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Home / Products / Transceivers / 25G/40G Transceivers / 40G QSFP+ / 100024

Juniper QSFP-LR4-40G-20 Compatible 40GBASE-LR4 QSFP+ 1310nm 20km DDM LC SMF Optical Transceiver Module

Product No :100024
US$ 125.00
Compatible
Transceivers type
456 in real-time stock, 16Jun, 2025

Free Shipping over US$ 79.8

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Add to Cart Bulk Order Quotes 
1. < 3.5W Low Power Consumption.
2. Link Up to 20 km via Singlemode OS2.
2. LC Duplex Connector, DFP+PIN.
3. Fully Compatible with 100+ Vendors.
4. For Data Center and 40G Ethernet Applications.
5. Hot Pluggable QSFP+ MSA Compliant.
See more

Specifications

Juniper QSFP-LR4-40G-20 Compatible 40GBASE-LR4 QSFP+ Optical Transceiver Module (SMF, 1310nm, 20km, LC, DDM)

 

The Juniper QSFP-LR4-40G-20 compatible 40G QSFP+ LR4 transceiver module is equipped with LC duplex connectors, reaching a link up to 20km over OS2 single-mode fiber (SMF). This 40G optical transceiver comes with a bidirectional 4-channel QSFP+ connector, enabling a total of 40 Gbps bandwidth by each channel carrying a 10 Gbps data rate. DOM/DDM (digital diagnostics monitoring) function is supported on the QSFP 40G fiber optic transceiver to achieve real-time operating parameters monitoring.

 

QSFPTEK manufactured 40GBASE-LR4 QSFP+ module is compliant with QSFP+ MSA and 40GBASE-LR4 specifications. Besides, the QSFP LR4 optic has been tested on host devices to ensure full compatibility with Juniper equipment, such as data center switches, enterprise routers, and server network interface cards (NICs). The third-party 40G SFP module is an ideal substitute to the QSFP-40GE-LR4 QSFP+ 40G transceiver at an affordable price, providing a cost-effective compatible solution for high-performance 40G connectivity.

 

LR4 40G QSFP optics cater to 40 Gigabit Ethernet (40GbE) optical fiber connections, ideal for high-performance and long-distance applications in the data center, enterprise core and distribution layers, campus networks, metro networks, etc.

 

Model Name QSFP-LR4-40G-20 Vendor Name QSFPTEK
Form Factor QSFP+ Data Rate 40 Gbps
Wavelength 1310nm Distance 20km@OS2
Connector LC Duplex Cable Type OS2 SMF
Transmitter Type DFB Receiver Type PIN
TX Power -4~2.3dBm Receiver Sensitivity <-11.5dBm
Power Consumption <3.5W Modulation Format NRZ
DDM Support Bit Error Ratio (BER) 1E-12
Protocols QSFP+ MSA, SFF-8436, 40G Ethernet Warranty 5 Years
Quality Testing Program
Optical Transceivers Testing

Take a look at our test program to get the reliable and high-performance optical transceivers.

Quality Certifications

Features

  • 1. High Reliablility and Best Price
    Proudly self-producing and rigorous testing, QSFPTEK is dedicated to delivering cost-effective products with high reliability and performance at a trade price.
  • 2. Wide Application Scenarios
    Fully compatible with almost all Juniper devices. Ideal for data center, campus network, metro network, etc.
  • 3. Protocols
    Compliant with QSFP+ MSA, SFF-8436, 40G Ethernet.
  • 4. Quality Certifications
    Backed by CE, FCC, ROSH, ISO9001.

Applications

Scenario 1: 40G to 40G Direct Connectivity

Related Products:

S7300-48X2Q4C, 48-Port Gigabit Ethernet L3 Campus SFP+ Switch, 48 x10GE SFP+, with 2 x40GE QSFP+ and 4 x100GE QSFP28 Uplinks, Support Stacking

S7600-24X2Q, 24-Port Ethernet L3+ 10G Switch, 24 x10Gb SFP+, with 2 x40Gb QSFP+ Uplinks, Support MLAG, VXLAN

LC UPC to LC UPC Duplex OS2 2.0mm PVC Fiber Optic Patch Cable 10m

 

 

Scenario 2: 40GBASE-LR4 Connectivity with NIC

Related Products:

S7300-48X2Q4C, 48-Port Gigabit Ethernet L3 Campus SFP+ Switch, 48 x10GE SFP+, with 2 x40GE QSFP+ and 4 x100GE QSFP28 Uplinks, Support Stacking

LC UPC to LC UPC Duplex OS2 2.0mm PVC Fiber Optic Patch Cable 10m

Intel XL710-BM2 Based Network Interface Card, 40G Dual-Port QSFP+, PCIe 3.0 X 8, Half & Full Bracket

 

 

Scenario 3: 40GBASE-LR4 Connectivity with Adapter Panel

Related Products:

S7300-48X2Q4C, 48-Port Gigabit Ethernet L3 Campus SFP+ Switch, 48 x10GE SFP+, with 2 x40GE QSFP+ and 4 x100GE QSFP28 Uplinks, Support Stacking

LC UPC to LC UPC Duplex OS2 2.0mm PVC Fiber Optic Patch Cable 10m

1U Horizontal Cable Management with 5 D-Rings, Rackmount, Single-Sided, 19 inch

 

Product details

Various Switch Tests

 

Every module is quality tested for compatibility in the multi-brand switches environment, which guarantees flawless operations.

 

QT-QSFP-LH4 compatibility test

 

 

Tested in The Host Device to Prove Interoperability

 

Every unit sold undergoes rigorous quality testing, to ensure compatibility in the target switch environment, guaranteeing perfect operation.

 

QSFPTEK Test Rack

 

 

Various Switch Tests

 

Every module is qualified through rigorous procedures and advanced equipment to ensure high-quality and reliable optical devices for you.

 

QSFPTEK Test Devices

 

 

40G QSFP+ Model Contrast Table

 

Part Number

QT-QSFP+-SR4

QT-QSFP+-IR4

QT-QSFP+-PSM4

QT-QSFP+-LR4

QT-QSFP+-LR4-20

QT-QSFP+-ER4

QT-QSFP+-ZR4

Image

Wavelength

850nm

CWDM

1310nm

CWDM

CWDM

CWDM

LWDM 1294~1310nm

Max Distance

150m

2km

10km

10km

20km

40km

80km

Cable Type

OM3/OM4 MMF

OS2 SMF

OS2 SMF

OS2 SMF

OS2 SMF

OS2 SMF

OS2 SMF

Connector

MPO/MTP-12

LC Duplex

MPO/MTP-12

LC Duplex

LC Duplex

LC Duplex

LC Duplex

Tx Power(dBm)

-7 ~ 1

-7 ~ 2.3

-6 ~ -1

-7 ~ 2.3

-4 ~ 2.3

-2.7 ~ 4.5

-2.7 ~ 4.5

Rx Sensitivity(dBm)

-9.5

-11.5

-14.4

-13.7

-11.5

-19

-28

Power Consumption

<0.7W

<2.5W

<2.5W

< 2.5W

<3.5W

<3.5W

<5W

Source

VCSEL + PIN

DFB + PIN

4xDFB + PIN

DFB + PIN

DFB + PIN

DFB + PIN

4xDFB + APD

Operating Temperature

0 to 70°C

0 to 70°C

0 to 70°C

0 to 70°C

0 to 70°C

0 to 70°C

0 to 70°C

Questions & Answers

Customer Reviews

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  • ALL (2)
  • Customer Support (1)
  • Compatibility (2)
  • Jackson Y United States of America
    2025-06-06

    Wored flawlessly on Juniper EX4400. Once plugged into the port, the module is immediately recognized by the device and linked up as expected.

    Transceivers typeQSFP-LR4-40G-20

    CompatibleJuniper

    Verified Purchase

    Helpful

    0

  • Jrodsly Italy
    2025-04-29

    Needing 40G LR4 modules for our next project, we requested samples from QSFPTEK as first-time buyers. After testing on Juniper ACX7100-32C, all samples performed flawlessly with zero compatibility issues. Impressed by the performance and customer service, we confidently placed a bulk order for 100 units.

    Transceivers typeQSFP-LR4-40G-20

    CompatibleJuniper

    Verified Purchase

    Helpful

    0

Resources

  • PDF Document
    QT-QSFP+-LH4 Datasheet.pdf
  • PDF Document
    Transceiver Module User Guide.pdf
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Juniper QSFP-LR4-40G-20 Compatible 40GBASE-LR4 QSFP+ 1310nm 20km DDM LC SMF Optical Transceiver Module

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Transceivers type QSFP-LR4-40G-20

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Mark

2023-12-15
This product works well with my switch, and I plan to buy some DWDM transceivers from QT. Excellent value fo ct works well with my switch, and I plan to buy some DWDM transceivers from QT. Excellent valur money!

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Juniper QSFP-LR4-40G-20 Compatible 40GBASE-LR4 QSFP+ 1310nm 20km DDM LC SMF Optical Transceiver Module
US$ 125.00
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Juniper
Transceivers type
QSFP-LR4-40G-20
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Juniper QSFP-LR4-40G-20 Compatible 40GBASE-LR4 QSFP+ 1310nm 20km DDM LC SMF Optical Transceiver Module

Compatible Juniper

Transceivers type QSFP-LR4-40G-20

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