Chip and SMT Capacitors 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: Rated Voltage: Capacitance: Capacitance Tolerance: Leakage Current: Ripple Current Multiplier: -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 50/60 Hz 120 Hz 1 kHz 10 kHz 100 kHz 0.7 0.75 0.9 0.95 1.0 Dissipation Factor: See Ratings Table Load Life: 1000 h @ +105°C ∆ Capacitance ± 20% DF: ≤200% of limit DCL: ≤100% of limit Shelf Life: 1000 h @ +105°C ∆ Capacitance ± 20% DF: ≤200% of limit DCL: ≤100% of limit AFC Series Marking Outline Drawing Capacitance (µF) K 0.3 mm Max. 220 A Series 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 F G 1.012 D ± 0.5 4.0 5.0 6.3 8.0 8.0 10.0 L 5.4 +.1,-.2 5.4 +.1,-.2 5.4 +.1,-.2 6.2 ±.3 10.2 ±.3 10.2 ±.3 A ± 0.2 4.3 5.3 6.6 8.3 8.3 10.3 H (max) 5.5 6.5 7.8 9.5 10 12 I (ref) 1.8 2.2 2.4 3.4 3.4 3.5 W 0.65 ± 0.65 ± 0.65 ± 0.65 ± 0.90 ± 0.90 ± 0.1 0.1 0.1 0.1 0.2 0.2 1605 East Rodney French Blvd. New Bedford, MA 02744 (508) 996-8564, Fax (508) 996-3830 http://www.cornell-dubilier.com E-mail: [email protected] P (ref) 1.0 1.5 1.8 2.2 3.2 4.6 K 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 0.70 ± 0.20 CORNELL DUBILIER Your Source For Capacitor Solutions SMT Aluminum Electrolytic Capacitors - Low Impedance, 105°C Ratings Table Max. Max. Max. Dissipation ESR @ Impedance Ripple Current Factor @ 120 Hz @ 100 kHz @ 105°C 120 Hz 20 °C 20 °C 100 kHz (Ω) (Ω) 20 °C (mA) 6.3 Vdc ( 8 Vdc Surge) 0.26 19.6 3.0 60 0.26 9.2 1.8 95 0.26 4.3 1.0 140 0.26 2.0 0.4 230 0.26 1.3 0.3 450 0.26 0.43 0.15 670 0.26 0.29 0.15 670 10 Vdc (13 Vdc Surge) 0.19 9.6 1.8 95 0.19 3.2 0.4 230 0.19 2.1 0.4 230 0.19 1.4 0.3 450 0.19 0.67 0.15 670 0.22 0.36 0.15 670 16 Vdc ( 20 Vdc Surge) 0.16 26.5 3.0 60 0.16 12.1 1.8 95 0.16 5.7 1.0 140 0.16 3.9 0.4 230 0.16 2.7 0.4 230 0.16 1.2 0.15 670 0.16 0.8 0.15 670 0.16 0.6 0.15 670 0.16 0.4 0.15 670 25 Vdc ( 31 Vdc Surge) 0.14 34.1 3.0 60 0.14 10.6 1.0 140 0.14 7.0 1.0 140 0.14 4.9 0.4 230 0.14 3.4 0.3 450 0.14 2.3 0.3 450 0.14 1.1 0.15 670 0.14 0.7 0.15 670 0.14 0.5 0.15 670 Cap µF Catalog Number Max. DCL (µA/2 min) 22 47 100 220 330 1000 1500 AFC226M06B12T AFC476M06C12T AFC107M06D16T AFC227M06E16T AFC337M06F24T AFC108M06G24T AFC158M06G24T 3.0 3.0 6.3 13.9 20.8 63.0 94.5 33 100 150 220 470 1000 AFC336M10C12T AFC107M10E16T AFC157M10E16T AFC227M10F24T AFC477M10G24T AFC108M10G24T 3.3 10.0 15.0 22.0 47.0 100.0 10 22 47 68 100 220 330 470 680 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 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 1 2.2 3.3 4.7 6.8 10 22 33 47 100 220 330 AFC105M35B12T AFC225M35B12T AFC335M35B12T AFC475M35B12T AFC685M35C12T AFC106M35C12T AFC226M35D16T AFC336M35E16T AFC476M35E16T AFC107M35G24T AFC227M35G24T AFC337M35G24T 3.0 3.0 3.0 3.0 3.0 3.5 7.7 11.6 16.5 35.0 77.0 115.5 0.12 0.12 0.12 0.12 0.12 0.12 0.12 0.12 0.12 0.12 0.12 0.12 1 2.2 3.3 4.7 10 22 33 47 100 220 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 35 Vdc (44 Vdc Surge) 199 3.0 90.4 3.0 60.3 3.0 42.4 3.0 29.3 1.8 19.9 1.8 9.1 1.0 6.0 0.4 4.2 0.4 2.0 0.2 0.9 0.15 0.6 0.15 50 Vdc ( 63 vdc Surge) 199 5.0 90.5 5.0 60.3 5.0 42.4 3.0 19.9 2.0 9.1 0.7 6.0 0.6 4.2 0.3 2.0 0.3 0.9 0.3 Case Code Size (mm) Quantity DxL per Reel B C D E F G G 4x5.4 5x5.4 6.3x5.4 8x6.2 8x10.2 10x10.2 10x10.2 2000 1000 1000 1000 500 500 500 C E E F G G 5x5.4 8x6.2 8x6.2 8x10.2 10x10.2 10x10.2 1000 1000 1000 500 500 500 B C D E E G G G G 4x5.4 5x5.4 6.3x5.4 8x6.2 8x6.2 10x10.2 10x10.2 10x10.2 10x10.2 2000 1000 1000 1000 1000 500 500 500 500 B D D E F F G G G 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 60 60 60 60 95 95 140 230 230 670 670 670 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 8x6.2 10x10.2 10x10.2 10x10.2 2000 2000 2000 2000 1000 1000 1000 1000 1000 500 500 500 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 Part Numbering System AFC 106 M Type Capacitance Capacitance Tolerance 105 106 107 108 = = = = 1.0 µF 10 µF 100 µF 1000 µF M = ±20% CORNELL DUBILIER Your Source For Capacitor Solutions 16 B Voltage Case Code 10 = 10 Vdc 35 = 35 Vdc 16 = 16 Vdc 50 = 50 Vdc 25 = 25 Vdc 1605 East Rodney French Blvd. New Bedford, MA 02744 (508) 996-8564, Fax (508) 996-3830 http://www.cornell-dubilier.com E-mail: [email protected] 12T Packaging Information 12 = Carrier Tape Width (mm) T = Tape & Reel B = Bulk 1.013 Chip and SMT Capacitors 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 1 .4 8 5 °C 1 6 5 °C 4 5 °C Ratio to 25°C, 120 Hz Value 1 0 5 °C Ratio to 25°C, 120 Hz Value 1500 µF @ 6.3 Vdc (10 X 10.2 mm) 330 µF @ 6.3 Vdc (8 X 10.2 mm) 1 .2 0 .8 2 5 °C 0 .6 0 °C – 2 0 °C 0 .4 – 4 0 °C – 5 5 °C 1 .2 1 0 5 °C 8 5 °C 6 5 °C 1 0 .8 4 5 °C 2 5 °C 0 .6 0 °C – 2 0 °C 0 .4 – 4 0 °C 0 .2 0 .2 0 – 5 5 °C 0 10 100 1 ,0 0 0 1 0 ,0 0 0 1 0 0 ,0 0 0 1 ,0 0 0 ,0 0 0 10 100 Frequency (Hz) 10000 100000 1500 µF @ 6.3 Vdc (10 X 10.2 mm) 100 –55°C 10 –40°C –20°C 0°C 1 25°C 45°C 65°C –55°C 10 –40°C –20°C 0°C 1 25°C 45°C 65°C 85°C 105°C 0.1 85°C 105°C 0.1 10 100 1,000 10,000 100,000 1,000,000 10 100 330 µF @ 6.3 Vdc (8 X 10.2 mm) mm) –55°C –40°C –20°C 0.1 0°C 25°C 0.01 10 100 1,000 10,000 1,000,000 10 –55° –40°C 1 –20°C 0°C 25°C 0.1 45°C 65°C 100,000 1500 µF @ 6.3 Vdc (10 X 10.2 mm) mm) 100 Ratio to 25°C, 120 Hz Value 1 10,000 Impedance vs. Temperature and Frequency Impedance vs. Temperature and Frequency 10 1,000 Frequency (Hz) Frequency (Hz) 45°C 85°C 105°C 100,000 65°C 85°C 105°C 0.01 1,000,000 10 100 1,000 10,000 100,000 1,000,000 Frequency (Hz) Frequency (Hz) 1.014 1000000 ESR vs. Temperature and Frequency 330 µF @ 6.3 Vdc (8 X 10.2 mm) Ratio to 25°C, 120 Hz Value Ratio to 25°C, 120 Hz Value 1000 Frequency (Hz) ESR vs. Temperature and Frequency 100 Ratio to 25°C, 120 Hz Value Chip and SMT Capacitors Type AFC, -55°C to 105°C 1605 East Rodney French Blvd. New Bedford, MA 02744 (508) 996-8564, Fax (508) 996-3830 http://www.cornell-dubilier.com E-mail: [email protected] CORNELL DUBILIER Your Source For Capacitor Solutions SMT Aluminum Electrolytic Capacitors - Low Impedance, 105°C Typical Performance Curves Capacitance vs. Temperature & Frequency 105°C (Typical Performance AFC Series @ 120 Hz) 20 85°C 65°C 1 0.8 Capacitance Change (%) Ratio to 25°C, 120 Hz Value Capacitance Change with Temperature 220 µF @ 50 Vdc (10 X 10.2 mm) 1.2 45°C 25°C 0.6 0°C 0.4 –20°C –40°C 0.2 10 0 100 µF @ 6.3 Vdc (6.3 X 5.4 mm) -10 47 µF @ 16 Vdc (6.3 X 5.4 mm) 10 µF @ 50 Vdc (6.3 X 5.4 mm) –55°C 0 -20 10 100 1,000 10,000 100,000 -60 1,000,000 -40 -20 Frequency (Hz) 60 80 100 120 (Typical Performance AFC Series @ 120 Hz) 0.6 0.5 –55°C D.F. (@120 Hz) Ratio to 25°C, 120 Hz Value 40 Dissipation Factor vs. Temperature 220 µF @ 50 Vdc (10 X 10.2 mm) 10 20 Temperature (°C) ESR vs. Temperature and Frequency 100 0 –40°C –20°C 0°C 1 25°C 100 µF @ 6.3 Vdc (6.3 X 5.4 mm) 47 µF @ 16 Vdc (6.3 X 5.4 mm) 0.4 10 µF @ 50 Vdc (6.3 X 5.4 mm) 0.3 0.2 45°C 0.1 65°C 85°C 105°C 0 .1 0 10 100 1 ,0 0 0 1 0 ,0 0 0 1 0 0 ,0 0 0 1 ,0 0 0 ,0 0 0 -60 -40 -20 Frequency (Hz) 0 20 40 60 80 100 120 Temperature (°C) Impedance vs. Temperature and Frequency Capacitance Change vs Time 220 µF @ 50 Vdc (10 X 10.2 mm) (Typical Performance AFC Series) 10 100 Capacitance Change (%) Ratio to 25°C, 120 Hz Value 1 0 µ F @ 1 6 V d c (4 x 5 .4 m m ) 10 –55° –40°C 1 –20°C 0°C 0.1 45°C 25°C 5 4 7 µ F @ 1 6 V d c ( 6 .3 x 5 .4 m m ) 3 3 0 µ F @ 1 6 V d c (1 0 x 1 0 .2 m m ) 0 -5 -1 0 -1 5 65°C 85°C 105°C 0.01 10 100 1,000 10,000 -2 0 100,000 1,000,000 0 Frequency (Hz) 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: [email protected] 500 1 ,0 0 0 1 ,5 0 0 2 ,0 0 0 Time (Hours) 1.015 Chip and SMT Capacitors Type AFC 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 0.4 F ± 0.1 W ± 0.3 B ± 0.2 A ± 0.2 Case Code A B C D X E F G W 12.0 12.0 12.0 16.0 16.0 16.0 24.0 24.0 A 3.4 4.7 6.0 7.0 7.0 8.7 8.7 10.7 0.2+0.05 P1 B 3.5 4.6 6.0 7.0 7.0 8.7 8.7 10.7 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 (mm) t 5.8 5.8 5.8 5.8 8.4 6.8 11.0 11.0 4.0±0.1 2.0±0.1 ∅1.5±0.1 0.5 0.75+0.1 D±0.2 1.75±0.1 F±0.1 W±0.3 A±0.5 S±0.1 P±0.1 Case Code J K H L P R S U W 32.0 32.0 32.0 32.0 44.0 44.0 44.0 44 A 10.7 10.7 14.0 14.0 17.5 19.5 19.5 17.5 B±0.5 B 10.7 10.7 14.0 14.0 17.5 19.5 19.5 17.5 C 14.5 14.5 18.0 18.0 23.0 26.0 26.0 23 1605 East Rodney French Blvd. New Bedford, MA 02744 (508) 996-8564, Fax(508) 996-3830 http://www.cornell-dubilier.com E-mail: [email protected] D 14.5 18.5 14.5 17.5 17.5 17.5 22.5 22.5 F 14.2 14.2 14.2 14.2 20.2 20.2 20.2 20.2 P 20.0 20.0 24.0 24.0 28.0 32.0 32.0 28 C±0.5 (mm) S 28.4 28.4 28.4 28.4 40.4 40.4 40.4 40.4 AVS, AHA, AFC, AFK, AHD, AEB Tape and Reel Specifications Reel Specifications E C B D R: 1.0 mm (.039 in.) t A W (mm) Case Code A, B size C, D, E, X size F, G size J, K, H, L size P, R, S, U size A 380±2 380±2 380±2 330±2 330±2 B 50 min 50 min 50 min 50 min 50 min C 13.0±0.5 13.0±0.5 13.0±0.5 13.0±0.5 13.0±0.5 D 21.0±0.8 21.0±0.8 21.0±0.8 21.0±0.8 21.0±0.8 E 2.0±0.5 2.0±0.5 2.0±0.5 2.0±0.5 2.0±0.5 Land Pattern: C 1234567890123456789 1234567890123456789 1234567890123456789 1234567890123456789 1234567890123456789 1234567890123456789 1234567890123456789 1234567890123456789 1234567890123456789 1234567890123456789 1234567890123456789 1234567890123456789 1234567890123456789 1234567890123456789 1234567890123456789 1234567890123456789 1234567890123456789 1234567890123456789 1234567890123456789 1234567890123456789 1234567890123456789 1234567890123456789 1234567890123456789 1234567890123456789 1234567890123456789 1234567890123456789 1234567890123456789 1234567890123456789 1234567890123456789 1234567890123456789 A B B (mm) Case Code A B C D E F G J, K H L P R, U S A 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 B 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 C 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 1605 East Rodney French Blvd. New Bedford, MA 02744 (508) 996-8564, Fax(508) 996-3830 http://www.cornell-dubilier.com E-mail: [email protected] W 14±1 18±1 26±1 34±1 46±1 t 3.0 3.0 3.0 3.0 3.0 AVS, AHA, AFC, AFK, AHD, AEB Reflow Solder & Case Dimensions Reflow Soldering Temperature Profile: Peak Temp. (see chart right) 5 seconds maximum Case Code Peak Temp (°C) A, B, C, D, X E, F, G, H J, K, L, P R, S, U 240 230 200°C 160°C Maximum Time @ 200°C (see chart right) 120 seconds Preheat Max. Time @ 200°C (Sec.) 40 30 Time Outline Drawing K 0.3 mm Max. A I D H P I W L Case Dimensions (mm) Case Code D ± 0.5 A 3.0 B 4.0 C 5.0 D 6.3 X 6.3 E 8.0 F 8.0 G 10.0 H 12.5 J 10 K 10 L 12.5 P 16.0 R 18.0 S 18.0 U 16.0 *5.8 +0.1,-0.2 for AFK L A ± 0.2 5.4 +.1,-.2 3.3 5.4 +.1,-.2 4.3 5.4 +.1,-.2 5.3 5.4 +.1,-.2 6.6 7.9 ±.3 6.6 6.2 ±.3 8.3 10.2 ±.3 8.3 10.2 ±.3 10.3 13.5 ± .5 13.5 13.5 10.3 17.5 10.3 16.5 ± .5 13.5 16.5 ± .5 17.0 16.5 ± .5 19.0 21.5 ± .5 19.0 21.5 17.0 and AHD Series 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 1605 East Rodney French Blvd. New Bedford, MA 02744 (508) 996-8564, Fax(508) 996-3830 http://www.cornell-dubilier.com E-mail: [email protected] W P (ref) 0.55 ± 0.1 0.6 0.65 ± 0.1 1.0 0.65 ± 0.1 1.5 0.65 ± 0.1 1.8 0.65 ± 0.1 1.8 0.65 ± 0.1 2.2 0.90 ± 0.2 3.2 0.90 ± 0.2 4.6 0.9 ±0.3 4.4 0.9 ±0.2 4.6 0.9 ±0.2 4.6 0.9±0.3 4.4 1.2±0.3 6.7 1.2±0.3 6.7 1.2±0.3 6.7 1.2±0.3 6.7 K 0.35 + 0.15/-0.20 0.35 + 0.15/-0.20 0.35 + 0.15/-0.20 0.35 + 0.15/-0.20 0.35 + 0.15/-0.20 0.35 + 0.15/-0.20 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 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 Solvent type Name 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 Surface active agent Manufacturer Water Base Recommended use level Symtoms of Damage 1 2 2 2 2 2 2 2 None Sanei Aralaw a Kasei Kogyo Kao Corporation Sanyo Kasei Dai-Ichi Kogyo Seiyaku None, though marking ink may fade Solvent Base Petroleum based Cold-cleaner P3-375 Henkel Hakusui 3 Techno-cleaner 219 Seiwa Sangyo 3 hydrocarbon Axarel 32 Mitsui DFC 3 Alcohol base Isopropyl Alcohol Techno-care FRW-17 Techno-care FRW-17 (Techno-care FRV-100) Silicon base Halogenated hydrocarbon Telpen base Toshiba Corporation 1 3 3 3 Asashi-clean AK-225AES Ashahi Glass 3 HCFC141B-MS Dalkin Kogyo 3 Telpen-cleaner EC-7R Nippon Alpha Metals 3 swellling on sealing rubber rinse and dry well after cleaning None None if used in combination Contains CFC's subject to environmental regulations swelled seal Use level Recommendation Number 1 Cleaning is possible 2 Cleaning is possible (markings may fade) 3 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: [email protected] V-Chip Cleaning and Coating Guide Free-chlorine Diagram: Cl Cl H C C Cl H Electrolysis reaction H H H Cl C C H Cl Cl + (2H) Chlorosen HCl + H H Cl C C H H H Cl Dichloroethane HCl Cl C + = C H Cl 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 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. 1605 East Rodney French Blvd. New Bedford, MA 02744 (508) 996-8564, Fax(508) 996-3830 http://www.cornell-dubilier.com E-mail: [email protected] V-Chip Cleaning and Coating Guide Solvents that should not be used Table 2 Composition Boiling Point (°C) 1.1.1-Trichloroethane 74.1 Trichloroethylene 87.2 Tetrachloroethylene 121.1 Common Name Chlorosen Trichlene 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 Hitachi Chemical Boxy Brown Dow Corning Nihon Zeon 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 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: [email protected] 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: [email protected]