100GBASE-SR4 100G QSFP28 850nm 100m DOM MTP/MPO Optical Transceiver

In this review the focus is on the 100GBASE-SR4 QSFP28 multimode optical transceiver and why it matters for short-reach 100G networks. The module is aimed at data center engineers and network operators who need a straightforward, MSA-compliant 100GbE QSFP28 option compatible with Dell QSFP28-100G-SR4 ports. The single biggest reason to consider this module is dependable short-range 100G connectivity up to 70 m on OM3 and 100 m on OM4 with hot-pluggable convenience and built-in DDM for link diagnostics, making it a practical replacement or spare for fiber switches, NICs and servers.

Key Features

• Compatibility: Works with Dell QSFP28-100G-SR4 ports and other MSA-compliant devices to simplify deployment in mixed environments.
• 100Gb/s performance: QSFP28 form factor supports full 100G Ethernet throughput for high-bandwidth aggregation and server uplinks.
• Multimode reach: 850nm optics deliver up to 70 m on OM3 and up to 100 m on OM4, covering most rack-to-rack and short spine links.
• Monitoring: Built-in DDM (DOM) provides real-time diagnostic information so administrators can spot transceiver issues quickly.
• Ease of use: Hot-pluggable, plug-and-play operation allows fast replacements or additions without service interruptions.
• Quality control: Each module is individually tested on switches prior to shipping, reducing the chance of DOA failures.

Who It's For

This module is best suited for data center operators, network engineers and system integrators who require 100GbE short-reach links between switches, top-of-rack devices and high-speed servers. Its MSA compliance and Dell compatibility make it a convenient spare or replacement in environments already using QSFP28 100G-SR4 optics.

It is less suitable for long-haul or single-mode fiber deployments, and organizations needing extended temperature range beyond 0C to +70C should evaluate industrial-rated transceivers instead.

Pros & Cons

Pros

• MSA-compliant 100Gb/s performance in a QSFP28 form factor for standardized installation.
• Short-reach 850nm optics that reliably cover common OM3 and OM4 distances up to 100 m.
• Hot-pluggable with DDM support for on-the-fly monitoring and quicker troubleshooting.

Cons

• Designed for multimode fiber only, so it will not serve single-mode or long-haul links.
• Operating temperature range is 0C to +70C, which may not meet some extreme environment needs.

Specifications

Our Verdict

The 100GBASE-SR4 QSFP28 module is a practical, cost-conscious choice for standard data center short-reach 100GbE links. It provides MSA-compliant compatibility, useful DDM monitoring and covered OM3/OM4 reach, making it a good value spare or replacement for rack-level and aggregation links where single-mode or extreme temperature operation is not required.

Frequently Asked Questions

Will this module work in Dell QSFP28 ports?
Yes. It is listed as compatible with Dell QSFP28-100G-SR4 and follows MSA standards for interoperability.

What fiber and distance should I expect?
Use multimode fiber: up to 70 m on OM3 and up to 100 m on OM4 with the 850 nm optics.

Does it include monitoring features?
Yes. The transceiver supports DDM (DOM) so you can monitor optical power and other link parameters.