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Lead Free Solder Wire Sn99Ag0.3Cu0.7 SAC0307


Lead Free Solder Wire Sn99Ag0.3Cu0.7 SAC0307

Solder Wire SAC0307

Lead Free Solder Wire Sn99Ag0.3Cu0.7, also known as Solder Wire SAC0307, epitomizes the evolution of soldering technology towards eco-friendly solutions. Comprising 99% tin (Sn), 0.3% silver (Ag), and 0.7% copper (Cu), this solder wire represents a milestone in soldering, striking a balance between performance and environmental responsibility. Its composition underscores the integration of tin, silver, and copper to create a solder wire that excels across various soldering applications. It's suitable for soldering tasks that want an improved electrical conductivity and thermal resistance, but can't afford the price of solder wire SAC305.

Specifications of Lead Free Solder Wire Sn99Ag0.3Cu0.7 SAC0307:

Alloy Composition

99% Tin (Sn), 0.3% Silver (Ag), 0.7% Copper (Cu)

Melting Point


Flux Core Type

Rosin based flux or solid wire without  flux

Flux Content

2% or customized as required


100g/roll, 200g/roll, 500g/roll, 1kg/roll or as required

Wire Diameter

From 0.3mm to 3.2mm


XF Solder or OEM service

Rosin Flux Core Lead Free Solder Wire


Different Diameters of Solder Wire

Options of Diameters

Different Weights of Solder Wire

Options of Sizes


Features of Lead Free Solder Wire Sn99Ag0.3Cu0.7 SAC0307:

Reliable Solder Joints

It generates strong and firm solder joints, contributing to the longevity of soldered connections. It has long service life.

Good Solderability

The silver and copper in this solder brings it a low thermal stress and higher electrical conductivity, ensuring the quality of soldered assemblies.

Eco-Friendly Formulation

The solder wire doesn't contain lead. It complies with environmental regulations and sustainability initiatives and suitable for projects that require RoH  compliant.

Affordable Cost

This solder wire contains only 0.3% of silver, making it much lower cost comparing to SAC305 solder wire. This is good for projects that have limited budgets.


Applications of Lead Free Solder Wire Sn99Ag0.3Cu0.7 SAC0307:

Electronics Manufacturing: Lead-Free Solder Wire Sn99Ag0.3Cu0.7 finds extensive use in creating reliable connections within electronic components, circuit boards, and assemblies. Such as PCBA, microwave ovens, air conditioners, electric kettles, hair dryers, sensors, connectors, switches, etc.


Medical equipment that needs to comply with RoHS regulations and avoid lead contamination, such as pacemakers, defibrillators, ultrasound machines, etc.


Automotive components that require high fatigue resistance and thermal stability, such as ABS systems, engine control units, etc.

Manual Soldering with solder wire

PCB Assembly

Robot Soldering with solder wire

Electronics Manufacturing

jewelry making with solder wire

Jewelry Making


How to use Lead Free Solder Wire Sn99Ag0.3Cu0.7 SAC0307?

Solder wire SAC0307 can be used in manual soldering by using soldering irons or soldering stations, providing very flexible operations on the PCB assembly.


It can also be soldered by automatic soldering machine, performing accurate and high precision soldering tasks.


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