Welcome to QSFPTEK Global     Free shipping on U.S. & EU orders over US$79.8     Global warehouse

Currency: USD
USD - US Dollar
EUR - Euro
JPY - Japanese Yen
KRW - Korean Won
English
Contact Us
Search

Cart

0
Free shipping on U.S. & EU orders over US$79.8
English
  • English

    • Chat Now

    [email protected]

    (858) 583 6532

    Currency: USD
    Choose language
    Back
    • USD - US Dollar
    • EUR - Euro
    • JPY - Japanese Yen
    • KRW - Korean Won
    Back

    -
    +

    Add to Cart

    Home / Products / Transceivers / 100G/200G Transceivers / 100G QSFP28 / 100372

    Cisco QSFP-100G-ER4L Compatible 100GBASE-ER4L QSFP28 1310nm 40km LC Duplex SMF DDM Optical Transceiver Module (Extended Temperature)

    Product No: 100372
    5 Reviews
    54 Sold
    US$ 999.00  US$ 1,799.00
    Compatible
    Transceivers type
    211 in real-time stock, 04 Jun, 2026

    Free Shipping over US$ 79.8

    Global warehouses in stock

    14-day Return and Refund

    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.
    Please check our Return Policy for details.
    -
    +
    Add to Cart Bulk Order Quotes 
    1. Data Rate: 100G; Connector: LC; with DDM
2. Tx: EML / Rx: SOA+PIN; Low Power Consumption ≤5.5W
3. Extended Temperature Range -20 to 85ºC ( -4 to 185 °F)
4. Compatible with 200+ Vendors
5. Applied in Campus Network, Data Center and Enterprise Core Layer
    See more

    Specifications

    Cisco QSFP-100G-ER4L Compatible 100GBASE-ER4L QSFP28 Optical Transceiver Module (Extended Temp., SMF, 1310nm, 40km, LC, DOM)

     

    The Cisco extended temperature QSFP-100G-ER4L compatible QSFP28 optical transceiver module is designed with duplex LC connectors, reaching a link up to 40km over single-mode fiber(SMF). QSFPTEK manufactured 100GBASE-ER4L QSFP28 transceiver module is compliant with IEEE 802.3bm, SFF-8636, and QSFP28 MSA standards. Besides, DDM (digital diagnostics monitoring) function is supported on the 100G fiber optic transceiver to achieve real-time operating parameters monitoring. With these features, this 100G QSFP28 transceiver is widely applied in 100G telecom connections, data centers, high-performance computing networks, enterprise core and distribution layers, campus networks, etc.

     

    Part Number:

    QT-QSFP28-ER4-EXD

    Vendor Name:

    QSFPTEK

    Form Factor:

    QSFP28

    Data Rate:

    103.1Gbps

    Wavelength:

    1310nm

    Distance:

     40km

    Connector:

    Duplex LC

    Cable Type:

    OS2 SMF

    Transmitter:

    EML

    Receiver Type:

    SOA+PIN

    TX Power:

    -2.5~6.5dBm

    Receiver Sensitivity:

    <-20.5dBm

    Power Consumption:

    ≤5.5W

    Temperature

    -20 to 85ºC ( -4 to 185 °F)

    DDM:

    Support

    Bit Error Ratio (BER):

    1.00E-12

    Protocols:

    IEEE 802.3bm, SFF-8636, QSFP28 MSA Compliant

    Warranty:

    3 Years

     

    Quality Testing Program
    Optical Transceivers Testing

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

    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 Scenario
      Fully compatible with most industry OEM devices. Ideal for 100G telecom connections, data centers, high-performance computing networks, enterprise cores, distribution layers, etc.
    • 3. Protocols
      Compliant with IEEE 802.3bm, SFF-8636, and QSFP28 MSA standards.
    • 4. Quality Certifications
      Backed by CE, FCC, ROSH, ISO9001.

    Applications

    Scenario 1: 100G Switch to 100G Switch Direct Connectivity

    QT-QSFP28-ER4 Scenario 1 100G Switch to 100G Switch Direct Connectivity

      

     

    Scenario 2: 100G Switch to 100G NIC Direct Connectivity

    QT-QSFP28-ER4 Scenario 2 100G Switch to 100G NIC Direct Connectivity

    Product details

    Various Switch Tests

     

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

     

     

     

    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

     

     

    Comprehensive Testing

     

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

     

    QSFP28 ER4 performance Test in various devices

     

     

    100G QSFP28 Model Contrast Table

            

    Part Number

    QT-QSFP28-SR4

    QT-QSFP28-PSM4

    QT-QSFP28-IR4

    QT-QSFP28-LR4

    QT-QSFP28-CWDM-LR4

    QT-QSFP28-ER4 (Rx SOA)

    QT-QSFP28-ZR4

    Image

    Wavelength

    850nm

    1310nm

    1271~1331nm

    1310nm

    1271~1331nm

    1310nm

    1310nm

    Max Distance

    100m

    500m

    2km

    10km

    10km

    40km

    80km

    Cable Type

    OM3/OM4 MMF

    OS2 SMF

    OS2 SMF

    OS2 SMF

    OS2 SMF

    OS2 SMF

    OS2 SMF

    Connector

    MPO/MTP-12

    MPO/MTP-12

    LC Duplex

    LC Duplex

    LC Duplex

    LC Duplex

    LC Duplex

    Tx Power(dBm)

    -8.4~+2.4

    -9.4~+2

    -6.5~+2.5

    -4.3~+4.5

    -6.5~+2.5

    -2.9~+4.5

    +2~+7

    Rx Sensitivity(dBm)

    -10.3

    -12.66

    -11.5

    -10.6

    -11.5

    -20.9

    -27

    Max Power Consumption

    2.5W

    3.5W

    3.5W

    4W

    3.5W

    5W

    5.5W

    Source

    VCSEL+PIN

    DFB+PIN

    CWDM DFB+ PIN

    EML+PIN

    CWDM DFB +PIN

    4x EML+SOA+PIN

    EML+SOA+PIN

    Operating Temperature

    0~70°C

    0~70°C

    0~70°C

    0~70°C

    -40~85°C (Available)

    0~70°C

    0~70°C

    -20~85°C (Available)

    0~70°C

    -40~85°C (Available)

     

    Questions & Answers

    • ALL (26)

    Customer Reviews

    Write a Review
    Sign in to write a review
    Write a Review

    5 stars

    4 Reviews

    4 stars

    1 Reviews

    3 stars

    0 Reviews

    2 stars

    0 Reviews

    1 stars

    0 Reviews

    Reviews with images

    See all photos

    Read reviews that mention

    • ALL (5)
    • Customer Support (1)
    • Excellent Quality (1)
    • Good Price (2)
    • Good Packaging (1)
    • High Reliability (1)
    • Compatibility (4)
    • Fast Delivery (1)
    • High Performance (1)
    • Desmond United States of America
      2025-11-21

      I've been using the 100G ER4 transceiver for our metro-distance DCI setup, and overall it performs very well. The link has stayed stable with no noticeable signal drops, even around the 40 km range. My only minor complaint is that the module runs a bit warmer than expected, but nothing problematic. For the price and performance, it's a solid choice.

      Transceivers typeQSFP-100G-ER4L (EXT)

      CompatibleCisco

      Verified Purchase

      Helpful

      0

    • Theodore United States of America
      2025-11-07

      Received the 100G ER4 modules last week, excellent quality and perfectly compatible with our Cisco switches. The transmission over 40km is rock solid with no packet loss. Customer support from QSFPTEK was professional and responsive. Great price-performance ratio!

      Transceivers typeQSFP-100G-ER4L (EXT)

      CompatibleCisco

      Verified Purchase

      Helpful

      0

    • Len United States of America
      2025-09-12

      I ordered the 100G ER4 module from QSFPTEK for our campus interconnect project. The module feels well-built, plug and play, and worked flawlessly with our switches. Transmission over long distances is stable with low BER, and the customer service team guided me through the setup with very professional advice. Very satisfied and will definitely return for more.

      Transceivers typeQSFP-100G-ER4L (EXT)

      CompatibleCisco

      Verified Purchase

      Helpful

      0

    • Stewart United States of America
      2025-08-29

      I ordered the 100G ER4 module from this site and was very satisfied with the overall experience. The product arrived quickly with solid packaging, and it works flawlessly in my network. Compatibility was a major concern for me, but this module integrated perfectly with my existing switches. The pricing is also very competitive compared to other vendors I’ve checked. Highly recommend both the product and the service.

      Transceivers typeQSFP-100G-ER4L (EXT)

      CompatibleCisco

      Verified Purchase

      Helpful

      0

    • Seamas United States of America
      2025-08-15

      Just got our 100G ER4 module delivered—super fast shipping and great packaging! Plugged it into our backbone, and it's plug and play. No compatibility issues, top-notch quality, and the price was way better than most vendors I checked.

      Transceivers typeQSFP-100G-ER4L (EXT)

      CompatibleCisco

      Verified Purchase

      Helpful

      0

    Resources

    • PDF Document
      QT-QSFP28-ER4-EXD Datasheet.pdf
    • PDF Document
      Transceiver Module User Guide.pdf
    Check Test Reports on Target Device
    Contact us
    Write a Review
    Cisco QSFP-100G-ER4L Compatible 100GBASE-ER4L QSFP28 1310nm 40km LC Duplex SMF DDM Optical Transceiver Module (Extended Temperature)

    Compatible Cisco

    Transceivers type QSFP-100G-ER4L (EXT)

    * Review
    0/1000
    Allow files type of JPG, PNG, MP4. Maximum file size: 5MB

    Maximum size: 5MB

    Satisfaction
    Customer Gallery
    View All Customer Gallery

    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!

    Verified Purchase

    Helpful

    8

    Sign in to vote
    Added to Cart
    Cisco QSFP-100G-ER4L Compatible 100GBASE-ER4L QSFP28 1310nm 40km LC Duplex SMF DDM Optical Transceiver Module (Extended Temperature)
    US$ 1,799.00
    Compatible
    Cisco
    Transceivers type
    QSFP-100G-ER4L (EXT)
    Quantity
    Subtotal
    View Cart
    Check Out
    Continue shopping

    Confirmation

    Successfully added shopping cart

    Bulk Order Quotes
    Cisco QSFP-100G-ER4L Compatible 100GBASE-ER4L QSFP28 1310nm 40km LC Duplex SMF DDM Optical Transceiver Module (Extended Temperature)

    Compatible Cisco

    Transceivers type QSFP-100G-ER4L (EXT)

  • Qty:

  • Name:

  • E-mail:

  • Country