What an HDMI Cable Looks Like: Connectors and Pin Counts
A picture of a HDMI cable usually shows a black round cord with a wide, slightly trapezoidal plug at each end, a metal shell, and a molded strain relief. That is the Type A connector, the one on televisions, monitors, consoles, and most laptops. The details that actually identify a cable are easy to miss in a product photo: the pin count inside the shell, the shape of the plug, and the version marking printed on the jacket. This guide explains what each visual feature tells you.
Quick Answer
A standard HDMI cable has a Type A plug about 14 mm wide with 19 pins in two rows, a keyed trapezoid shell, and a molded boot. Mini (Type C) and micro (Type D) versions keep the same 19 pins in smaller shells, while the obsolete Type B uses 29 pins and no longer appears in new products.
| HDMI type | Shape | Pins | Typical use |
|---|---|---|---|
| Type A (standard) | Wide flat plug | 19 | PC, console, TV |
| Type C (mini) | Smaller trapezoid | 19 | Cameras, drones |
| Type D (micro) | Tiny plug | 19 | Action cameras, phones |
| Type B (dual link) | Double width | 29 | Obsolete, 4K at 60 Hz era |
What a Standard HDMI Cable Looks Like
Start with the plug shape. Type A measures roughly 14 mm across the metal shell, with the top corners chamfered so the connector only enters one way. Inside the shell sit 19 pins arranged in two staggered rows, with the upper row offset from the lower one to keep the pitch tight. A good photo shows the pin field clearly; a bad one hides it behind a plastic cap.
The cable body itself is usually round and 6 to 8 mm thick for a passive 1 to 2 m cord, then grows with length and gauge. Long runs above 5 m often use thicker conductors or active electronics, and the jacket becomes noticeably stiffer.
Reading the markings on the jacket
Printed text along the cable usually lists the version, the gauge, and sometimes the maximum data rate. A marking of High Speed with Ethernet points to HDMI 1.4 era bandwidth, while Ultra High Speed indicates the 48 Gbps class used for 8K. These labels describe capability, not the physical plug, which stays the same.
Mini and Micro: Same Pins, Smaller Shell
Type C, the mini connector, is about two thirds the width of Type A and appears on cameras, drones, and older tablets. Type D, the micro connector, is smaller still and common on action cameras. Both keep 19 pins, so an adapter that changes only the shell shape passes the signal through without any conversion.
This is why a mini HDMI to HDMI adapter needs no power: nothing is being converted, only re-routed. The fragile part is the plug on the device side, which is why short adapter tails with a reinforced neck survive field use better than rigid blocks.
Type B and the Connectors You Will Not Find
Type B was defined with 29 pins to carry a second data link, and it never reached consumer products in volume. It is wider than Type A, was tied to early high resolution displays, and has been effectively replaced by the higher clock rates of later versions. If a listing shows a double width HDMI plug, it is almost certainly a render or a very old industrial part.
The other thing a photo cannot show is certification. Two cables can look identical and behave differently at 4K, because bandwidth depends on conductor gauge, shielding, and connector quality rather than on the outside appearance.
Matching the picture to the port
Measure the port, not the cable. A Type A port is about 15 mm wide, a Type C port about 10 mm, and a Type D port under 7 mm. If the plug in the picture is wider than the port on the device, the cable is the wrong type regardless of what the listing says.
Real-World Applications
- A buyer compares supplier photos for a 2 m TV cable and asks for a close up of the pin field to confirm 19 pins and a proper strain relief.
- A drone pilot keeps a short mini HDMI to HDMI adapter in the case because the camera port is Type C while the field monitor is Type A.
- A school replaces projector cables and checks the jacket marking for Ultra High Speed before buying, since the rooms run 4K at 60 Hz.
- A repair shop identifies an old industrial display cable as Type B from its double width shell and sources a replacement adapter instead of a new panel.
Related Guides
For the full product range, browse our productlist. For a deeper dive, read 20 foot hdmi cable, and for the next step, see macbook pro hdmi dongle.
FAQ
How many pins does a standard HDMI cable have?
Nineteen pins, arranged in two rows inside the Type A shell. Type C mini and Type D micro connectors also use 19 pins; only the obsolete Type B used 29.
How can I tell HDMI 1.4 from 2.0 by looking?
You cannot tell from the plug, because the connector is identical. Look at the jacket marking or the datasheet: High Speed class belongs to the 1.4 era, while Premium or Ultra High Speed markings indicate newer, higher bandwidth cables.
What does a mini HDMI connector look like?
A narrower trapezoid, about two thirds the width of the standard plug, with the same 19 pin field inside. It appears on cameras, drones, and some older tablets.
Why is my HDMI cable thicker than the one in the photo?
Longer cables use heavier conductors and more shielding to hold the signal, so a 10 m cord looks and feels much thicker than a 1 m patch cable even though both end in the same plug.
Need a custom length, gauge or connector build? Contact our cable team with your spec and quantity.