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    Products / Transceivers / 400G/800G/1.6T Ethernet Transceivers / 400G QSFP112 / 203305
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    Cisco QSFP-400G-VR4 Compatible 400GBASE-VR4 QSFP112 RHS/Flat Top PAM4 850nm 50m DOM MPO-12/APC MMF Ethernet Optical Transceiver Module

    Product No: 203305
    0 Reviews
    12 Sold
    $459.00
    Compatible
    Transceivers type
    8 in real-time stock, 14Nov, 2026

    Free Shipping over US$ 79.8

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    5-Year Warranty 1-Year 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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    1. Used in ConnectX-7/QSFP112 adapters or BlueField-3/QSFP112 DPUs
2. Built-in Broadcom DSP chip
3. Used for AI Data Centers and HPCs
4. Max power consumption ≤8.5W
5. Compliant with QSFP112 MSA Specification Rev2.0, IEEE 802.3df-2024 and CMIS Rev5.0
    See more

    Specifications

    Cisco QSFP-400G-VR4 Compatible 400GBASE-VR4 QSFP112 PAM4 Optical Transceiver Module (850nm, 50m, MPO-12 APC Connectors, MMF, 0℃ to +70℃, DOM)

     

    The Cisco QSFP-400G-VR4 Compatible 400GBASE-VR4 QSFP112 transceiver module is used in ConnectX-7/QSFP112 adapters or BlueField-3/QSFP112 DPUs. It enables the fiber link of 50m over MMF with MPO-12 APC connectors. The 400G VR4 QSFP112 is widely used for 400 gigabit Ethernet, 800G to 2x 400GBASE-SR4 breakout, AI Data Centers and HPCs applications. QSFPTEK manufactured 400GBASE-VR4 QSFP112 complies with QSFP112 MSA Specification Rev2.0, IEEE 802.3df-2024 and CMIS Rev5.0. DOM function is supported on the 400G fiber optic transceiver to achieve real-time operating parameters monitoring. Adopting the Pulse-amplitude Modulation (PAM4) modulation, the VR4 QSFP112 achieves 400 Gigabit Ethernet through 4x 106.25 PAM4 Retimed 4x100GAUI-1/2x200GAUI-2/1x400GAUI-4 C2M electrical interface.

     

    Part Number QT-Q112-400G-SR4 Vendor Name QSFPTEK
    Form Factor QSFP112 Max Data Rate 425 Gbps (4x 106.25 Gbps)
    Wavelength 850nm Distance 50m
    Connector MPO-12/APC Cable Type MMF
    Transmitter Type VCSEL Receiver Type PIN PD
    TX Power -4.6 to +4dBm Receiver Sensitivity < -6.3dBm
    Packaging Technology COB (Chip on Board) Packaging Receiver Overload 4 dBm
    Power Consumption ≤8.5W Modulation Format PAM4
    DDM/DOM Supported Temperature 0 to 70°C (32 to 158°F)
    Protocols QSFP112 MSA Specification Rev2.0, IEEE 802.3df-2024 and CMIS Rev5.0 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

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    $459.00
    219 Sold
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    Applications

     Scenario 1: Twin-port 2x400G OSFP EN Switch to 2x 400G ConnectX-7/QSFP112 or BlueField-3/QSFP112 DPUs Connectivity

    Twin-port 2x400G OSFP EN Switch to 2x 400G ConnectX-7/QSFP112 or BlueField-3/QSFP112 DPUs Connectivity

     

     

     Scenario 2: Twin-port 2x400G OSFP EN Switch to 4x 200G ConnectX-7/QSFP112 or BlueField-3/QSFP112 DPUs Connectivity

    Twin-port 2x400G OSFP EN Switch to 4x 200G ConnectX-7/QSFP112 or BlueField-3/QSFP112 DPUs 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.

     

     

     

      400G QSFP112 Optical Transceivers Contrast Table

     

    Part Number

    QT-Q112-400G-SR4

    QT-Q112-400G-DR4

    QT-Q112-400G-DR4+

    QT-Q112-400G-FR4

    Image

    NVIDIA Part Number

    MMA1Z00-NS400

    MMS1X00-NS400

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    —

    Data Rate

    400Gb/s

    400Gb/s

    400Gb/s

    400Gb/s

    Optical Connector

    MPO-12/APC

    MPO-12/APC

    MPO-12/APC

    Duplex LC/UPC

    Cable Type

    MTP/MPO-12/APC OM4 MMF

    MTP/MPO-12/APC OS2 SMF

    MTP/MPO-12/APC OS2 SMF

    LC UPC Duplex OS2 SMF

    Wavelength

    850nm

    1310nm

    1310nm

    1310nm

    Reach

    30m@OM3

    50m@OM4

    500m

    2 KM

    2 KM

    Modulation

    4x 100G-PAM4 Electrical to 4x 100G-PAM4 Optical Parallel

    4x 100G-PAM4 Electrical to 4x 100G-PAM4 Optical Parallel

    4x 100G-PAM4 Electrical to 4x 100G-PAM4 Optical Parallel

    4x 100G-PAM4 Electrical to 4x 100G-PAM4 Optical Parallel

    Max Power Consumption

    9W

    10W

    10W

    10W

    Matching 800G Transceivers

    MMA4Z00-NS (Finned top)

    MMS4X00-NM (Finned top)

    OSFP800-XDR8-B2

    MMS4X50-NM (Finned top)

    Application

    800G-to-two 400G Links

    800G-to-four 200G Links

    800G-to-two 400G Links

    800G-to-four 200G Links

    800G-to-two 400G Links

    800G-to-two 400G Links


    Questions & Answers

    • All (9)
    • QT-Q112-400G-SR4 (4)
    • QT-Q112-400G-DR4 (4)
    • QT-Q112-400G-DR4+ (4)
    • QT-Q112-400G-FR4 (3)
    • What does QSFP112 mean?
      A 400G QSFP uses 4 x 100Gb/s PAM-4 elec lanes. "112" refers to the the max data rate (112Gb/s) each electrical interface can handle.
    • Can I use the QSFP112 optical transceivers in OSFP switches?
      You cannot directly use QSFP112 module in OSFP switch, because QSFP112 and OSFP are physically different, incompatible form factors.
    • Can 400G QSFP112 SR4 module be used as 200G?
      Yes, it can be used as 200G module.

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    Resources

    • PDF Document
      QT-Q112-400G-SR4 Datasheet.pdf
    Check Test Reports on Target Device
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    Product image
    Cisco QSFP-400G-VR4 Compatible 400GBASE-VR4 QSFP112 RHS/Flat Top PAM4 850nm 50m DOM MPO-12/APC MMF Ethernet Optical Transceiver Module

    Compatible Cisco

    Transceivers type QSFP-400G-VR4 | 50m | MPO-12/APC

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    Satisfaction
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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!

    Verified Purchase

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    Cisco QSFP-400G-VR4 Compatible 400GBASE-VR4 QSFP112 RHS/Flat Top PAM4 850nm 50m DOM MPO-12/APC MMF Ethernet Optical Transceiver Module
    $459.00
    Compatible
    Cisco
    Transceivers type
    QSFP-400G-VR4 | 50m | MPO-12/APC
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    Product image
    Cisco QSFP-400G-VR4 Compatible 400GBASE-VR4 QSFP112 RHS/Flat Top PAM4 850nm 50m DOM MPO-12/APC MMF Ethernet Optical Transceiver Module

    Compatible Cisco

    Transceivers type QSFP-400G-VR4 | 50m | MPO-12/APC

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