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The first three categories are This FAQ starts with a brief review of basic plating system concepts, then looks at the performance of noble metals, passive metals, and alloys, and closes with a glance at the potential benefits of dispersions." /> <link rel="canonical" href="https://www.connectortips.com/what-plating-options-are-available-for-high-power-connectors/" /> <meta name="twitter:card" content="summary_large_image" /> <meta name="twitter:title" content="What plating options are available for high-power connectors?" /> <meta name="twitter:description" content="Plating options are numerous and tend to fall into four categories: noble metals, passive metals, alloys, and dispersions. The first three categories are This FAQ starts with a brief review of basic plating system concepts, then looks at the performance of noble metals, passive metals, and alloys, and closes with a glance at the potential benefits of dispersions." /> <meta name="twitter:image" content="https://www.connectortips.com/wp-content/uploads/2023/10/What-plating-options-are-available-for-high-power-connectors-Figure-2-1.jpg" /> <meta name="twitter:creator" content="@ConnectorTips" /> <meta name="twitter:site" content="@ConnectorTips" /> <meta name="twitter:label1" content="Written by" /> <meta name="twitter:data1" content="Jeff Shepard" /> <meta name="twitter:label2" content="Est. reading time" /> <meta name="twitter:data2" content="4 minutes" /> <script type="application/ld+json" class="yoast-schema-graph">{"@context":"https://schema.org","@graph":[{"@type":"WebPage","@id":"https://www.connectortips.com/what-plating-options-are-available-for-high-power-connectors/","url":"https://www.connectortips.com/what-plating-options-are-available-for-high-power-connectors/","name":"What plating options are available for high-power connectors?","isPartOf":{"@id":"https://www.connectortips.com/#website"},"primaryImageOfPage":{"@id":"https://www.connectortips.com/what-plating-options-are-available-for-high-power-connectors/#primaryimage"},"image":{"@id":"https://www.connectortips.com/what-plating-options-are-available-for-high-power-connectors/#primaryimage"},"thumbnailUrl":"https://www.connectortips.com/wp-content/uploads/2023/10/What-plating-options-are-available-for-high-power-connectors-Figure-2-1.jpg","datePublished":"2023-10-18T09:38:41+00:00","dateModified":"2024-10-28T17:03:02+00:00","author":{"@id":"https://www.connectortips.com/#/schema/person/64e2cfc37c20016364f2de63f22958e7"},"description":"Plating options are numerous and tend to fall into four categories: noble metals, passive metals, alloys, and dispersions. 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class="content" id="genesis-content"><article class="post-7616 post type-post status-publish format-standard has-post-thumbnail category-faq category-featured tag-connectors tag-faq entry" aria-label="What plating options are available for high-power connectors?"><header class="entry-header"><h1 class="entry-title">What plating options are available for high-power connectors?</h1> <p class="entry-meta"><time class="entry-time">October 18, 2023</time> By <span class="entry-author"><a href="https://www.connectortips.com/author/jeff-shepard/" class="entry-author-link" rel="author"><span class="entry-author-name">Jeff Shepard</span></a></span> <span class="entry-comments-link"><a href="https://www.connectortips.com/what-plating-options-are-available-for-high-power-connectors/#respond">Leave a Comment</a></span> </p></header><div class="entry-content"><div class="addtoany_share_save_container addtoany_content addtoany_content_top"><div class="a2a_kit a2a_kit_size_16 addtoany_list" data-a2a-url="https://www.connectortips.com/what-plating-options-are-available-for-high-power-connectors/" data-a2a-title="What plating options are available for high-power connectors?"><a class="a2a_button_facebook" href="https://www.addtoany.com/add_to/facebook?linkurl=https%3A%2F%2Fwww.connectortips.com%2Fwhat-plating-options-are-available-for-high-power-connectors%2F&linkname=What%20plating%20options%20are%20available%20for%20high-power%20connectors%3F" title="Facebook" rel="nofollow noopener" target="_blank"></a><a class="a2a_button_x" href="https://www.addtoany.com/add_to/x?linkurl=https%3A%2F%2Fwww.connectortips.com%2Fwhat-plating-options-are-available-for-high-power-connectors%2F&linkname=What%20plating%20options%20are%20available%20for%20high-power%20connectors%3F" title="X" rel="nofollow noopener" target="_blank"></a><a class="a2a_button_linkedin" href="https://www.addtoany.com/add_to/linkedin?linkurl=https%3A%2F%2Fwww.connectortips.com%2Fwhat-plating-options-are-available-for-high-power-connectors%2F&linkname=What%20plating%20options%20are%20available%20for%20high-power%20connectors%3F" title="LinkedIn" rel="nofollow noopener" target="_blank"></a><a class="a2a_dd addtoany_share_save addtoany_share" href="https://www.addtoany.com/share"></a></div></div><p>Plating options are numerous and tend to fall into four categories: noble metals, passive metals, alloys, and dispersions. The first three categories are well established, while dispersions are just beginning to appear in response to the need for high-power connectivity in electric vehicle (EV) charging and similar applications.</p> <p>This tutorial starts with a brief review of basic plating system concepts, then looks at the performance of noble metals, passive metals, and alloys, and closes with a glance at the potential benefits of dispersions.</p> <p>Plating systems are often multilayer structures where the top layer can be a relatively thin plating. Passive metal surfaces like tin are often found in consumer products. Industrial, military, medical, and other high-performance applications usually turn to noble metals. Noble metals are often used as alloys. For example, pure gold is too soft for many applications, and gold alloyed with cobalt, nickel, or iron, called ‘hard gold,’ is used to provide more durability (<strong>Figure 1</strong>). Other noble metals like silver can also be used as alloys for improved hardness.</p> <figure id="attachment_7617" aria-describedby="caption-attachment-7617" style="width: 1024px" class="wp-caption aligncenter"><a href="https://www.connectortips.com/wp-content/uploads/2023/10/What-plating-options-are-available-for-high-power-connectors-Figure-1.jpg"><img decoding="async" class="size-large wp-image-7617" src="https://www.connectortips.com/wp-content/uploads/2023/10/What-plating-options-are-available-for-high-power-connectors-Figure-1-1024x432.jpg" alt="" width="1024" height="432" srcset="https://www.connectortips.com/wp-content/uploads/2023/10/What-plating-options-are-available-for-high-power-connectors-Figure-1-1024x432.jpg 1024w, https://www.connectortips.com/wp-content/uploads/2023/10/What-plating-options-are-available-for-high-power-connectors-Figure-1-300x127.jpg 300w, https://www.connectortips.com/wp-content/uploads/2023/10/What-plating-options-are-available-for-high-power-connectors-Figure-1-768x324.jpg 768w, https://www.connectortips.com/wp-content/uploads/2023/10/What-plating-options-are-available-for-high-power-connectors-Figure-1-1536x648.jpg 1536w, https://www.connectortips.com/wp-content/uploads/2023/10/What-plating-options-are-available-for-high-power-connectors-Figure-1.jpg 2047w" sizes="(max-width: 1024px) 100vw, 1024px" /></a><figcaption id="caption-attachment-7617" class="wp-caption-text"><br /><em>Figure 1. Plating systems consist of multiple layers of different materials (Image: </em><a href="https://www.harting.com/sites/default/files/2019-03/Contact-plating-material-options-for-electronic-connectors_0.pdf" target="_blank" rel="noopener"><em>Harting</em></a><em>).</em></figcaption></figure> <p><strong>Noble metals<br /> </strong>Gold is very conductive, even at low voltages. Compared to other options, it has superior resistance to oxidation and corrosion. Thus, it’s well-suited for use in environments with high humidity or frequent thermal cycling.</p> <p>Silver performs well in high-power applications. Its lower cost than gold makes it a good choice for larger, high-current contacts.</p> <p>Palladium is highly electrical and thermally conductive and resistant to corrosion. It is also harder than gold or silver, making it a good choice for applications that demand more durability.</p> <p>Rhodium is harder than palladium, and it’s resistant to corrosion and acids. It’s well-suited for applications that need good wear resistance and high hardness.</p> <p><strong>Passive metals<br /> </strong>Tin is non-toxic, making it suitable for some medical applications. It’s low-cost and suited applications that require a low number of mating cycles.</p> <p>Nickel is very hard, durable, and corrosion-resistant. Its durability and high electrical conductivity make it suitable for high-use applications.</p> <p>Copper has one of the highest electrical conductivities, but it needs a protective layer to prevent corrosion. It’s often used as a foundation for subsequent metal plating.</p> <p><strong>Metal alloys<br /> </strong>White bronze is a non-magnetic alloy of copper, tin, and zinc and is more conductive than nickel. It’s well-suited for many medical and RF connectors.</p> <p>Palladium nickel alloy is corrosion-resistant and has low contact resistance. It has good solderability and can handle a high number of mating cycles. Palladium nickel plating is often flashed with gold.</p> <p>Electroless nickel plating can be applied to conductive and non-conductive surfaces. Electroless nickel deposits are alloyed with up to 14% phosphorus. The higher the phosphorus content, the greater the corrosion resistance, but the hardness decreases.</p> <p>Nickel phosphorus alloys are highly resistant to wear and corrosion. They also have good solderability but lower conductivity than other alloys.</p> <p><strong>Silver graphite dispersion<br /> </strong>A silver-graphite dispersion has been developed for contacts in high-power applications like EV chargers. It combines the properties of fine and hard silver. The fine silver matrix provides high electrical conductivity, and the graphite increases abrasion resistance and supports high cycle lives. An even and random dispersion of the graphite particles is one key to the high durability (<strong>Figure 2</strong>).</p> <figure id="attachment_7618" aria-describedby="caption-attachment-7618" style="width: 1024px" class="wp-caption aligncenter"><a href="https://www.connectortips.com/wp-content/uploads/2023/10/What-plating-options-are-available-for-high-power-connectors-Figure-2.jpg"><img decoding="async" class="size-large wp-image-7618" src="https://www.connectortips.com/wp-content/uploads/2023/10/What-plating-options-are-available-for-high-power-connectors-Figure-2-1024x504.jpg" alt="" width="1024" height="504" srcset="https://www.connectortips.com/wp-content/uploads/2023/10/What-plating-options-are-available-for-high-power-connectors-Figure-2-1024x504.jpg 1024w, https://www.connectortips.com/wp-content/uploads/2023/10/What-plating-options-are-available-for-high-power-connectors-Figure-2-300x148.jpg 300w, https://www.connectortips.com/wp-content/uploads/2023/10/What-plating-options-are-available-for-high-power-connectors-Figure-2-768x378.jpg 768w, https://www.connectortips.com/wp-content/uploads/2023/10/What-plating-options-are-available-for-high-power-connectors-Figure-2-1536x756.jpg 1536w, https://www.connectortips.com/wp-content/uploads/2023/10/What-plating-options-are-available-for-high-power-connectors-Figure-2-2048x1008.jpg 2048w" sizes="(max-width: 1024px) 100vw, 1024px" /></a><figcaption id="caption-attachment-7618" class="wp-caption-text"><em>Figure 2. X-ray spectroscopy scan of the contact surface shows the uniform distribution of the graphite over the surface (Image: </em><a href="https://mds.umicore.com/en/electroplating/news-media/news/new-connector-plating-standard-for-plug-contacts-in-high-power-applications/" target="_blank" rel="noopener"><em>Umicore</em></a><em>).</em></figcaption></figure> <p><strong>Summary<br /> </strong>A wide array of plating options can support various levels of conductivity, environmental ruggedness, durability, and other application needs. The traditional choices between noble metals, passive metals, and various alloys are being extended with the development of graphite dispersion plating materials.</p> <p><strong>References<br /> </strong><a href="https://www.harting.com/sites/default/files/2019-03/Contact-plating-material-options-for-electronic-connectors_0.pdf" target="_blank" rel="noopener">Contact plating material options for electronic connectors</a>, Harting<strong><br /> </strong><a href="https://www.beadelectronics.com/blog/plating-for-electronic-connector-pins-and-contacts" target="_blank" rel="noopener">Plating for Electronic Connector Pins and Contacts</a>, Bead Electronics<strong><br /> </strong><a href="https://mds.umicore.com/en/electroplating/news-media/news/new-connector-plating-standard-for-plug-contacts-in-high-power-applications/" target="_blank" rel="noopener">Silver-graphite dispersion electrolyte contacts</a>, Umicore<strong><br /> </strong><a href="https://www.connectpositronic.com/en/2021/07/23/the-advantages-of-gold-plated-connectors/" target="_blank" rel="noopener">The Advantages of Gold Plating in Connectors</a>, Positronic</p> <div class="bawmrp"> <h3>You may also like:</h3> <ul> <li style="float:left;width:120px;height:auto;overflow:hidden;list-style:none;border-right: 1px solid #ccc;text-align:center;padding:0px 5px;" class="bawmrp_manual"><a href="https://www.connectortips.com/where-are-liquid-cooled-industrial-connectors-used/"><img loading="lazy" decoding="async" width="100" height="100" src="https://www.connectortips.com/wp-content/uploads/2023/10/Where-are-liquid-cooled-industrial-connectors-used-Figure-1-1-150x150.jpg" class="attachment-100x100 size-100x100 wp-post-image" alt="" /><br />Where are liquid-cooled industrial connectors used?</a></li> <li style="float:left;width:120px;height:auto;overflow:hidden;list-style:none;border-right: 1px solid #ccc;text-align:center;padding:0px 5px;" class="bawmrp_manual"><a 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