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
Blue gradient logo displaying the word "Bi" followed by a plus sign.

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

40 to +85°C
170°C

Related Applications

The Bi+ alloy is suitable for a number of applications. Contact Indium Corporation Technical Support for more information.

Low-Temperature Soldering

Low-Temperature Soldering

Transform your operations with our low-temp soldering

Microchips on a printed circuit board

PCB Assembly

Proven and cutting-edge materials for PCB assembly

Related Markets

Bi+ delivers excellent low-temperature performance compared to traditional Bismuth containing alloys and can be used in various markets.

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!

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