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Juniper Networks QSFP-40G-ER4 Compatible 40GBASE-ER4 QSFP+ 1310nm 40km Optical Transceiver Module

Product No: 76470
22 Reviews
1.1K Sold
US$ 419.00
216 in real-time stock, 23 Jun, 2026

Free Shipping over US$ 79.8

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Warranty
Providing industry-leading limited lifetime warranty.
Please check our warranty policy for details.
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Exchanges caused by the customer's reasons will not be accepted.
Please ensure that the item you're returning is repackaged with all the cords, adapters, and documentation included when you receive it.
Please check our Return Policy for details.
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1. Rate: 40G; Connector: Duplex lC; with DDM
2. DFB+PIN; Low Power Consumption <3.5W
3. Applied in Campus Network and Data Center
4. Fully Compatible with 100+ Vendors
5. QSFP+ MSA Compliant	
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Specifications

Juniper Networks QSFP-40G-ER4 Compatible 40GBASE-ER4 QSFP+ Optical Transceiver Module (SMF, 1310nm, 40km, LC, DDM)

 

The Juniper Networks QSFP-40G-ER4 compatible 40G QSFP+ transceiver module is equipped with LC duplex connectors, reaching a link up to 10km 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 40G fiber optic transceiver to achieve real-time operating parameters monitoring.

 

QSFPTEK manufactured 40GBASE-ER4 QSFP+ module is compliant with QSFP+ MSA and IEEE 802.3ba 40GBASE-ER4 specifications. Besides, the quad small form-factor pluggable (QSFP) ER4 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 Juniper Networks QSFP-40G-ER4 QSFP+ 40G transceiver at an affordable price, providing a cost-effective compatible solution for high-performance 40G connectivity.

 

ER4 40G QSFP optics cater to 40 Gigabit Ethernet (40GbE) optical fiber connections, ideal for high-performance and long-distance applications in long-haul networks, campus networks, metro networks, etc.

 

Model Name QSFP-40G-ER4 Vendor Name QSFPTEK
Form Factor QSFP+ Data Rate 40 Gbps
Wavelength 1310nm Distance 40km@OS2
Connector LC Duplex Cable Type OS2 SMF
Transmitter Type DFB Receiver Type PIN
TX Power -2.7~4.5dBm Receiver Sensitivity <-19dBm
Power Consumption <3.5W Modulation Format NRZ
DDM Support Bit Error Ratio (BER) 1E-12
Protocols IEEE 802.3ba, QSFP+ MSA, SFF-8436, SFF-8636, Infiniband 40G QDR Warranty 5 Years
Quality Testing Program
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 trade price.
  • 2. Wide Application Scenarios
    Fully compatible with almost all Juniper devices. Ideal for long-haul networks, campus networks, metro networks.
  • 3. Protocols
    Compliant with IEEE 802.3ba, QSFP+ MSA, SFF-8436, SFF-8636.
  • 4. Quality Certifications
    Backed by CE, FCC, ROSH, ISO9001.

Applications

Scenario 1: 40GBASE-ER4 Connectivity with NIC

40GBASE-ER4 Connectivity with NIC

  


  

Scenario 2: 40GBASE-ER4 Connectivity with ODF

40GBASE-ER4 Connectivity with ODF

 

Product details

Various Switch Tests

 

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

 

transceiver compatibility tests

 


 

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.

 

 


 

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 Deivces

 


 

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

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  • Premium Service (2)
  • Excellent Quality (2)
  • Shopping Experience (2)
  • Stable (1)
  • High Reliability (1)
  • High Performance (1)
  • Good Price (1)
  • Good Packaging (1)
  • Fast Delivery (3)
  • Charles United States of America
    2026-01-30

    We deployed this 40GBASE-ER4 QSFP+ module on a 40 km link, and it's been very reliable. Easy to install, stable performance, and good compatibility with our switches. A solid choice for long-reach 40G connections.

    Transceivers typeQSFP-40G-ER4

    CompatibleJuniper

    Verified Purchase

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  • Paul United States of America
    2026-01-09

    I found the right 40GBASE-ER4 QSFP+ optical transceiver easily on the website, and the ordering process was straightforward. Delivery was impressively fast, and the module has been working reliably. What stood out most was the friendly and highly responsive support team, who quickly helped replace a defective unit. Overall, a very positive experience and highly satisfied with both the product and service.

    Transceivers typeQSFP-40G-ER4

    CompatibleJuniper

    Verified Purchase

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    0

  • Andrew United States of America
    2025-10-30

    I purchased two 40G ER4 optical modules along with matching LC duplex patch cords, as the price for these cables was quite reasonable. I haven't used them yet, but the packaging appears sturdy, the products look undamaged, and they should function properly.

    Transceivers typeQSFP-40G-ER4

    CompatibleJuniper

    Verified Purchase

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  • Daniel United Kingdom
    2025-10-17

    We are building a new data center that requires a large number of transceivers and cables. After carefully evaluating multiple factors, we found QSFPTEK to be the best choice. Given our high consumption, after-sales service is extremely important, and the warranty on these 40G QSFP+ transceivers provides great peace of mind. Once our project began, having a reliable supplier became essential—and QSFPTEK has consistently delivered excellent quality, responsive service, and fair pricing.

    Transceivers typeQSFP-40G-ER4

    CompatibleJuniper

    Verified Purchase

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  • Eli United States of America
    2025-07-11

    Excellent 40G ER4 module for long-distance connections. We achieved stable 40km data center links with no issues. Fast shipping and solid performance.

    Transceivers typeQSFP-40G-ER4

    CompatibleJuniper

    Verified Purchase

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    0

  • Alex Gabriel United States of America
    2025-04-30

    The price for the 40G QSFP+ ER4 module was the best I could find online. The ordering process was quick and hassle-free—I completed the purchase within minutes. Shipping was fast, and I received the modules sooner than expected.

    Transceivers typeQSFP-40G-ER4

    CompatibleJuniper

    Verified Purchase

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  • Jacob Williams United States of America
    2022-09-27

    I need to connect two switches at two buildings, the distance is about 29m. This ER4 QSFP+ matches my need. Thanks for the product and service.

    Transceivers typeQSFP-40G-ER4

    CompatibleJuniper

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Resources

  • PDF Document
    QT-QSFP+-ER4 Datasheet.pdf
  • PDF Document
    Transceiver Module User Guide.pdf
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Juniper Networks QSFP-40G-ER4 Compatible 40GBASE-ER4 QSFP+ 1310nm 40km Optical Transceiver Module

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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 Networks QSFP-40G-ER4 Compatible 40GBASE-ER4 QSFP+ 1310nm 40km Optical Transceiver Module
US$ 419.00
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