LoW-Temperature Solder Pastes
Bi+ Solder Alloy
The patented Bi+ alloy, also known as Indalloy®303, is an innovative low-temperature solder developed by Indium Corporation to meet the challenges of modern electronics manufacturing. Featuring a unique doped bismuth composition, Bi+ delivers outstanding reliability and performance for sensitive components that demand precise thermal management. With enhanced thermal cycling capabilities and compatibility with Indium Corporation’s low-temperature flux technologies, Bi+ sets a new standard in the soldering industry.
Powered by Indium Corporation
- Temperature-Sensitive Components
- Enhanced Thermal Cycling Reliability
- Lower Cost of Ownership

Product Overview
Reduced Thermal Warpage
Minimizes warpage in multilayer boards and miniaturized components, reducing defect rates during assembly.
Reduced Cost
Offers customers an affordable material and opportunity to reduce energy bills and oven maintenance investments.
Enhanced Thermal Cycling Reliability
Provides superior performance in thermal cycling, ensuring longevity and reliability of solder joints.
Enables Step Soldering
Allows for step soldering and other complex designs that require a solder alloy with lower reflow temperature.
Quick Facts
Related Applications
The Bi+ alloy is suitable for a number of applications. Contact Indium Corporation Technical Support for more information.
Related Markets
Bi+ delivers excellent low-temperature performance compared to traditional Bismuth containing alloys and can be used in various markets.
Expert Support for Reliable Results
Do you have technical questions or sales inquiries? Our dedicated team is here to help. “From One Engineer to Another®” isn’t just our motto—it’s our commitment to delivering exceptional service. We’re ready when you are. Let’s connect!

Looking for Safety Data Sheets?
Access everything you need — from technical specifications to application guidance — in one convenient location.

Your Success
is Our Goal
Optimize your processes with the latest materials, technology, and expert application support. It all starts by connecting with our team.