Lumafield used a powerful X-ray CT scanner to determine why Apple's Thunderbolt 4 Pro cable costs $129 while Amazon's USB-C cable is cheaper. Apple's expensive Thunderbolt 4 Pro cable has received a lot of attention since its debut in 2022. A previous teardown revealed exactly why this cable is so expensive due to its intricate engineering.
Teardown reports weren't enough, so today a company called Lumafield used its Neptune industrial X-ray CT scanner to take a closer look at Thunderbolt 4 Pro cables and some of the cheaper options on the market. As the teardown shows, this cable features an incredible level of engineering sophistication that no other cable can match.
Thunderbolt4Pro cables are rated for 100W power and 40Gbps data transfer speeds. CT scans show that Apple went all out to stockpile materials, using a 9-layer PCBA and utilizing all 24 pins for connections.
Compared to the AmazonBasics USB-C cable, which sells for about $10, it's an engineering masterpiece. , the AmazonBasics cable is rated at 60W and has a data transfer speed of only 480Mbps. It has 12 pins instead of 24, 8 of which were skipped to cut costs. This is a lower-gauge cable, so cheaper construction and engineering is necessary, but using it for comparison helps illustrate exactly why Apple's design cost more than ten times as much.
The other USB-C cables Lumafield reviewed had extremely poor construction and engineering, with one $5 option even lacking a PCBA entirely, instead having the connector directly attached to the wire.
On Lumafield's website you can view detailed CT scans and an interactive app for viewing the scan results:
https://www.lumafield.com/article/usb-c-cable-charger-head-to-head-comparison-apple-thunderbolt-amazon-basics
The $129 Thunderbolt 4 Pro cable is 1.8 meters long, which is the length offered by many competitors. Apple remains the only reputable vendor offering a 3-meter Thunderbolt 4 cable for $159.