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Flat flex connectors, or FFC and FPC, are specialized electrical connectors commonly used in low-torque, low-force applications such as those in flexible printed circuits (FPCs) and cable assemblies. As their name implies, they utilize a flat contact system that is highly reliable and uniform. While this technology has existed in some form for almost 50 years, recent breakthroughs in design and materials have unlocked a number of new application possibilities.

FFC/FPC connectors are composed of individual flat stainless steel pins and barrels that can be connected in a variety of ways. Pins can be placed side by side, staggered, or connected in a way that allows the connector to be bent in one or multiple directions. The pins are then held in place by molded plastic housing that provides physical protection, keeps the pins from shorting out and ensures a reliable connection. Depending on the application, the housing can also provide electrical insulation. Most FFC/FPCs are equipped with one or more stiffeners to provide additional mechanical strength.

The flat contact surfaces of FFC/FPCs create reliable electrical connections in high-vibration environments and when exposed to extreme temperatures. This makes them well-suited for applications such as battery packs, electric motors, and aircraft connectors, as well as industrial and consumer electronics. FFC/FPCs are also widely used in medical applications such as infusion pumps, medical imaging equipment, and defibrillators.

The enhanced design flexibility and superior performance of FFC/FPC connectors make them a preferred method of interconnection in a number of other industries, including automotive, telecommunications, and data storage. In these applications, FFC/FPC connectors provide a wide range of options and benefits, including:

• High-density configurations that save precious board space
• Increased signal integrity and data security
• Minimized crosstalk
• Reduced weight and component count
• Improved circuit operation
• Lower maintenance costs due to improved reliability

The working principles of FFC/FPC connectors are based on a flexible flat conductor that is sandwiched between the upper and lower lands of the contact pins. This construction allows the contact to bend without fracturing the conductor. When the molded plastic housing is snapped into place, the pins are firmly locked together, creating a durable connection that can withstand extreme environmental conditions.

In order to ensure a reliable connection, FFC/FPC connectors must be properly designed for the application. This involves selecting the right contact material, connector size, and contact arrangement for the cable or printed circuit board. Additional design considerations include contact insertion force, temperature range, and operating environment.

FFC/FPC connectors have a wide range of applications and are found in virtually every electrical device. They are particularly well-suited for applications requiring high-density connections, improved signal integrity, and superior durability. FFC/FPC connectors are also a great choice for applications requiring the highest levels of electrical reliability and performance.

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