10Gtek 10G SFP+ DAC Cable - 10GBASE-CU Passive Direct Attach Copper Twinax SFP Cable for Cisco SFP-H10GB-CU0.3M, Meraki MA-CBL-TA-0.3M, Fortinet, Ubiquiti UniFi, D-Link, 0.3-Meter(1ft)

The 10Gtek 10G SFP+ DAC Cable (10GBASE-CU Passive Direct Attach Copper Twinax) is a rock-solid solution for short-range, high-speed connections between SFP+ ports in switches, servers, and NICs. It delivers exactly what you want from a DAC cable: consistent 10Gbps performance, ultra-low latency, and zero configuration hassle. Build quality is excellent. The twinax cable is thick, durable, and well-shielded, while the SFP+ connectors feel solid and securely latch into place. As a passive DAC, it requires no power, runs cool, and provides a clean, interference-free link—ideal for top-of-rack or switch-to-server connections where reliability matters. Installation is truly plug-and-play, with instant link-up and stable operation. It performs flawlessly for data center, home lab, and enterprise environments, eliminating the need for separate transceivers and fiber while keeping costs down. Overall, the 10Gtek DAC cable offers excellent compatibility, dependable performance, and great value.

Works great

Using for ha on my watchguard m470s.

Perfect. Plug and Play.... works great.

Great product. Great performance. Competitive pricing.

Works perfectly with my Grandstream switches and routers to connect them together. Don't have anything but Grandstream gear, so can't speak for compatibility with any other brands.

Edited: I had an issue using these cables (see below). After posted the review about them, I was contacted by the manufacturer, and offered a refund, as well as an apology and some suggestions for testing and/or returning the items. Customer service was great. It was suggested that I could use one cable at a time to see if the issue was the result of one cable or a combination of them. Customer service was so nice, I figured I'd go ahead and do the testing. Heck, I liked the short DAC cables, so if only one was bad, I'd prefer to just replace that. Well, after a bunch of testing, I could not reproduce the issue I was getting in the first place. I'm not sure if a change in my network made the issue go away, but I'm now using the three cables I bought, and they're working great. I am grateful that customer service was so polite and patient with me. Previous review: I had three of the 0.3m 10G DAC cables in my network. I had one connecting my UDM-Pro (router) to a USW-Pro-Aggregation switch, and two (in aggregation) connecting the USW-Pro-Aggregation to a USW-Enterprise-24-PoE switch. With these cables, the connection speed was incredibly inconsistent. Sometimes I'd get line speeds, but the upload speed from a device on the PoE switch to the internet (2gig symmetrical fiber) would regularly drop to as low as 35 Mbit/s. Took me forever to figure out what was causing it, but when I swapped out these three cables for Ubiquiti branded ones, problem solved. I only caught this issue because I setup a VM to monitor my internet speed by recording internet speedtest results every 15 minutes or so. I've had ISP problems in the past, so I do this out of habit.

Despite what the description says, these do not work with even relatively modern Cisco devices like the 3850 switches - sent the ports immediately into an Err-Disabled state.