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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Beskrivning Pris Model Number Wire Diameter Percent Lead Product Form Melting Point Percent Silver Percent Tin Flux Type Product Weight Flux Content Percent Percent Copper
RS-artikelnummer 179-6673
VarumärkeRS PRO
267,56 kr
Each
Enheter
RA300 1.2mm 40% Wire 183°C - 60% Rosin 250g 2.2% -
RS-artikelnummer 756-8904
VarumärkeRS PRO
234,82 kr
Each
Enheter
NC600 0.71mm 40% Wire 183°C - 60% Rosin Based 250g 2.2% -
RS-artikelnummer 179-6687
VarumärkeRS PRO
262,23 kr
Each
Enheter
WS700 1.2mm 40% Wire 183°C - 60% Water Soluble 250g 3.3% -
RS-artikelnummer 756-8907
VarumärkeRS PRO
538,53 kr
Each
Enheter
NC600 0.38mm 40% Wire 183°C - 60% Rosin Based 250g 2.2% -
RS-artikelnummer 179-6660
VarumärkeRS PRO
269,48 kr
Each
Enheter
RMA200 1mm 40% Wire 183°C - 60% Rosin 250g 2.2% -
RS-artikelnummer 179-6663
VarumärkeRS PRO
500,03 kr
Each
Enheter
RMA200 1.2mm 40% Wire 183°C - 60% Rosin 500g 2.2% -
RS-artikelnummer 179-6674
VarumärkeRS PRO
500,03 kr
Each
Enheter
RA300 1.2mm 40% Wire 183°C - 60% Rosin 500g 2.2% -
RS-artikelnummer 179-6683
VarumärkeRS PRO
264,89 kr
Each
Enheter
SRA500 2mm 40% Wire 183°C - 60% Rosin 250g 3.3% -
RS-artikelnummer 179-6677
VarumärkeRS PRO
270,76 kr
Each
Enheter
SRA500 0.7mm 40% Wire 183°C - 60% Rosin 250g 3.3% -
RS-artikelnummer 179-6688
VarumärkeRS PRO
510,17 kr
Each
Enheter
WS700 1.27mm 40% Wire 183°C - 60% Water Soluble 500g 3.3% -
RS-artikelnummer 179-6686
VarumärkeRS PRO
512,83 kr
Each
Enheter
WS700 0.7mm 40% Wire 183°C - 60% Water Soluble 500g 3.3% -
RS-artikelnummer 179-6662
VarumärkeRS PRO
262,23 kr
Each
Enheter
RMA200 1.2mm 40% Wire 183°C - 60% Rosin 250g 2.2% -
RS-artikelnummer 179-6676
VarumärkeRS PRO
620,00 kr
Each
Enheter
SRA500 0.5mm 40% Wire 183°C - 60% Rosin 500g 3.3% -
RS-artikelnummer 179-6661
VarumärkeRS PRO
510,91 kr
Each
Enheter
RMA200 1mm 40% Wire 183°C - 60% Rosin 500g 2.2% -
RS-artikelnummer 800-7652
VarumärkeRS PRO
298,59 kr
Each
Enheter
NC601 1.27mm 40% Wire 183°C - 60% Colophony Free- ORL0 250g 2 → 4% -
RS-artikelnummer 179-6671
VarumärkeRS PRO
269,48 kr
Each
Enheter
RA300 1mm 40% Wire 183°C - 60% Rosin 250g 2.2% -
RS-artikelnummer 179-6681
VarumärkeRS PRO
500,03 kr
Each
Enheter
SRA500 1.2mm 40% Wire 183°C - 60% Rosin 500g 3.3% -
RS-artikelnummer 179-6680
VarumärkeRS PRO
510,91 kr
Each
Enheter
SRA500 1mm 40% Wire 183°C - 60% Rosin 500g 3.3% -
RS-artikelnummer 756-8871
VarumärkeRS PRO
421,23 kr
Each
Enheter
- 0.4mm 40% Wire 183°C - 60% Colophony Free- ORL0 250g 2% -
RS-artikelnummer 179-6668
VarumärkeRS PRO
620,00 kr
Each
Enheter
RA300 0.5mm 40% Wire 183°C - 60% Rosin 500g 2.2% -