What Is Plated Wire?

What is plated wire?
What are the key features of plated wire?
What kind of plated wire does MWS provide?
A Focus on Gold Plated Wire
What are the Key Selection Factors for Choosing a wire plating?
What are the common applications for plated wire?
Plated wire by the Numbers.

What is plated wire?

Plated wire is produced by applying a metallic coating—such as gold, silver, nickel, or tin—onto a base conductor like copper, brass, or stainless steel. This process improves the wire’s surface properties without compromising the core’s structural or conductive qualities. After plating, the wire is often film-insulated to protect against environmental degradation, especially in high-temperature or chemically aggressive environments. Plated wire is engineered to minimize oxidation, resist chemical migration, and maintain long-term reliability under a variety of different conditions.

What are the key features of plated wire?

Plated wire offers a range of performance enhancements over bare conductors:

• Enhanced conductivity: Silver plating provides superior electrical and thermal conductivity, critical for signal integrity in sensitive electronics.
• Corrosion resistance: Nickel and tin plating form protective oxide layers that resist rust and chemical attack, extending service life.
• Oxidation prevention: Gold does not oxidize, ensuring a clean, conductive surface for reliable electrical connections, especially in low-voltage applications.
• Improved solderability: Tin, tin/lead (solderplated), and silver platings offer excellent wetting and bonding characteristics during soldering processes.
• High-temperature stability: Nickel and gold-plated wires can operate at elevated temperatures without degrading, preventing conductor oxidation and chemical migration.
• Wear resistance: Hard gold plating is used in high-friction environments to resist abrasion and maintain contact integrity

What kind of plated wire does MWS Provide?

MWS offers a comprehensive range of plated wire solutions, meeting all relevant industry standards such as QQ-W-343, AA59551, and Mil Std 1276. Building your own custom plated wire is simple. First choose your base conductor:

Typical Base Connectors Available in sizes from 14 to 52 AWG
Copper Brass Phosphor Bronze Beryllium Copper	Nickel Nickel Alloys Copper Clad Steel Constantan	Dumet Kovar Monel Stainless Steel Wire

Next choose your plating:

MWS also supports custom plating thicknesses ranging from 10 to 750 microinches tailored to application-specific needs and specifications desired.

Finally, choose your wire shape and finishing options.  Plated wires can be shaped, bondable, insulated, and available in twisted pair or Multifilar® constructions.

A Focus on Gold Plated Wire

Gold plated wire is a specialty product offered by MWS for high-reliability applications where signal integrity and connection stability are paramount. Gold does not form an oxide layer, ensuring a smooth, conductive mating surface that resists pitting and corrosion.

Two primary types are available:

• Hard gold (99.7% cobalt-hardened): Used in connectors and switches subject to mechanical wear, offering durability and resistance to friction.
• Soft gold (99.9% pure): Preferred for wire bonding, soldering, and high-temperature environments where maximum purity and conductivity are required.

Gold plating is especially critical in microelectronics, aerospace systems, and medical devices, where even minor conductivity losses due to oxidation can lead to system failure

What are the Key Selection Factors for Choosing a wire plating?

Selecting the right plating involves evaluating several factors:

• Operating environment: For high-temperature or corrosive settings, nickel or gold plating is ideal; for general use, tin or silver may suffice.
• Electrical requirements: Silver offers the highest conductivity, while gold ensures stable low-voltage performance.
• Mechanical demands: Hard gold or nickel plating enhances wear resistance in moving contacts or spring applications.
• Solderability needs: Tin and tin/lead platings provide superior solder wetting, especially on difficult-to-solder substrates.
• Aerospace Performance: Tin/lead solderplated prevents “tin whiskers” in aerospace applications, mitigating short-circuit risks.

What are the common applications for plated wire?

Plated wire is used across a wide variety of industries:

• Electronics and aerospace: Gold and silver plated wires ensure signal stability and reliability in avionics, satellites, and communication systems.
• Medical devices: Gold and platinum wires are used in implants and sensors due to biocompatibility and corrosion resistance.
• Automotive and transportation: Tin and tin/lead plated wires are used in grounding, hook-ups, and bus wiring.
• Defense and industrial systems: Nickel and silver plated wires serve in high-temperature sensors, connectors, and power transmission.
• Wire bonding: Gold and silver plated wires are essential in semiconductor packaging for reliable interconnects

Plated wire by the Numbers

Below is a sample of different plating thicknesses on copper wire.

Values are representative; verify final coating class/weight with the quote and certs.

Where to learn more about plated wire.

More information about precious metals can be found on our Plated Wire product page.  If you know what you need already or have a question for our sales team, you can contact us directly.