Dell EMC 3CSFP91 Compatible QSFP+ Module - 40GBASE-ER4 - Single Mode Fiber (SMF) - 40GE Gigabit Ethernet QSFP+ - LC 40 km - 1270nm to 1330nm - DDM

40 Gbps | Single Mode Fiber | LC | 40 km (24.8 mi) | Lifetime Warranty

Product ID: QSFP40GER4ES

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  • 100% Dell EMC 3CSFP91 COMPATIBLE: Designed, programmed and tested to work with compatible Dell EMC switches and routers to deliver dependable 40GbE connectivity
  • TECHNICAL SPECS: 40GBASE-ER4 | 40 Gbps | Single Mode | LC Connector | 1270nm to 1330nm | Digital Diagnostic Monitoring (DDM) | Distances up to 40 km (24.9 mi)
  • TESTED FOR OEM HOST COMPATIBILITY: Hot-swappable in Dell EMC routers and switches; DDM support reports the transceiver's status to most SNMP network management tools
Your price
€4.327,99 EUR excl. VAT
€5.193,59 EUR incl. VAT

100% Dell EMC Compatible. Guaranteed.

The QSFP40GER4ES is a Dell EMC QSFP-40G-ER4 compatible fiber transceiver module that has been designed, programmed and tested to work with Dell EMC brand compatible switches and routers. It delivers dependable 40 GbE connectivity over fiber cable, for 40GBase-ER4Q compliant networks, with a maximum distance of up to 40 km (24.8 mi).

Technical Specifications:

• Wavelength: 1311nm

• Maximum Data Transfer Rate: 40 Gbps

• Type: Single Mode

• Connection Type: LC

• Maximum Transfer Distance: 40 km (24.8 mi)

• MTBF: 8,596,956 hours

• Power Consumption: < 1.6W

• Digital Diagnostics Monitoring (DDM): Yes

This QSFP+ module is hot-swappable making upgrades and replacements seamless by minimizing network disruptions. SFPs

All SFP & SFP+ transceiver modules are backed by a Lifetime Warranty and Free Lifetime Multilinugal Technical Support. offers a wide variety of SFP modules and direct-attach SFP Cables, providing the dependability and reliability you need to ensure consistent network performance.

Partner Numbers

  • Ingram Austria V934729
  • UPC 065030884280


Warranty Information Warranty Lifetime
Material Steel
Connector(s) 1 - Connector A SFP Slot
1 - Connector B Fiber Optic LC Duplex
Environmental Operating Temperature 0°C - 70°C
Storage Temperature -40°C - 85°C
Humidity 0 - 85%
Hardware Compatible Brand Dell EMC
Industry Standards IEEE 802.3ba 40GBASE-ER4Q
Packaging Information Package Height 35 cm [13,8 in]
Package Length 20,5 cm [8,1 in]
Shipping (Package) Weight 60 g [2,1 oz]
Package Width 12 cm [4,7 in]
Performance Power Consumption (In Watts) < 3.5W
MTBF 1,400,000 hours
Compatible Networks 40 Gbps
Type Single Mode
Maximum Data Transfer Rate 40.00 Gbps
Max Transfer Distance 40 km (24.8 mi)
Wavelength 1270nm to 1330nm
Fiber Operating Mode Full-Duplex
Physical Characteristics Product Height 1,3 cm [0,5 in]
Product Length 1,4 cm [0,5 in]
Weight of Product 40 g [1,4 oz]
Product Width 5,8 cm [2,3 in]
What's in the Box 1 - Included in Package QSFP+ Transceiver


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Frequently Asked Questions

Before You Buy

UPC and APC are fiber connector types. UPC (Ultra Physical Contact) connectors have a fiber connector end face that has been polished to a dome-shape. APC (Angled Physical Contact) connectors have a fiber connector end face that has been polished at an eight degree angle. When building fiber solutions, be sure to avoid mixing UPC and APC connectors. UPC and APC cannot mate with one another because causes the fiber cores don’t touch. This can cause a degraded connection or none at all. fiber products use UPC connectors.

Compliance and safety

Compliance letters

Safety Measures

  • If product has an exposed circuit board, do not touch the product under power.
  • If Class 1 Laser Product. Laser radiation is present when the system is open.
  • Wiring terminations should not be made with the product and/or electric lines under power.
  • Product installation and/or mounting should be completed by a certified professional as per the local safety and building code guidelines.
  • Cables (including power and charging cables) should be placed and routed to avoid creating electric, tripping or safety hazards.
*Product appearance and specifications are subject to change without notice.

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