Weller T0051388899 Lead Free Solder Alloy Spool 250 G

Product Description

The WELLER T0051388899 is a lead-free solder alloy supplied on a 250 g spool, designed for use in electrical, electronic, and precision soldering applications. The alloy has a minimum melting temperature of 422.6 degrees F and a maximum melting temperature of 429.8 degrees F, giving it a narrow working range that supports clean, reliable joints. Wire diameter is 1.0 mm. This solder meets the requirements of applications where lead-free materials are mandated, including electronics assembly, repair work, and regulated-industry projects. It is a direct-use consumable installed by electricians, electronics technicians, HVAC service techs, and other trade professionals who perform soldering as part of system installation or repair.

This solder is suited for a wide range of soldering tasks including electrical and electronic assembly, circuit board repair, HVAC control board service, automotive electronics, solar panel wiring, aerospace and military electronics, medical device assembly, and robotic soldering applications. The 250 g spool format is practical for bench work and field service kits alike. Its lead-free alloy composition supports compliance with RoHS and similar regulations in professional and commercial environments.

Key Features

• Lead-free alloy formulation for compliance with RoHS and lead-restricted applications
• Narrow melt range of 422.6 to 429.8 degrees F for consistent joint formation
• 1.0 mm wire diameter suitable for general-purpose and fine-pitch soldering
• 250 g spool provides extended supply for bench work or recurring field service
• Suitable for electronics, HVAC controls, automotive, solar, aerospace, and medical device applications

Compatibility

Designed for use in electrical, electronic, and precision soldering applications including HVAC control board service, automotive electronics, solar wiring, aerospace and military electronics, medical device assembly, and robotic soldering systems where lead-free solder alloy is required.

Installation Notes

Soldering work on live electrical or electronic systems must be performed with power fully de-energized before any iron contact with conductors or components. Use an appropriately rated soldering iron or station capable of reaching the alloy melting temperature range. Ensure adequate ventilation when soldering, as flux fumes are a respiratory hazard. Work on HVAC control boards, electrical panels, or other regulated systems should comply with applicable NEC or equipment-specific service requirements.