16 Vdc (10 x 10.2 mm)

Capacitance Change vs Time

Time (Hours)

(Typical Performance AFC 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 1.015

Chip and SMT

Capacitors

CORNELL

DUBILIER

Your Source For Capacitor Solutions

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

Tape Specifications

A ± 0.2 P1

B ± 0.2

W ± 0.3

4 ± 0.1 1.5 dia 1.75 ± 0.1

F ± 0.1

0.4 t ± 0.2

Component Orientation

Polarity Stripe (-) Cathode

Case Code W A B P 1 F t

A 12.0 3.4 3.5 8.0 5.5 5.8

B 12.0 4.7 4.6 8.0 5.5 5.8

C 12.0 6.0 6.0 12.0 5.5 5.8

D 16.0 7.0 7.0 12.0 7.5 5.8

X 16.0 7.0 7.0 12.0 7.5 8.4

E 16.0 8.7 8.7 12.0 7.5 6.8

F 24.0 8.7 8.7 16.0 11.5 11.0

G 24.0 10.7 10.7 16.0 11.5 11.0

Case CodeWABCDFPS

J 32.0 10.7 10.7 14.5 14.5 14.2 20.0 28.4

K 32.0 10.7 10.7 14.5 18.5 14.2 20.0 28.4

H 32.0 14.0 14.0 18.0 14.5 14.2 24.0 28.4

L 32.0 14.0 14.0 18.0 17.5 14.2 24.0 28.4

P 44.0 17.5 17.5 23.0 17.5 20.2 28.0 40.4

R 44.0 19.5 19.5 26.0 17.5 20.2 32.0 40.4

S 44.0 19.5 19.5 26.0 22.5 20.2 32.0 40.4

U 44 17.5 17.5 23 22.5 20.2 28 40.4

0.2+0.05

0.75+0.1

2.0±0.1 4.0±0.1 ∅1.5±0.1

P±0.1 B±0.5

W±0.3 S±0.1

F±0.1

1.75±0.1

A±0.5

D±0.2

0.5

C±0.5

(mm)

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

Land Pattern:

Reel Specifications

Case Code A B C D E W t

A, B si ze 380±2 50 m in 13.0±0.5 21.0 ±0. 8 2.0±0. 5 14±1 3.0

C, D, E, X s i ze 38 0±2 50 min 13 . 0±0. 5 21. 0 ±0.8 2.0±0. 5 18±1 3.0

F, G si ze 380±2 50 m in 13 .0±0.5 21. 0 ±0.8 2.0±0.5 26±1 3.0

J, K , H, L si ze 330±2 50 m i n 13 . 0±0. 5 21. 0 ±0.8 2.0±0. 5 34±1 3.0

P , R, S, U si ze 330±2 50 m i n 13.0 ±0. 5 21. 0±0. 8 2.0±0.5 46±1 3.0

R: 1.0 mm

(.039 in.)

Case CodeABC

A 0.6 2.2 1.5

B 1.0 2.5 1.6

C 1.5 2.8 1.6

D 2.2 3.0 1.6

E 2.2 4.5 1.6

F 3.2 4.0 2.0

G 4.6 4.3 2.0

J, K 4 4.5 2.0

H 4.0 5.7 2.0

L 4.0 5.7 2.0

P 6.0 6.5 2.5

R, U 6.0 6.5 2.5

S 6.0 7.5 2.5

1234567890123456789

23456789012345678

1234567890123456789

23456789012345678

1234567890123456789

(mm)

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

Outline Drawing

Case Dimensions

Reflow Soldering Temperature Profile:

(mm)

*5.8 +0.1,-0.2 for AFK and AHD Series

Case Peak Max. Time

Code Tem p (°C) @ 200°C

(Sec.)

A, B, C, D, X 240 40

E, F, G, H 230 30

J, K, L, P

R, S, U

Case

Code D ± 0.5 L A ± 0. 2 H (max) I (ref) W P (ref) K

A 3.0 5. 4 +.1,-.2 3. 3 4.5 1.5 0. 55 ± 0. 1 0.6 0.35 + 0. 15/ -0. 20

B 4.0 5. 4 +.1,-.2 4. 3 5.5 1.8 0. 65 ± 0. 1 1.0 0.35 + 0. 15/ -0. 20

C 5.0 5. 4 +.1,-. 2 5.3 6.5 2.2 0. 65 ± 0. 1 1.5 0.35 + 0. 15/ -0. 20

D 6.3 5.4 +.1,-. 2 6.6 7.8 2. 4 0.65 ± 0. 1 1.8 0.35 + 0. 15/-0. 20

X 6. 3 7. 9 ±. 3 6. 6 7.8 2. 6 0.65 ± 0. 1 1.8 0.35 + 0. 15/-0. 20

E 8.0 6. 2 ±. 3 8.3 9. 5 3.4 0. 65 ± 0. 1 2.2 0.35 + 0.15/ -0. 20

F 8.0 10. 2 ±.3 8.3 10 3. 4 0. 90 ± 0.2 3.2 0.70 ± 0. 20

G 10.0 10. 2 ±.3 10. 3 12 3. 5 0. 90 ± 0. 2 4. 6 0.70 ± 0. 20

H 12.5 13. 5 ± . 5 13. 5 15 4. 7 0. 9 ±0.3 4.4 0.70 ± 0. 30

J 10 13.5 10.3 12 3. 5 0. 9 ±0.2 4.6 0.70 ± 0. 20

K 10 17. 5 10. 3 12 3. 5 0. 9 ±0. 2 4. 6 0.70 ± 0. 20

L 12. 5 16. 5 ± . 5 13. 5 15. 0 4.7 0. 9±0. 3 4.4 0.70 ± 0. 30

P 16. 0 16. 5 ± . 5 17.0 19.0 5.5 1. 2±0. 3 6.7 0.70 ± 0. 30

R 18.0 16. 5 ± . 5 19. 0 21. 0 6.5 1.2±0.3 6. 7 0.70 ± 0.30

S 18. 0 21. 5 ± . 5 19.0 21.0 6.5 1. 2±0. 3 6.7 0.70 ± 0. 30

U 16.0 21. 5 17.0 19. 0 6. 7 1. 2±0.3 6. 7 0.70 ± 0. 30

120 seconds

Preheat

Maximum

Time @ 200°C

(see chart right)

Time

160°C

200°C

Peak

Temp.

(see chart

right)

5 seconds

maximum

0.3 mm Max. A

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

Below is a table discribing the usable solvents for cleaning a PC board containing V-Chips.

Recommended Symtoms

So lv en t type Name M anu factu r er use level of Damag e

Wat er Dist i l l ed Wat er 1 None

A l kali ne A qua Cl eaner 210S E P S anei 2

P i ne A l pha S T-100S Aralawa Kasei Kogyo 2

Clean-thru 750H 2

S urfac e act i ve Cl ean-t hru 750L K ao Corporat i on 2

agent Clean-thru 710M 2

S un-el ec B-12 S anyo K asei 2

DK be-c l ean CW-5790 Dai-Ichi K ogyo Seiyaku 2

Petroleum Cold-cl eaner P 3-375 Henk el Hakusui 3

based Techno-c l eaner 219 Sei wa S angyo 3

hydrocarbon A xarel 32 M i ts ui DFC 3

A lcohol base Isopropyl Al cohol 1 None

Techno-care FRW-17 3

S i l i con base Techno-care FRW-17 Toshi ba Corporat i on 3

(Techno-c are F RV -100) 3

Halogenated As ashi -c l ean AK-225A E S Ashahi Gl ass 3

hydrocarbon HCFC141B -MS Dalki n Kogyo 3

Tel pen base Tel pen-cl e aner E C-7R Ni ppon A l pha M et al s 3 s wel l ed seal

Contains

CFC's subj ect

environmental

regulations

Water Base

Solve nt Ba se

None, though

m arki ng i nk

m ay fade

s wel l l i ng on

seal ing rubber

ri ns e and dry

well after

cleaning

None if us ed i n

combination

Use lev el

Number

1 Cleaning i s possi ble

2 Cleaning i s possi ble (m ark i ngs m ay fade)

3 Cleani ng is poss i bl e (Use caut ion. 1 and 2 are bet t er choi ces)

Recommendation

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.

Table 1

Cleaning

V-Chips may be immersed for 5 minutes, safely, in Level 1&2 solvents. Use Level 3

solvents with caution.

1605 East Rodney French Blvd.

New Bedford, MA 02744

(508) 996-8564, Fax(508) 996-3830

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E-mail: cdenb@cornell-dubilier .com

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

AlO3 + 3H2O > 2Al(OH)3

2.) Reaction of hydrated oxide film and chlorine (Dissolution of film)

Al(OH)3 + 3HCl > AlCl3 + 3H2O

3.) Reaction of aluminum and hydrochloric acid (Dissolution of aluminum)

Al + 3HCl > AlCl3 + 3/2H2

4.) Precipitation of aluminum hydroxide

AlCl3 + 3H2O > Al(OH)3 + 3HCl

The entire reaction can be summerized as the following:

Al + Al2O3 + 3HCl3 + 3H2O > 2Al(OH)3 + AlCl3 + AlCl3 + H3/2

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.

HCl

ClCC

HCl =

Chlorosen

ClCC

+(2H)

Electrolysis

reaction

Dichloroethane Dicloroethylene

Fig. 1 Decomposed reaction of cleaning solvents (Free-chlorine)

Free-chlorine Diagram:

V-Chip Cleaning and Coating Guide

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Composition Boiling Point (°C) Common Na me

1.1.1-Trichloroethane 74.1 Chlorosen

Trichloroethylene 87.2 Trichlene

Tetrachloroethylene 121.1 Perchloroethylene

Solvents that should not be used

Table 2

Additional Cleaning Notes:

1.) Solvents containing CFC’s destroy the ozone layer and should be avoided to protect the global environm e n t .

2.) To avoid solvent residue between the capacitor ’s seal and the PC board, make sure the assembly is dried

thoroughly immediately after cleaning.

V-Chip Cleaning and Coating Guide

Coating

Table 3

Below is a list of coatings that are safe for use with V-Chips

Ma nufa cture r Ma te ri al Coa ting Ma te ria l Na me

Acr ylic Ta ffi- 1 1 4 1, Ta ffi- 1 1 4 7

Urethane Taffi-1154

A cryli c Hum i Seal 1B 66

Uret ha ne Hum i Seal 1A 2 7

Dow Corning S ilicon P erugan Z, P erugan C

Ni hon Zeon Urethane Q ui nate S yst e m 160B

Hi t achi Chemical

Boxy Brown

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

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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.