Mixing Gold and Tin Contacts

In electronics, it’s often debated whether to use gold or tin as contact materials when developing a product. The debate between the use of gold and the use of tin continues because both materials provide their own unique advantages and disadvantages. That is, each can be helpful in different situations.

To help you make the best decision for your next project, here’s a look at when to use gold connectors, when to use tin contacts and when to consider mixing gold and tin contacts.

When to Use Gold Plating for Electrical Contacts

The price of gold can be incredibly volatile, which influences its viability as a connector or contact. As the price of gold rises, it’s common to see the use of lower-quality gold to keep budgets in line. In general, using gold connectors means you get greater durability than with tin, more cycles and higher conductivity.

That said, the use of gold as a contact or connector can create unique challenges. Not only is the price of gold volatile, which can lead to varying levels of quality, but gold is also difficult to solder during joining applications. In general, it’s best to use gold when conductivity and durability requirements are high and when you want more cycles. Also, applications that do not require soldering lend themselves well to the use of gold.

When to Use Tin for Electrical Contacts

Tin is easily the most economical material to use when developing contacts and connectors. Tin is a weaker material to use as well, which means products and materials developed using tin contacts and connectors will be less durable and more likely to break over time.

But the lack of durability isn’t an issue with all projects. Tin is an incredibly useful material to use on budget-conscious projects that can accept lower cycle rates and that demand less durability due to low expected contact force. Tin is also much better when soldering, so tin is often chosen for projects that require joining.

The Benefits of Mixing Gold and Tin for Electrical Contacts

There’s another option to consider: mixing gold and tin contacts. You don’t have to choose purely gold connectors or tin contacts. Instead, you can be selective on where and when to use each material, playing off of the advantages and benefits for each.

For example, insert gold connectors in places that need to withstand greater contact force or that require higher conductivity. Then, opt for tin contacts in places where soldering will be needed, or in places that will not withstand great contact force — allowing you to reduce the overall cost of a given project.

Get Plating From SPC

At SPC, we provide outstanding tin and gold plating services, using the right materials for delivering the best long-term results. We can provide expert guidance as you choose between gold connectors, tin contacts and other materials, or as you consider mixing gold and tin contacts. We bring a wealth of experience and knowledge to our work, as well as a deep commitment to exceeding our clients’ expectations.

Contact us today to learn more about gold connectors, tin contacts and the possibility of mixing gold and tin contacts.