21039-0407

Series:	Premo-Flex™ 21039
Part Status:	Obsolete
Lead Free Status / RoHS Status:	--
Cable Type:	FFC, FPC
Moisture Sensitivity Level (MSL):	--
Number of Conductors:	24
Pitch:	0.039" (1.00mm)
Length:	5.000" (127.00mm)
Length - Exposed Ends:	0.157" (4.00mm)
Termination Style:	Top on Both Sides, Backers on Both Sides

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Flat flex cables (FFCs) and ribbon jumpers (RJs) are electrical signal connecting devices used to increase signal integrity and reduce EMI/RFI. These cables provide a low capacitance, low inductance signal path between two electronic devices, and are often used in low voltage, high frequency circuits. The 21039-0407 is a particular type of flat flex cable, with 2.54 mm pitch and 4 conductor wires, ideal for use in consumer electronics, instrumentation, and communication applications.

Flat flex cables are composed of a flexible plastic strip, the tape, that is coated with a layer of metal. This metal layer can vary in width and thickness, depending on the requirements of the application. This metal layer is where the conductors are attached, which are typically copper or aluminum coated. This metal layer also provides protection from RF signals, making flat flex cables ideal for use in communications and medical applications. The wires are soldered into the metal layer and connected to each other using a terminal connector. The metal layer may also incorporate additional features such as strain reliefs and shielding material.

Ribbon jumpers are similar to flat flex cables, but rather than a single metal coating they are composed of multiple wires in a flat array. The wires are soldered onto a metal terminal connector, typically known as an RJ (ribbon jumper), in order to make electrical connections between two devices. The wires in a ribbon jumper typically range in size from 2 to 40 AWG, and are usually either copper or aluminum-coated materials. The wires are then covered with an insulation material that provides added protection from EMI/RFI signals.

The 21039-0407 is a particular type of flat flex cable, with 2.54mm pitch and 4 conductor wires. This cable is ideal for use in consumer electronics, instrumentation, and communication applications. It is designed to provide higher signal integrity and improved EMI/RFI protection than standard ribbon jumpers. This cable features a double-layer metal shield, which helps reduce EMI/RFI signals and improves EMI/RFI immunity. It also has a low capacitance, low inductance design, which helps improve high frequency signal performance and reduce crosstalk. Additionally, the 21039-0407 is compliant with multiple communication protocols, such as S/FTP, ARINC-429, ARINC-600, and SAE AS6172, making it a great choice for applications requiring a high degree of reliability.

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