What is another name for a ribbon cable?

What is another name for a ribbon cable?

If you’ve ever opened a desktop computer, peered inside a printer, or tinkered with an old IDE hard drive, you’ve seen it: a wide, flat strip of multicolored wires running between circuit boards like a tiny rainbow highway. Most people call this a ribbon cable. But depending on whom you ask, you might hear a different name entirely—and that name often reveals something about the cable’s design, its history, or the industry using it.

The most common alternative name is **flat cable**. This is the term engineers and manufacturers frequently use in datasheets and product catalogs. It’s purely descriptive: the cable is flat, with its conductors laid side by side in a single plane instead of bundled into a round jacket. When someone says “flat cable,” they’re emphasizing the geometry that makes ribbon cables so useful in tight spaces. A flat cable can snake under a keyboard, fold around a hinge, or stack neatly inside a rack where a round cable would create a bulky mess.

You’ll also hear **flat ribbon cable**, which combines both descriptors. This is the full, formal name you’ll see on spools and in supplier inventories. The word “ribbon” captures something the term “flat” doesn’t: flexibility. A ribbon cable bends easily, fans out neatly, and follows a path almost like fabric. The insulation is usually a flexible PVC or Teflon, and the conductors are bonded edge-to-edge so the whole assembly moves as one unit.

In some contexts, people call it a **planar cable**. This term is more common in aerospace, medical, and high-reliability engineering, where precise language matters. “Planar” refers to the cable’s two-dimensional layout. Unlike a round cable, which has a radial cross-section, a planar cable spreads its conductors across a flat plane. This geometry gives it predictable impedance and crosstalk characteristics, which is why engineers choose it for high-speed parallel data buses and delicate signal routing.

Another name you might encounter is **IDC cable**, though this is slightly misleading. IDC stands for Insulation-Displacement Connector, which is the type of connector often attached to a ribbon cable. The cable itself is still a ribbon cable, but because most ribbon cables in mass production are terminated with IDC connectors, the whole assembly sometimes gets called an “IDC cable.” You’ll see this especially in industrial automation and legacy computing, where technicians refer to the familiar gray connector with two rows of sharp metal teeth that press directly onto the flat conductor.

There’s also the more casual **rainbow cable**, a nickname born from the color coding. Many ribbon cables use a repeating sequence of colors—red, orange, yellow, green, blue, violet, and so on—to help assemblers identify individual conductors at a glance. The first wire is often red or has a red stripe, which serves as the pin-1 reference. That colorful stripe pattern is so iconic that “rainbow cable” immediately conjures the image of a retro computer interior.

In short, the ribbon cable has many names, but they all point to the same clever piece of engineering. Whether you call it a flat cable, flat ribbon cable, planar cable, IDC cable, or rainbow cable, you’re describing a flexible, space-saving interconnect that has quietly held the electronics world together for decades. The next time you spot one, you’ll know it by whatever name fits the room—and you’ll understand exactly why it earned so many.