D38999/26JJ4SA

Series:	*
Part Status:	Active

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Introduction
D38999/26JJ4SA, also known as MIL-DTL-38999 Series III Shell, is a circular, bayonet coupling electrical connector manufactured by Anderson Power Products. It is designed for use primarily in military, aerospace and harsh-environment applications where multipin, high-speed signal transfers are critical.
Application Area
The D38999/26JJ4SA is used in many different applications, ranging from automotive and industrial applications to aerospace and military applications. It is designed to be highly reliable and provide a wide range of reliable data transmission capabilities. It is often used in applications where large numbers of pins are required or the environment is particularly harsh or hostile.
Features
The features of the D38999/26JJ4SA are superior to those of other circular connectors. It has a wider temperature range withstanding temperatures from -55°C to +125°C, better chemical resistance as it can be exposed to intense temperatures without danger of deformation or damage, and a high electromagnetic interference (EMI) shielding capability due to its zinc die-cast construction and nickel barrier layers.
Variants
The D38999/26JJ4SA comes in several versions or variants. These variants are differentiated by the number of pins, contacts and shells, and the contact types available. The variants range from 8 contacts to 64 contacts in various shell sizes. The contact types range from crimp-style crimp contacts, PCB-style contacts and solder-style contacts suitable for through-hole and surface-mount applications. The connector also has straight through, 4-degree offset and 8-degree offset bodies to accommodate the various requirements of the application.
Optional Accessories
Apart from the basic connector, optional accessories such as pull-tabs, bezels, caps, cleaning plugs, grommets and backshells extend the useful flexibility of the connector. The pull-tabs facilitate attaching and removing the connector and the bezels give a neat finished appearance. The cleaning plugs limit dirt ingress and the grommets provide strain relief. The backshells provide superior shielding as well as strain relief and electrical grounding.
Working Principle
The basic operating principle of D38999/26JJ4SA is as follows: a shell containing contacts is inserted into another. A locking nut is then tightened to ensure a good connection. The contacts are then engaged. Once the contacts are engaged, power or data is transmitted through them. The locking nut ensures the contacts are held in place and provides a reliable and secure connection. This process is repeated if and when additional contacts are needed.
Conclusion
The D38999/26JJ4SA is a highly reliable and versatile connector system tailored to applications in harsh and hostile environments. It offers good performance capabilities, provides high levels of EMI shielding and supports a range of contact types. It also provides designers with a variety of optional accessories to add additional features to the connector. Its superior features make it an ideal choice for applications where reliable performance is required.

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