Solder Pastes

Solder paste is a type of solder used when manufacturing PCBs to connect surface mount components to pads on the board. The paste is a mixture of small solder spheres with flux. The paste initially adheres components in place because of its stickiness. You then use heat to melt the paste to form a mechanical bond and an electrical connection. Solder paste is applied to the board by stencil printing and the components are put in place by a pick and place machine or by hand. Defects in the circuit-board assembly are caused due to issues in the solder-paste printing process or due to defects in the solder paste. This can give short circuits, incomplete circuits, and head on pillow defects.


How to use Solder paste?


Remove oil, grease, polishing compound and any excessive oxides from the joint. Make sure that the joint is smooth, flat and free from any burs. Apply the solder paste to the top joint. The paste will not fill large gaps so make sure that the pieces to be soldered actually touch. Apply heat to the piece away from the joint, keep the heat source moving to prevent overheating the paste. Once the paste flows to remove the heat source.


Typical Applications for Solder Paste


Solder pastes are used in mass production of PCBs and prototype PCB assembly.


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Description Price Lead Free Trade Name Package Type Package Size Model Number
RS Stock No. 835-2699
Mfr. Part No.SKU-0018
$12.79
Each
units
- Electric Paint Pen 10ml -
RS Stock No. 184-9985
Mfr. Part No.291264
BrandMulticore
$57.10
Each
units
- - Syringe 25g -
RS Stock No. 835-2693
Mfr. Part No.SKU-0216
$34.54
Each
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- Electric Paint Jar 50ml -
RS Stock No. 184-9991
Mfr. Part No.291266
BrandMulticore
$83.80
Each
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- - Syringe 75g -
RS Stock No. 551-693
Mfr. Part No.291337
BrandMulticore
$57.77
Each
units
- - Syringe 25g -
RS Stock No. 506-4289
Mfr. Part No.653555
BrandMulticore
$149.19
Each
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- - Tub 500g -
RS Stock No. 832-9775
Mfr. Part No.1817240
BrandHenkel
$147.55
Each
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Yes Loctite HF212 SAC0307 AGS Jar 500g -
RS Stock No. 506-4302
Mfr. Part No.698840
BrandMulticore
$251.43
Each
units
Yes - Tub 500g -
RS Stock No. 910-6790
Mfr. Part No.2002845
BrandHenkel
$269.16
Each
units
Yes - Jar 500g -
RS Stock No. 832-9766
Mfr. Part No.1817229
BrandHenkel
$193.77
Each
units
Yes Loctite HF212 97SC AGS Jar 500g -
RS Stock No. 832-9750
Mfr. Part No.1791137
BrandHenkel
$235.49
Each
units
Yes Loctite HF212 97SC DAP Jar 500g -
RS Stock No. 146-6199
Mfr. Part No.SMDLTLFP
BrandCHIPQUIK
$37.04
Each
units
Yes - Syringe 15g -
RS Stock No. 146-6200
Mfr. Part No.SMDLTLFP10T5
BrandCHIPQUIK
$96.82
Each
units
Yes - Syringe 35g -
RS Stock No. 146-2876
Mfr. Part No.4902P-15G
$37.71
Each
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Yes - Syringe 15g -
RS Stock No. 146-6201
Mfr. Part No.SMDLTLFP250T3
BrandCHIPQUIK
$132.17
Each
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Yes - Jar 250g -
RS Stock No. 146-6194
Mfr. Part No.SMD291SNL10T5
BrandCHIPQUIK
$113.95
Each
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Yes SMD291SN Syringe 35g -
RS Stock No. 146-6202
Mfr. Part No.SMDLTLFP50T3
BrandCHIPQUIK
$64.49
Each
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Yes - Jar 50g -
RS Stock No. 146-6651
Mfr. Part No.SMD291NL
BrandCHIPQUIK
$28.35
Each
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Yes - Syringe 5g SMD291NL
RS Stock No. 146-6195
Mfr. Part No.SMD291SNL250T3
BrandCHIPQUIK
$150.29
Each
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Yes SMD291SN Jar 250g -
RS Stock No. 146-6188
Mfr. Part No.SMD291AX10
BrandCHIPQUIK
$45.97
Each
units
- SMD291AX Syringe 35g -