100GBASE-SR4 QSFP28 850nm Optical Transceiver - Low Power 3.5W

In this review of the 100GBASE-SR4 QSFP28 850nm optical transceiver the bottom line is simple: this module is for network engineers and data center operators who need a reliable, low-power 100G short-reach link compatible with many platforms. The reviewer found it performs as expected for campus and enterprise core layers, is hot-pluggable, and keeps power consumption down to about 3.5W. If you need a straightforward, standards-compliant QSFP28 module that works across vendors, this review explains why it is worth considering.

Key Features

• 100G Rate: Delivers a full 100 gigabit per second link suitable for aggregation and server uplinks in modern networks.
• LC Connector: Uses LC duplex fiber terminations for common multimode fiber patching and easy integration with existing trunks.
• DDM Monitoring: Supports digital diagnostics monitoring so operators can track optical power and module status in real time.
• Low Power: Consumes approximately 3.5W, helping reduce rack power and cooling needs in dense deployments.
• Wide Compatibility: Stated compatibility with 200+ vendors makes it a practical replacement or spare for mixed-vendor environments.
• Hot Pluggable: QSFP28 MSA compliance allows insertion and removal without shutting down connected equipment for minimal downtime.

Who It's For

This transceiver is aimed at campus networks, data centers, and enterprise core layers that require short-reach 100G links over multimode fiber. It is a solid choice for network admins who need a low-power, vendor-compatible QSFP28 module for aggregation, spine-leaf links or server uplinks.

Organizations that need extended reach singlemode optics or integrated active optical cable assemblies should look elsewhere, since this module is an SR4 850nm multimode part designed for short distances up to about 100m on suitable multimode fiber.

Pros & Cons

Pros

• Standards-based 100G QSFP28 form factor provides predictable interoperability when deployed correctly.
• Low power consumption of roughly 3.5W reduces operating costs in dense racks.
• DDM support offers useful real-time telemetry for troubleshooting and link management.

Cons

• Limited to short-reach 850nm multimode links, so it is not suitable for long-haul or singlemode links.

Specifications

Rate	100G
Form Factor	QSFP28 (hot pluggable)
Wavelength	850nm
Connector	LC
Power Consumption	Approximately 3.5W
Monitoring	DDM (digital diagnostics)
Compatibility	Compatible with 200+ vendors

Our Verdict

This QSFP28 100GBASE-SR4 module is a pragmatic choice for anyone needing short-reach 100G multimode links in campus or data center core networks. It offers low power, vendor compatibility, and basic diagnostics at a reasonable value, making it a dependable spare or replacement for mixed-vendor environments.

Frequently Asked Questions

Is this module hot pluggable?
Yes, it is a hot-pluggable QSFP28 MSA-compliant transceiver designed for insertion and removal without powering down the host.

What fiber and reach does it support?
It uses 850nm multimode optics for short-reach links, typically up to about 100m on compatible multimode fiber.

Does it provide diagnostic monitoring?
Yes, the module supports DDM so you can monitor optical power and module parameters remotely.