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    Home / Products / Transceivers / 25G/40G Transceivers / 40G QSFP+ / 76470

    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
    Compatible
    Transceivers type
    216 in real-time stock, 23 Jun, 2026

    Free Shipping over US$ 79.8

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    5-Year Warranty 30-Day Returns 90-Day Exchange
    Warranty
    Providing industry-leading limited lifetime warranty.
    Please check our warranty policy for details.
    Returns & Exchange
    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.
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    Add to Cart Bulk Order Quotes 
    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
    See more

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

    Compatible Juniper

    Transceivers type QSFP-40G-ER4

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