100G QSFP28 LR4 | Transceivers

FREE SHIPPING on Orders Over US$99

English English

Keysight QSFP28 LR4 Compatible 100GBASE-LR4 QSFP28 100G 1310nm 10km DOM Duplex LC/UPC SMF Ethernet Optical Transceiver Module

P/N: QSFP-100G-LR4

$229.00

Solds

Reviews

Questions

4-Year Warranty

30-Day Returns

30-Day Exchange

（1 In Stock）

Product Highlights

Built-in Semtech Chip, Max. Power Consumption 3.5W

Tested in Targeted Switches for Superior Performance

Adopt Reliable, Airtight, and Radiative BOX Packaging

Hot Pluggable QSFP28 MSA Compliant

Compliant with IEEE 802.3 100GBASE-LR4 standard, featuring Class 1 FDA laser safety and RoHS compliance

Interoperable with Other IEEE-compliant 100G Interfaces for Seamless Integration

Digital Optical Monitoring for Strong Diagnostics

Specifications

Certification

Connectivity Solutions

Comparison Table

Q&A

Reviews

Resources

Keysight QSFP28 LR4 Compatible 100GBASE-LR4 QSFP28 100G 1310nm 10km DOM Duplex LC/UPC SMF Ethernet Optical Transceiver Module

The QSFP28 module provides 100GBase-LR4 throughput up to 10km over a standard pair of single mode fiber (SMF) with duplex LC connectors. This transceiver is compliant with IEEE 802.3 100GBASE-LR4, SFF-8665 and SFF-8636 standards. Digital diagnostics functions are also available via the I2C interface, as specified by the QSFP28 MSA, to allow access to real-time operating parameters. With these features, this easy to install, hot swappable transceiver is suitable to be used in various applications, such as 100G telecom connections, data center, high-performance computing networks, enterprise core and distribution layers, campus networks etc.

Specifications

Form Factor

QSFP28

Data Rate

103.125Gbps

Media

SMF

Wavelength

1294.53~1296.59nm@Lane 0 1299.02~1301.09nm@Lane 1 1304.54~1305.63nm@Lane 2 1308.09~1310.09nm@Lane 3

Connector

Duplex LC UPC

Distance

10km

Transmitter Type

EML

Receiver Type

Electrical Modulation

4x 25.78125G NRZ

Optical Modulation

4x 25.78125G NRZ

Power Consumption

≤3.5W

Case Operating Temperature

0 to 70°C (32 to 158°F)

Protocol

100 Gigabit Ethernet 100G Infiniband EDR

Application

Swicth to Switch Switch to NIC Router to NIC Other Optical Links

Certification

Connectivity Solutions

Keysight Network Packet Brokers links：100G QSFP28 to 100G QSFP28

All

Comparison Table

	QSFP-100G-SR4	QSFP-100G-CWDM4	QSFP-100G-LR4
Form Factor	QSFP28	QSFP28	QSFP28
Data Rate	103.125Gbps	103.125Gbps	103.125Gbps
Media	MMF	SMF	SMF
Wavelength	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	1294.53~1296.59nm@Lane 0 1299.02~1301.09nm@Lane 1 1304.54~1305.63nm@Lane 2 1308.09~1310.09nm@Lane 3
Connector	MTP/MPO-12 UPC	Duplex LC UPC	Duplex LC UPC
Distance	70m@OM3 100m@OM4	2km	10km
Transmitter Type	VCSEL	DFB	EML
Receiver Type	PIN	PIN	PIN
Electrical Modulation	4x 25.78125G NRZ	4x 25.78125G NRZ	4x 25.78125G NRZ
Optical Modulation	4x 25.78125G NRZ	4x 25.78125G NRZ	4x 25.78125G NRZ
Power Consumption	≤2.5W	≤3.5W	≤3.5W
Case Operating Temperature	0 to 70°C (32 to 158°F)	0 to 70°C (32 to 158°F)	0 to 70°C (32 to 158°F)
Protocol	100 Gigabit Ethernet 4x 25G Breakout Ethernet 100G Infiniband EDR	100 Gigabit Ethernet 100G Infiniband EDR	100 Gigabit Ethernet 100G Infiniband EDR
Application	Swicth to Switch Switch to NIC Router to NIC Other Optical Links	Swicth to Switch Switch to NIC Router to NIC Other Optical Links	Swicth to Switch Switch to NIC Router to NIC 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 100GBASE-SR4 QSFP28 850nm 100m MPO-12/UPC MMF Transceiver Module

QSFP-100G-SR4

Cisco Compatible 100GBASE-CWDM4 QSFP28 100G 1310nm 2km DOM Duplex LC/UPC SMF Transceiver Module

QSFP-100G-CWDM4

QSFP-100G-LR4

QSFP28

103.125Gbps

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

1294.53~1296.59nm@Lane 0 1299.02~1301.09nm@Lane 1 1304.54~1305.63nm@Lane 2 1308.09~1310.09nm@Lane 3

MTP/MPO-12 UPC

Duplex LC UPC

70m@OM3 100m@OM4

2km

10km

VCSEL

DFB

EML

4x 25.78125G NRZ

≤2.5W

≤3.5W

0 to 70°C (32 to 158°F)

100 Gigabit Ethernet 4x 25G Breakout Ethernet 100G Infiniband EDR

100 Gigabit Ethernet 100G Infiniband EDR

Swicth to Switch Switch to NIC Router to NIC Other Optical Links

Questions & Answers

Ask a question

All (8) Application (2)Compatibility (2)Installation (1)Performance (3)

Is polarity important during installation?

by n***m on 2025-09-26 10:49:52

Yes, ensure Type A/B polarity matches across the link.

by AICPLIGHT on 2025-09-26 16:30:25

Helpful 0

Can these be used in harsh environments?

by 6***m on 2025-09-19 04:50:30

We offer industrial-grade models for rugged applications.

by AICPLIGHT on 2025-09-19 08:51:02

Helpful 0

What fiber connectors are supported?

by A***m on 2025-09-08 19:19:38

We support LC, MPO, and MTP connectors based on the module type.

by AICPLIGHT on 2025-09-09 01:33:19

Helpful 0

Will this work in mixed vendor networks?

by M***m on 2025-08-14 23:53:04

Yes, our products are designed for interoperability.

by AICPLIGHT on 2025-08-15 10:53:24

Helpful 0

Are these modules low power?

by 6***m on 2025-06-29 17:44:41

Yes, we offer energy-efficient versions with low power consumption.

by AICPLIGHT on 2025-06-29 20:01:18

Helpful 0

Are these suitable for edge computing?

by J***m on 2025-06-24 07:03:52

Yes, compact and high-performance modules are available for edge devices.

by AICPLIGHT on 2025-06-24 07:55:32

Helpful 0

Customer Reviews

Write a review

All (6) Performance (1)Compatibility (2)Ease of Use (1)Customer Support (1)Value (1)

H***m

2025-08-30 20:12:17

Confirmed Purchase

5.0

These transceivers were immediately recognized by our Dell and HPE servers with no firmware complaints. It was a simple swap from our OEM modules.

Helpful 0

b***m

2025-08-09 01:26:04

Confirmed Purchase

5.0

These transceivers were immediately recognized by our Dell and HPE servers with no firmware complaints. It was a simple swap from our OEM modules.

Helpful 0

u***m

2025-07-14 06:18:54

Confirmed Purchase

5.0

They came with dust caps and clear product labeling, making it easy for our technicians to inventory and deploy them across racks.

Helpful 0

j***m

2025-07-10 12:34:30

Confirmed Purchase

5.0

The RMA process for one faulty unit was smooth and quick. Replacement shipped out the same day, with excellent communication throughout.

Helpful 0

B***m

2025-06-21 00:20:24

Confirmed Purchase

5.0

Allowed us to expand port capacity without blowing the budget. Ideal for mid-sized IT teams and MSPs.

Helpful 0

7***m

2025-06-07 08:36:54

Confirmed Purchase

5.0

The 25G modules provided the bandwidth we needed for our ESXi hosts without causing compatibility issues with our SFP28 ports. Latency stayed under control and the modules remained cool to the touch.

Helpful 0

Resources