SM015A100JAN120 Datasheet, PDF (75/112 Pages) AVX Corporation – AVX Advanced Ceramic Capacitors for Power Supply, High Voltage and Tip and Ring Applications

Surface Mounting Guide
MLC Chip Capacitors
REFLOW SOLDERING
D2
D1 D3
D4
D5
Dimensions in
millimeters (inches)
Case Size
0805 (LD05)
1206 (LD06)
*1210 (LD10)
*1808 (LD08)
*1812 (LD12)
*1825 (LD13)
*2220 (LD20)
*2225 (LD14)
*HQCC
*3640 (LD40)
*HQCE
D1
3.00 (0.120)
4.00 (0.160)
4.00 (0.160)
5.60 (0.220)
5.60 (0.220)
5.60 (0.220)
6.60 (0.260)
6.60 (0.260)
6.60 (0.260)
10.67 (0.427)
10.67 (0.427)
*AVX recommends reflow soldering only.
D2
1.00 (0.040)
1.00 (0.040)
1.00 (0.040)
1.00 (0.040)
1.00 (0.040)
1.00 (0.040)
1.00 (0.040)
1.00 (0.040)
1.00 (0.040)
1.52 (0.060)
1.52 (0.060)
D3
1.00 (0.040)
2.00 (0.090)
2.00 (0.090)
3.60 (0.140)
3.60 (0.140)
3.60 (0.140)
4.60 (0.180)
4.60 (0.180)
4.60 (0.180)
7.62 (0.300)
7.62 (0.300)
millimeters (inches)
D4
1.00 (0.040)
1.00 (0.040)
1.00 (0.040)
1.00 (0.040)
1.00 (0.040)
1.00 (0.040)
1.00 (0.040)
1.00 (0.040)
1.00 (0.040)
1.52 (0.060)
1.52 (0.060)
D5
1.25 (0.050)
1.60 (0.060)
2.50 (0.100)
2.00 (0.080)
3.00 (0.120)
6.35 (0.250)
5.00 (0.200)
6.35 (0.250)
6.35 (0.250)
10.16 (0.400)
10.16 (0.400)
Component Pad Design
Component pads should be designed to achieve good
solder filets and minimize component movement during
reflow soldering. Pad designs are given below for the most
common sizes of multilayer ceramic capacitors for both
wave and reflow soldering. The basis of these designs is:
• Pad width equal to component width. It is permissible to
decrease this to as low as 85% of component width but it
is not advisable to go below this.
• Pad overlap 0.5mm beneath component.
• Pad extension 0.5mm beyond components for reflow and
1.0mm for wave soldering.
WAVE SOLDERING
D2
D1 D3
D4
D5
Case Size
D1
0805
4.00 (0.15)
1206
5.00 (0.19)
Dimensions in millimeters (inches)
D2
1.50 (0.06)
1.50 (0.06)
D3
1.00 (0.04)
2.00 (0.09)
D4
1.50 (0.06)
1.50 (0.06)
D5
1.25 (0.05)
1.60 (0.06)
Component Spacing
For wave soldering components, must be spaced sufficiently
far apart to avoid bridging or shadowing (inability of solder to
penetrate properly into small spaces). This is less important
for reflow soldering but sufficient space must be allowed to
enable rework should it be required.
≥1.5mm (0.06)
≥1mm (0.04)
≥1mm (0.04)
74
Preheat & Soldering
The rate of preheat should not exceed 4°C/second to
prevent thermal shock. A better maximum figure is about
2°C/second.
For capacitors size 1206 and below, with a maximum
thickness of 1.25mm, it is generally permissible to allow a
temperature differential from preheat to soldering of 150°C.
In all other cases this differential should not exceed 100°C.
For further specific application or process advice, please
consult AVX.
Cleaning
Care should be taken to ensure that the capacitors are
thoroughly cleaned of flux residues especially the space
beneath the capacitor. Such residues may otherwise
become conductive and effectively offer a low resistance
bypass to the capacitor.
Ultrasonic cleaning is permissible, the recommended
conditions being 8 Watts/litre at 20-45 kHz, with a process
cycle of 2 minutes vapor rinse, 2 minutes immersion in the
ultrasonic solvent bath and finally 2 minutes vapor rinse.