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Cisco QSFP-40G-LR4-S Compatible 40GBASE-LR4 QSFP+ 40G 1310nm 10km DOM Duplex LC/UPC SMF Ethernet Optical Transceiver Module
Cisco QSFP-40G-LR4-S Compatible 40GBASE-LR4 QSFP+ 40G 1310nm 10km DOM Duplex LC/UPC SMF Ethernet Optical Transceiver Module
Cisco QSFP-40G-LR4-S Compatible 40GBASE-LR4 QSFP+ 40G 1310nm 10km DOM Duplex LC/UPC SMF Ethernet Optical Transceiver Module
P/N: QSFP-40G-LR4
$107.00
3
Solds
2
Reviews
3
Questions
safeguard
4-Year Warranty
30-Day Returns
30-Day Exchange
（1 In Stock）

Product Highlights

Max Power Consumption < 3.5W
Complies with Class 1 FDA Laser Safety Standards
Supports Digital Diagnostic Monitoring Functionality
Compliant with Hot Pluggable QSFP+ MSA, IEEE802.3ba Standard
Compliant with RoHS Environmental Protection Standards (Lead-Free)
Provide Compatibility Test Reports for Multiple Brand Switches
See more
Specifications
Certification
Connectivity Solutions
Comparison Table
Q&A
Reviews
Resources
Cisco QSFP-40G-LR4-S Compatible 40GBASE-LR4 QSFP+ 40G 1310nm 10km DOM Duplex LC/UPC SMF Ethernet Optical Transceiver Module
The 40G-QSFP-LR4 is a high-performance transceiver module designed for long-range optical communication applications, supporting transmission distances of up to 10 kilometers. It complies with the IEEE P802.3ba 40GBASE-LR4 standard, ensuring reliable and efficient data transmission. The module converts four input channels of 10Gb/s electrical data into four CWDM optical signals, which are then multiplexed into a single channel for 40Gb/s optical transmission. On the receiver side, it de-multiplexes a 40Gb/s optical input into four CWDM channels and converts them back into four channels of electrical data.
Specifications
Form Factor
QSFP+
Data Rate
44.8Gbps
Media
SMF
Wavelength
1264.5~1277.5nm@Lane 0 1284.5~1297.5nm@Lane 1 1304.5~1317.5nm@Lane 2 1324.5~1337.5nm@Lane 3
Connector
Duplex LC UPC
Distance
10km
Transmitter Type
DFB
Receiver Type
PIN
Electrical Modulation
4x 11.2G NRZ
Optical Modulation
4x 11.2G NRZ
Power Consumption
≤3.5W
Case Operating Temperature
0 to 70°C (32 to 158°F)
Protocol
40 Gigabit Ethernet OTN OTU3
Application
Swicth to Switch OTN Equipment Other Optical Links
Certification
Product
Product
Product
Product
Product
Product
Product
Product
Product
Product
Connectivity Solutions
Cisco Catalyst Switch links：40G QSFP+ to 40G QSFP+
All
Cisco Catalyst Switch links：40G QSFP+ to 40G QSFP+
Comparison Table
Cisco Compatible 40GBASE-SR4 QSFP+40G 850nm 100m DOM MTP/MPO-12 UPC MMF Transceiver Module
QSFP-40G-SR4
Cisco Meraki Compatible 40GBASE-LR4 QSFP+ 40G 1310nm 10km DOM LC SMF Transceiver Module
QSFP-40G-LR4
Form Factor QSFP+QSFP+
Data Rate 41.25Gbps44.8Gbps
Media MMFSMF
Wavelength 850nm1264.5~1277.5nm@Lane 0 1284.5~1297.5nm@Lane 1 1304.5~1317.5nm@Lane 2 1324.5~1337.5nm@Lane 3
Connector MTP/MPO-12 UPCDuplex LC UPC
Distance 100m@OM3 150m@OM410km
Transmitter Type VCSELDFB
Receiver Type PINPIN
Electrical Modulation 4x 10.3125G NRZ4x 11.2G NRZ
Optical Modulation 4x 10.3125G NRZ4x 11.2G NRZ
Power Consumption ≤1.5W≤3.5W
Case Operating Temperature 0 to 70°C (32 to 158°F)0 to 70°C (32 to 158°F)
Protocol 40 Gigabit Ethernet 4x 10G Breakout Ethernet40 Gigabit Ethernet OTN OTU3
Application Swicth to Switch Switch to NIC Router to NIC Other Optical LinksSwicth to Switch OTN Equipment Other Optical Links
Form Factor
Data Rate
Media
Wavelength
Connector
Distance
Transmitter Type
Receiver Type
Electrical Modulation
Optical Modulation
Power Consumption
Case Operating Temperature
Protocol
Application
Cisco Compatible 40GBASE-SR4 QSFP+40G 850nm 100m DOM MTP/MPO-12 UPC MMF Transceiver Module
QSFP-40G-SR4
Cisco Meraki Compatible 40GBASE-LR4 QSFP+ 40G 1310nm 10km DOM LC SMF Transceiver Module
QSFP-40G-LR4
QSFP+
QSFP+
41.25Gbps
44.8Gbps
MMF
SMF
850nm
1264.5~1277.5nm@Lane 0 1284.5~1297.5nm@Lane 1 1304.5~1317.5nm@Lane 2 1324.5~1337.5nm@Lane 3
MTP/MPO-12 UPC
Duplex LC UPC
100m@OM3 150m@OM4
10km
VCSEL
DFB
PIN
PIN
4x 10.3125G NRZ
4x 11.2G NRZ
4x 10.3125G NRZ
4x 11.2G NRZ
≤1.5W
≤3.5W
0 to 70°C (32 to 158°F)
0 to 70°C (32 to 158°F)
40 Gigabit Ethernet 4x 10G Breakout Ethernet
40 Gigabit Ethernet OTN OTU3
Swicth to Switch Switch to NIC Router to NIC Other Optical Links
Swicth to Switch OTN Equipment Other Optical Links
Questions & Answers
edit icon Ask a question
All (3) Management (1)Compatibility (1)Installation (1)
Q:

Do I need to configure anything before installation?

by p***m on 2025-03-10 15:22:00

A:

No major configuration is required; most modules are plug-and-play.

by AICPLIGHT on 2025-03-10 17:22:23

like icon Helpful 0
comment icon Comment 0
Q:

What should I do if there is no signal?

by O***m on 2025-02-27 20:40:45

A:

Check polarity, cleanliness, and compatibility first.

by AICPLIGHT on 2025-02-28 06:29:21

like icon Helpful 0
comment icon Comment 0
Q:

Can these be used in harsh environments?

by p***m on 2025-01-23 03:32:50

A:

We offer industrial-grade models for rugged applications.

by AICPLIGHT on 2025-01-23 12:15:25

like icon Helpful 0
comment icon Comment 0
Customer Reviews
edit icon Write a review
All (2) Compatibility (1)Customer Support (1)
h
h***m
2025-04-16 15:58:18
Confirmed Purchase
5.0

Our core switches from Huawei and Arista detected the optics instantly. Compatibility is on par with the big-name brands, but at a fraction of the cost.

link icon Helpful 0
comment icon Comment 0
s
s***m
2025-04-16 12:18:14
Confirmed Purchase
5.0

We had a question about DOM support, and the vendor provided full documentation within hours, including screenshots and test results.

link icon Helpful 0
comment icon Comment 0
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