High-Purity Lead-Free Solder Wire – Clean, Safe & Easy to Use

Upgrade your soldering work with this SN99.3 Cu0.7 Lead-Free Solder Wire — a premium, environmentally friendly tin wire designed for electronics repair, PCB work, IC repair, and general electrical projects. With a high-purity alloy composition of 99.3% Tin (Sn) and 0.7% Copper (Cu), this solder wire delivers excellent conductivity, strong joints, and smooth flow every time.

Why Choose Lead-Free Solder Wire?

Traditional lead-based solder poses health and environmental risks. This RoHS-compliant, lead-free formula is a safer choice for hobbyists, professionals, and the environment alike. Learn more about reducing hazardous materials in electronics at the U.S. EPA's guidance on hazardous substances in electronics.

Key Features

Lead-Free Formula: SN99.3 Cu0.7 alloy — RoHS certified and environmentally friendly
2% Rosin Flux Core: Built-in flux cleans the surface during soldering for strong, reliable bonds
Low Spatter & Low Smoke: Minimal mess and fumes for a more comfortable soldering experience
Non-Corrosive: Won't damage sensitive components or circuit boards
Excellent Solderability: Flows smoothly and sets quickly with great insulation resistance
Multiple Diameters Available: Choose from 0.5mm, 0.6mm, 0.8mm, or 1.0mm to suit your project
227°C Melting Point: Compatible with standard soldering irons

Product Specifications

Alloy Composition	SN99.3 / Cu0.7 (99.3% Tin, 0.7% Copper)
Flux Content	2% Rosin Flux Core
Melting Point	227°C
Wire Diameter	0.5mm, 0.6mm, 0.8mm, 1.0mm
Weight	50g / 1.76 oz (including reel)
Applications	Electrical repair, IC repair, PCB soldering, electronics assembly
Compliance	RoHS Compliant, Lead-Free
Country of Origin	Made in China

Perfect For

Electronics hobbyists and DIY makers
Professional PCB and IC repair technicians
Home electrical repair and appliance maintenance
Automotive and general electrical soldering

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For safety guidelines on working with electrical components and soldering tools, refer to OSHA's Electrical Safety Standards.

Frequently Asked Questions

Q: What does "SN99.3 Cu0.7" mean on lead-free solder wire?

A: SN99.3 Cu0.7 refers to the alloy composition of the solder wire — 99.3% Tin (Sn) and 0.7% Copper (Cu). This is a common lead-free formulation that meets RoHS compliance standards and provides strong, reliable solder joints with a melting point of 227°C.

Q: What wire diameter should I choose for electronics repair?

A: For fine electronics work such as IC repair and SMD components, a thinner diameter like 0.5mm or 0.6mm is recommended for precision. For larger joints, PCB through-hole soldering, or general electrical repair, 0.8mm or 1.0mm solder wire is ideal.

Q: Is this solder wire safe to use indoors?

A: Yes. This lead-free solder wire produces less smoke and spatter than traditional leaded solder, making it safer for indoor use. However, always solder in a well-ventilated area and use appropriate eye protection. The RoHS-compliant, non-corrosive formula is designed with user safety in mind.

Q: Does the 50g weight include the spool/reel?

A: Yes, the stated 50g weight includes the plastic reel. The net solder wire weight will be slightly less, depending on the reel. If you need more solder, check our store for additional weight options.

Made with care

Great value

Elegant design

Quality materials

This product is crafted with quality materials to ensure durability and performance. Designed with your convenience in mind, it seamlessly fits into your everyday life.

We strive to process and ship all orders in a timely manner, working diligently to ensure that your items are on their way to you as soon as possible.

We are committed to ensuring a positive shopping experience for all our customers. If for any reason you wish to return an item, we invite you to reach out to our team for assistance, and we will evaluate every return request with care and consideration.