40G QSFP+ LR4 Transceiver for Dell 430-4917/407-BBGN - 10km

In this review the QSFPTEK 40G QSFP+ Module LR4 is examined for network engineers and IT teams who need a drop-in compatible 40G optics option for Dell networking gear. The bottom line: it delivers a straightforward, hot-pluggable 40G Ethernet link with four CWDM lanes and built-in monitoring, making it useful for short metro and data center single-mode runs up to 10km. For those replacing failed optics or expanding 40GbE ports without vendor-branded modules, this module represents a pragmatic balance of compatibility and value.

Key Features

• Compatibility: Works as a compatible replacement for Dell (DE) Networking 430-4917/407-BBGN, easing upgrades or repairs on existing switches and routers.
• 40G Performance: Supports 40GBASE-LR4 over single-mode fiber using four CWDM lanes to deliver high-bandwidth links up to 10km.
• LC Duplex Connector: Uses standard Duplex LC cabling for easy integration into typical single-mode patching and trunking infrastructure.
• DDM Monitoring: Digital Diagnostics Monitoring provides real-time status on optical power and temperature to help troubleshoot and prevent downtime.
• Wide Operating Range: Rated for operation from 0C to +70C with Tx power and Rx sensitivity metrics suitable for data center and campus fiber links.
• Plug-and-Play: Hot-pluggable QSFP+ form factor and compliance with SFF-8436 and QSFP MSA mean simple installation without special configuration.

Who It's For

The module is best for IT administrators, network technicians, and systems integrators who need a cost-effective, compatible 40G LR4 transceiver for Dell networking equipment or any device that accepts QSFP+ LR4 optics. It is particularly suitable for data center spine-leaf links, short metro spans, or aggregation links where single-mode fiber and LC connectors are already deployed.

Those who should look elsewhere include operators requiring extended temperature ranges below 0C, proprietary vendor-locked optics firmware, or specialized service-level guarantees; in those cases, purchasing directly from the original network vendor or a certified partner may be preferable.

Pros & Cons

Pros

• Compatible with Dell 430-4917/407-BBGN and other QSFP+ ports for flexible replacement or expansion.
• Supports 40GBASE-LR4 with four CWDM lanes for reliable 40GbE over single-mode fiber up to 10km.
• DDM support and hot-pluggable design simplify monitoring and maintenance without downtime.
• Each module is individually tested before shipping, helping ensure plug-and-play reliability out of the box.

Cons

• Working temperature begins at 0C, so it may not suit outdoor enclosures or extreme cold environments.
• Not a vendor-branded original part, which may be a concern for organizations requiring manufacturer-certified optics.

Specifications

Product Type	40G QSFP+ LR4 Single-Mode Transceiver
Compatibility	Dell (DE) Networking 430-4917 / 407-BBGN
Wavelengths	4 CWDM lanes: 1270nm, 1290nm, 1310nm, 1330nm
Connector	Duplex LC
Max Distance	Up to 10 km on single-mode fiber
Temperature Range	0C to +70C
Tx Power / Rx Sensitivity	Tx: -7 to +2.3 dBm, Rx sensitivity < -13.7 dBm

Our Verdict

For teams needing a reliable, plug-and-play 40G LR4 transceiver compatible with Dell networking gear, this QSFPTEK module is a practical, well-tested option that covers common data center and short metro needs. It offers DDM diagnostics, standard LC connectivity, and 10km reach at a price-performance point that makes sense for replacements and network growth, though users with extreme environmental needs or strict vendor sourcing policies should evaluate alternatives.

Frequently Asked Questions

Will this module work in Dell switches that list the 430-4917 part?
Yes, it is designed as a compatible replacement for Dell (DE) Networking 430-4917/407-BBGN and should operate in QSFP+ ports that accept LR4 optics.

Does the module provide optical diagnostics?
Yes, it supports Digital Diagnostics Monitoring (DDM) so you can monitor parameters like optical power and temperature.

How far can it transmit?
It supports single-mode fiber links up to 10 km using four CWDM lanes at the specified wavelengths.