100GbE QSFP28 DAC Twinax Cable 2m - Cost-Effective 100G Link

In this review of the 100GbE QSFP28 DAC Twinax Cable, the bottom line is simple: it is a practical, low-power solution for short-range 100G links between QSFP28 ports. IT professionals who need a reliable, compliant twinax cable for top-of-rack or adjacent-rack connections will appreciate the cable's passive design and optimized signal integrity. The review focuses on real deployment considerations - compatibility with common switch vendors, ease of use, thermal and power behavior, and the overall value compared with active or optical alternatives.

Key Features

• 100GbE QSFP28 Passive Twinax: Provides a plug-and-play way to establish a 100-Gigabit link between QSFP-100G ports without additional transceivers or power draw.
• 2 meter length: Matches typical rack and adjacent-rack distances so installers get reliable short-reach connectivity without excess slack.
• 30AWG construction: Offers a balance of flexibility and durability that keeps signal integrity stable across the 2m span.
• Standards compliant: Meets IEEE 802.3, SFF-8665, and QSFP28 MSA requirements for compatibility across a wide range of switches and open source devices.
• Low power and EMI: Passive design and optimized form factor minimize power consumption and electromagnetic interference in dense racks.
• Packaging and support: Arrives in an antistatic bag with a 3 year warranty and lifetime technical support from the manufacturer.

Who It's For

This cable is aimed at data center technicians, network engineers, and small enterprise ops teams who need a cost-effective 100G connection for short distances inside or between racks. It is especially suitable for environments that prioritize low power use and simple plug-and-play installation, including lab racks and production top-of-rack links.

Those who should look elsewhere include teams that require longer runs beyond 5 m, environments needing optical isolation, or deployments that demand advanced diagnostics available only with active optical or programmable transceivers.

Pros & Cons

Pros

• Cost-effective solution for short-range 100G links without separate transceivers.
• Passive 30AWG twinax design keeps power consumption and EMI low in dense racks.
• Broad compatibility with Cisco, Ubiquiti, Mikrotik, Netgear, Supermicro and many open source switches.
• Shipped in antistatic bag with a 3 year warranty and ongoing technical support.

Cons

• Passive twinax is limited to short distances compared with optical cables, so it is not suitable for long-span runs.
• Lacks the advanced monitoring features found on some active optical transceivers.

Specifications

Form factor	QSFP28 to QSFP28 passive DAC
Data rate	100GbE (up to 28.3125Gbps per channel)
Length	2 meter
Conductor	30AWG twinax
Standards	IEEE 802.3, SFF-8665, QSFP28 MSA
Operating temperature	0 ~ 70 C
RoHS	Compliant

Our Verdict

The 100GbE QSFP28 DAC Twinax Cable is a practical, high-value pick for short-range 100G connections where low power and simple installation matter. Network teams wanting a reliable, standards-compliant cable for rack-to-rack links will find it hard to beat on cost and power; those needing longer reach or built-in diagnostics should consider optical alternatives.

Frequently Asked Questions

Is this cable compatible with major switch vendors?
Yes, it is compatible with many vendors including Cisco, Ubiquiti, Mikrotik, Netgear, Supermicro and a range of open source switches when used in QSFP-100G ports.

What is the maximum supported distance?
The passive twinax design supports reliable transmission up to the specified short-reach distances (the product supports up to 5 m in the general specification, with this unit being a 2 m cable).

Does it require external power?
No, this is a passive DAC that uses a single 3.3V supply from the QSFP28 port and does not need separate power.