51939-618LF Connectors, Interconnects

Series:	PwrBlade®
Packaging:	Tray
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Connector Usage:	--
Connector Type:	Header, Male Pins and Blades
Connector Style:	Blade Power
Number of Positions:	35
Number of Positions Loaded:	All
Pitch:	0.100" (2.54mm)
Number of Rows:	4
Number of Columns:	--
Mounting Type:	Board Edge, Through Hole, Right Angle
Termination:	Solder
Contact Layout, Typical:	24 Signal, 11 Power
Features:	Mating Guide
Contact Finish:	Gold or Gold, GXT™
Contact Finish Thickness:	30.0µin (0.76µm)
Color:	Black
Current Rating:	--
Material Flammability Rating:	UL94 V-0
Operating Temperature:	-20°C ~ 105°C
Voltage Rating:	--

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Introduction
51939-618LF connectors are specialized backplane connectors that are designed and manufactured to meet the demanding needs of the high speed data transfer application. This connector offers a high-density pin system that allows taking up minimal amount of space on printed circuit boards, while providing maximum current and signal transfer capabilities. Additionally, the design allows for increased EMI shielding between adjacent high-speed signal lines and various modular interfaces, as well as enabling the use of a variety of contact arrangements.
Application Fields
51939-618LF connectors can be used a variety of applications, including telecommunications, industrial automation, and military/aerospace applications. This connector\'s high density design is the perfect solution for applications where board space is limited, yet maximum performance is desired. Additionally, its resistance to shocks and vibrations makes it an ideal backplane connector for use in military/aerospace applications with harsh environmental conditions. Regarding telecommunications, the 51939-618LF connector offers increased EMI shielding with its design, which is essential in order to reduce crosstalk between the adjacent high-speed signal lines and ensures superior performance.
Working Principle
The 51939-618LF connector utilizes a variety of contact arrangements, ranging from standard dual port connectors to triple and quad port connectors, as well as featuring overcurrent protection and low outgassing. The dual-port design contains a contact actuation bar, which provides a spring-like force to retain and align the contacts into the desired configuration. Also, the contact actuation bar enables a blind-mate configuration, which further simplifies the assembly process in the overall system. In addition, the triple and quad port options provide EMI shielding with special design features and materials choice. The use of non-metallic construction and a partial shielding layer ensure that the contact arms surrounding the side-walls can efficiently block the radiation from the signal lines. Furthermore, the complete shielding layer shields the contact arms from stray radiation, guaranteeing reliable signal transfer and preventing signal distortion due to EMI.
Conclusion
In conclusion, the 51939-618LF backplane connector is an ideal choice for a variety of applications due to its small form factor, high-speed signal transfer capability, increased EMI shielding, and reliable operation in harsh environments. Its advanced design also provides for simpler assembly and complete shielding for true EMI protection. With the advantages that this backplane connector offers, the 51939-618LF is the perfect solution for applications where board space is extremely limited, as well as applications where a reliable connection is essential.

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