Solder

Solder, or solder wire, is a fusible metal alloy with a low temperature melting point used to permanently join two metals that have a higher melting point. Soldering is a process commonly used in the electronics industry for PCBs and electronics components, jewellery manufacturing and pipework in plumbing, with the majority of soldering carried out through the use of a soldering iron.

Our range of solder wire contains products from industry leaders like Felder Lottechnik, MBO, Multicore, Weller and RS PRO, with a variety of wire diameters (ranging from 0.23mm to 7mm) and lead content (0% to 70%).

What is solder made of?

The alloys used in solder vary depending on the manufacturer and the intended application, as different applications require different materials.

Soft solder is commercially available at varying concentrations of tin, ranging from 5% to 70%. Higher percentages of tin provide greater tensile strength, with a 60/40 balance being a popular composition.

Lead-free solder is also available, created due to the call to remove or reduce hazardous materials in consumer electronics, which often has a lower melting point than lead-based alloys. Lead-free solder wire may contain copper, zinc, tin, silver, bismuth, antimony and/or traces of other materials depending on its intended use.

What is flux?

In order to prevent the oxidation of the metal alloy and ensure a strong electrical connection and high mechanical strength, soldering wire contains a flux, which can be made of different materials. A flux is a chemical agent that will help to reduce metal oxides (return oxidised metals to their original state) and seal out air from the join, preventing any further oxidation.

There are two main types of flux: acid/active, which contains strong acids and is used in plumbing and metal mending, and rosin/passive, which is used in electronics.

What forms of solder are there?

The majority of solder comes in wire form, with a range of wire diameters available to suit various applications and joints. Solder granules are ideal for soldering machines and tinning crucibles, but these small pellets of solder popular for jewellery making too. Paste solder is ideal for use in printed circuit boards (PCBs) and connecting surface mount electronic components. It is a sticky paste which is applied to a board by printing or painting.


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Description Price Model Number Wire Diameter Percent Lead Product Form Melting Point Percent Silver Percent Tin Flux Type Product Weight Flux Content Percent Percent Copper
RS Stock No. 756-8884
BrandRS PRO
PHP2,676.77
Each
units
SAC305 0.71mm - Wire 217°C 3% 96.5% Rosin Based 250g 3.3% 0.5%
RS Stock No. 619-5615
Mfr. Part No.291340
BrandMulticore
PHP1,567.04
1 Reel of 250 Gram(s)
Reel(s)
362 1.2mm 40% Wire 183°C - 60% Rosin Based 250g 3% -
RS Stock No. 818-3194
BrandRS PRO
PHP263.62
Each
units
- - - - - - - - - - -
RS Stock No. 185-0070
Mfr. Part No.289807
BrandMulticore
PHP6,429.56
1 Reel of 500 Gram(s)
Reel(s)
362 0.7mm - Wire +227°C - 99.3% Activated Rosin 500g 3% 0.7%
RS Stock No. 800-7677
BrandRS PRO
PHP1,441.52
Each
units
NC600 SN100E 0.81mm - Wire 228°C - 99.5% Rosin Based 250g 3.3% 0.5%
RS Stock No. 229-4263
Mfr. Part No.288520
BrandMulticore
PHP2,009.83
1 Reel of 1
Reel(s)
C400 0.7mm 40% Wire 183-188°C - 60% Activated Rosin 250g 2.2% -
RS Stock No. 800-7649
BrandRS PRO
PHP4,168.68
Each
units
SAC305 NC600 0.25mm - Wire 217°C 3% 96.5% Rosin Based 250g 2.2% 0.5%
RS Stock No. 788-3704
Mfr. Part No.T0051388199
BrandWeller
PHP2,235.87
1 Reel of 1
Reel(s)
WSW SAC M1 0.3mm - Wire 217°C 3% 96.5% Rosin 100g 3.5% 0.5%
RS Stock No. 436-4926
Mfr. Part No.442578
BrandMulticore
PHP3,187.40
Each
units
105 0.5mm 0% Wire +217°C 3.8% 95.5% Halogen Free 250g 1.5% 0.7%
RS Stock No. 547-344
Mfr. Part No.SN60 PB 7/10 - 3 CANAUX A11 - 100G
BrandMBO
PHP810.61
1 Reel of 100 Gram(s)
Reel(s)
SN60 PB 0.7mm 40% Wire 183°C - 60% Rosin 100g 2% -
RS Stock No. 818-3204
BrandRS PRO
PHP388.90
Each
units
SN100E 0.8mm - - 227°C 3% 96.5% - 100g 3.3% 0.5%
RS Stock No. 555-235
Mfr. Part No.288322
BrandMulticore
PHP3,595.29
1 Reel of 500 Gram(s)
Reel(s)
362 0.7mm 40% Wire 183-188°C - 60% Halogen Free 500g 3% -
RS Stock No. 756-8862
BrandRS PRO
PHP2,672.47
Each
units
SN100E NC600 0.81mm - Wire 228°C - 99.5% Rosin Based 500g 3.3% 0.5%
RS Stock No. 756-8893
BrandRS PRO
PHP4,806.45
Each
units
SAC305 NC600 0.71mm - Wire 217°C 3% 96.5% Rosin Based 500g 2.2% 0.5%
RS Stock No. 436-4831
Mfr. Part No.288498
BrandMulticore
PHP1,796.62
Each
units
C400 0.46mm 40% Wire 183-188°C - 60% Halogen Free 250g 2.2% -
RS Stock No. 788-3708
Mfr. Part No.T0051388299
BrandWeller
PHP2,244.27
1 Reel of 1
Reel(s)
WSW SAC M1 0.5mm - Wire 217°C 3% 96.5% Rosin 100g 3.5% 0.5%
RS Stock No. 185-0042
Mfr. Part No.291275
BrandMulticore
PHP3,493.54
1 Reel of 250 Gram(s)
Reel(s)
362 1.2mm - Wire +227°C - 99.3% Water Wash 250g 3% 0.7%
RS Stock No. 800-7630
BrandRS PRO
PHP2,932.74
Each
units
NC600 SN100E 1.01mm - Wire 228°C - 99.5% Rosin Based 500g 3.3% 0.5%
RS Stock No. 788-3714
Mfr. Part No.T0051388599
BrandWeller
PHP3,936.77
1 Reel of 1
Reel(s)
WSW SAC M1 0.8mm - Wire 217°C 3% 96.5% Rosin 100g 3.5% 0.5%
RS Stock No. 756-8904
BrandRS PRO
PHP1,200.47
Each
units
NC600 0.71mm 40% Wire 183°C - 60% Rosin Based 250g 2.2% -