TO-46 Package
The TO-46 package, a type of ‘metal can’ (also known as ‘metal header’) package, is designed for housing semiconductor devices like transistors and integrated circuits with a low number of leads. Hermetically sealed, the TO-46 package offers protection against environmental factors such as moisture and contaminants. This makes it ideal for high-reliability applications in demanding environments. Known for its robust construction and excellent heat dissipation properties, the TO-46 is widely used in high-performance applications where durability is crucial.
The TO-46 package is primarily composed of metal, featuring a metal header where the microchip is mounted on the die pad. The package is then sealed with a metal cap using high-current welding. Compared to the TO-52, the TO-46 is slightly smaller due to its flatter cap design, yet it maintains excellent protective properties and thermal management.
At Electronic Products Inc. (EPI), we leverage over 60 years of experience to provide both standard and custom-engineered TO-46 packages that meet JEDEC-compliant standards. Our expertise includes high-quality materials, such as CTE-matched ASTM-F15 Alloy (Kovar) for matched seals and ASTM-F30 (Alloy 52) for compression seals. We also offer ceramic-based designs for more complex optoelectronic applications, ensuring enhanced performance and reliability.
EPI offers a variety of customization options for TO-46 packages, including different lead configurations, plating materials like nickel, copper, silver, and gold, and various pin lengths. As an ISO 9001:2015 certified US manufacturer, we ensure that all our TO-46 packages are RoHS and REACH compliant, meeting global environmental and safety standards.
Our commitment to quality and customer satisfaction ensures that our TO-46 packages are tailored to meet the most demanding requirements. EPI provides a reliable, high-performance solution for your applications, backed by our extensive experience and dedication to excellence.
Image Library
TO-46 - Hermetic Packages - Left Side View
TO-46 - Hermetic Packages - Right Side View
TO-46 - Hermetic Packages - Top Side View
TO-46 - Hermetic Packages - Side View
FAQs
What are the dimensions of the TO-46 package?
The TO-46 package typically has a diameter of 5.6 mm and a height of approximately 4.6 mm. However, these dimensions can vary based on specific customizations and design requirements.
What materials are used in the construction of the TO-46 package?
The TO-46 package is primarily constructed from metals such as ASTM-F15 Alloy (Kovar) for matched seals and ASTM-F30 (Alloy 52) for compression seals. These materials provide excellent thermal and mechanical properties, ensuring durability and reliability.
What are the lead configurations available for the TO-46 package?
The TO-46 package commonly comes with three leads, but it can be customized to include different lead configurations based on the specific requirements of the application.
How does the hermetic sealing process work for TO-46 packages?
Hermetic sealing for TO-46 packages involves high-current welding to attach the metal cap to the TO-46 header, creating an airtight seal that protects the internal components from moisture and contaminants.
What are the typical applications of the TO-46 package?
The TO-46 package is commonly used in high-reliability applications, including industrial sensors, medical devices, communication equipment, and military and aerospace applications, where durability and performance are critical.