Weller WSW SAC L0 T0051388499 Lead-Free Solder Wire, 0.5 mm, 100 g

Weller WSW SAC L0 T0051388499 is lead-free solder wire listed with a 0.5 mm diameter, Sn96.5Ag3.0Cu0.5 alloy and 3.5% flux content. Its fine diameter and continuous flux-core claim may suit detailed hand soldering, while the listing's material field conflicts with the solder-wire description.

At a glance

The listing identifies a silver-bearing Sn96.5Ag3.0Cu0.5 lead-free alloy and 3.5% flux content.
Weller claims a continuous flux core and reduced solder splash, with faster, homogeneous wetting also stated in manufacturer material.
A 0.5 mm wire diameter is suited to controlled feeding where a finer wire is preferred.

Price

£25.65Save 15%

Reference price: ~~£30.18~~

Price checked: 14 Nov 2026

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Pros and cons

Pros

Fine 0.5 mm diameter gives the user control over how much solder is fed to a joint.
Manufacturer claims a continuous flux core and reduced splash, which may help keep soldering work cleaner.

Technical specifications

14 specifications

Identity and format
Brand	Weller
Model	T0051388499
Listed form	Solid, Round
Shape	wire
Colour	silver

Solder details
Diameter	0.5 Millimetres
Alloy	Sn96.5Ag3.0Cu0.5
Flux content	3.5%
Lead status	Lead Free
Quantity	100g

Weight and materials
Weight listed	0.22 Pounds
Material listed	Carbon Steel
Finish type	Unfinished
Grade rating	Commercial

What to know before buying

Listing details to confirm

The listing's 0.5 mm diameter, Sn96.5Ag3.0Cu0.5 alloy, 3.5% flux and 100 g quantity are stated in the title, while its details also list Carbon Steel as the material and omit the alloy and flux fields. Confirm the exact selected item and material description before purchase. Manufacturer performance and splash-reduction statements are claims, not independently verified results.

What’s in the box

Included

Solder wire

Who is it for?

A good fit for

Electronics or repair work where a relatively fine 0.5 mm solder wire is useful.
Buyers seeking the listed lead-free silver-bearing alloy and 3.5% flux content.

Less suited to

Buyers who need a confirmed material specification without checking the conflicting listing details.
Work requiring a different wire diameter, alloy or flux formulation.

Weller WSW SAC L0 T0051388499 Lead-Free Solder Wire, 0.5 mm, 100 g · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.4 / 5 · 32 ratings

5 stars74%74%
4 stars7%7%
3 stars8%8%
2 stars6%6%
1 star5%5%

Aggregate ratings lean positive, with most ratings in the highest star category, but a smaller spread of lower ratings shows experiences are not uniformly positive. These figures do not explain why customers rated it as they did, so they offer limited guidance on soldering results or consistency for a particular job.

Frequently asked questions

What alloy does the listing specify?

The title gives Sn96.5Ag3.0Cu0.5 and describes the wire as lead-free. The details separately list Carbon Steel as the material, so confirm the product specification if this distinction matters.

What is the wire diameter and pack quantity?

The title states a 0.5 mm diameter and 100 g quantity.

Does it contain flux?

The title lists 3.5% flux content. Manufacturer material also claims a continuous flux core, but that performance statement is not independently verified.