CircuitSeal™ Series Hermetic Circuit Board Seals

CircuitSeal addresses key challenges in designing underground electrical equipment and sealed devices by improving performance, reducing size, and cutting costs. It creates direct hermetic seals around circuit boards and cables, integrating passive components like filters and resistors. Ideal for reliable operation in pressurized, vacuum, and harsh environments.

CircuitSeal can play an important role in applications like semiconductor manufacturing, automotive systems, magnetic bearings, environmental chambers, and military systems.

CircuitSeal is a rather broad product line in terms of application use, which speaks to its flexibility. For example, a CircuitSeal pcb connector could be integrated into a LiDAR or camera assembly where the customer needs to ensure it is hermetically sealed to prevent moisture ingress over time. In military applications where an engineer is looking to reduce weight / payload, a hermetic connector assembly could create the interface between a flex circuit and existing harness. Automotive applications can require hermetics within sensor assemblies to survive direct media contact as well as submersion within a fluid such as transmission fluid.

Yes, Douglas Electrical can partner with you for both vacuum and pressurized applications. When contacting us, please share the operating pressures and differential pressures you expect. Additionally, operating temperature will be a critical factor in the design

Design flexibility is a key differentiator for epoxy-based solutions; standard electrical connections can be enhanced as a hermetic connection with minimal tooling and setup capability. Relying on standard, off-the-shelf designs allows design flexibility to stay fiscally responsible and maintain the ratings of the existing design. Smaller production volumes are traditionally easier and faster with epoxy-based designs, whereas glass-to-metal designs require setups and tooling.

For electronic encapsulation, epoxy can be applied directly to the flex circuit or wires and hermetically seal. Glass-t0-metal seals require a high temperature process to fire the pins to the metal housing. Thus, the assembly will need to be separately connected to the hermetic glass-to-metal seal.

To learn more about the differences between glass-to-metal and epoxy seals, download our whitepaper.  Types of Hermetic Seals

Douglas Electrical Components uses a variety of proprietary steps to ensure the right potting compound, process, and materials are used to ensure encapsulation of the electrical connection. CircuitSeal can reduce the number of electrical connection points, decrease assembly weight, and increase reliability by encapsulating the most critical electronics, from missiles to sensors to batteries.

Yes, a connectorized flex circuit assembly is a simple way to create a high density hermetic assembly. Douglas can integrate rigid and flexible circuits into a hermetic package. The flex or rigid circuit can directly interface with the connector receptacle or to an interface circuit board.

Yes, CircuitSeal can add hermetic, moisture-tight sealing to a rigid circuit board. This includes existing circuit board designs that need enhanced protection in harsh environments or new product development.

No, we do not sell the epoxy; we manufacture the pre-potted assembly. Aside from the proprietary nature to our epoxy, we also employ special techniques and processes to ensure the hermetic seal. This comes with decades of product and application experience in various areas. Our team is easy to partner with, thus working through the design process and creating a “design for manufacturing” assembly that meets your hermetic and liquid-tight sealing needs at virtually any electrical connection.