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    Home / Products / Transceivers / NVIDIA InfiniBand Transceivers / 400G OSFP/QSFP112 InfiniBand NDR / 103836

    NVIDIA/Mellanox Compatible 400GBASE-FR4 QSFP112 RHS/Flat Top PAM4 1310nm 2km DDM Duplex LC/UPC SMF Optical Transceiver Module Support both Ethernet and InfiniBand NDR Used in ConnectX-7 HCA

    Product No: 103836
    4 Reviews
    16 Sold
    US$ 599.00
    Compatible
    Transceivers type
    7 in real-time stock, 12 Sep, 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.
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    Exchanges caused by the customer's reasons will not be accepted.
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    1. Support both InfiniBand NDR (IB) and Ethernet (ETH)
2. Support 800G to 2x 400G breakout applications
3. Built-in Broadcom DSP chip
4. Max power consumption ≤10W
5. EML transmitter and PIN PD receiver
    See more

    Specifications

    NVIDIA/Mellanox Compatible 400G QSFP112 FR4 InfiniBand NDR Optical Transceiver Module (1310nm, 2km, Duplex LC/UPC Connector, SMF, 0℃ to +70℃, DDM)

     

    The NVIDIA/Mellanox Compatible 400GBASE-FR4 QSFP112 transceiver module supports a max data rate of 425Gbps. It enables the fiber link of 2km over SMF with duplex LC/UPC connectors. QSFPTEK manufactured 400GBASE-FR4 QSFP112 complies with 400G InfiniBand NDR, QSFP112 MSA Rev2.0, 400GBASE-FR4 (IEEE802.3cu), IEEE 802.3ck and CMIS Rev5.0. DDM function is supported on the 400G fiber optic transceiver to achieve real-time operating parameters monitoring. Adopting the Pulse-amplitude Modulation (PAM4) electrical and optical modulation, the FR4 QSFP112 achieves 400 Gigabit Ethernet through 4-channels of 100G-PAM4. The 400G FR4 QSFP112 is widely used for 400 gigabit Ethernet, 800G to 2x 400GBASE-FR4 breakout, data center and InfiniBand NDR applications.

     

    This 400G FR4 QSFP112 supports both InfiniBand NDR (IB) and Ethernet (ETH). While not for use in switches, it is designed for insertion into 400Gb/s ConnectX-7/QSFP112-based PCIe-bus network cards to twin-port 800G transceivers in 2x400G IB/EN switches. 

     

    Part Number QT-Q112-400G-FR4 Vendor Name QSFPTEK
    Form Factor Single-port QSFP112-RHS/Flat Top Max Data Rate 425 Gbps (4x 106.25 Gbps)
    Wavelength 1271nm, 1291nm, 1311nm, 1331nm Distance 2
    Connector Duplex LC UPC Cable Type SMF
    Transmitter Type EML Receiver Type PIN PD
    TX Power -3.2 to +4.4dBm Receiver Sensitivity < -7.2dBm
    Packaging Technology COB (Chip on Board) Packaging Receiver Overload 4.4 dBm
    Power Consumption ≤10W Modulation Format 4x 100G-PAM4 electrical to 4x 100G-PAM4 optical CWDM4 Serial Multiplexed
    Extinction Ratio >3.5dB CDR (Clock and Data Recovery) TX and RX Built-in CDR
    Application ConnectX-7/QSFP112 Adapters or BlueField-3/QSFP112 DPUs MTBF 1×10⁻¹² (@25℃/40℃/50℃, Full Load)
    DDM/DOM Supported Temperature 0 to 70°C (32 to 158°F)
    Protocols QSFP112 MSA Specification Rev2.0, IEEE 802.3ck 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

    Features

    • 1. Advanced Technology
      Features with PAM4 modulation technology, DSP chip and COB packaging technology.
    • 2. Best Price and High Quality
      Based on self-producing capacity and rigorous testing, QSFPTEK can provide cost-effective products with high reliability and performance at a trade price.
    • 3. Protocols
      Compliant with 400G InfiniBand NDR, QSFP112 MSA Rev2.0, 400GBASE-FR4 (IEEE802.3cu), IEEE 802.3ck and CMIS Rev5.0.
    • 4. Quality Certifications
      Backed by CE, FCC, ROSH, ISO9001.

    Applications

    Scenario 1: Twin-port 800G (2x400G) OSFP IB/EN Switch to 2x400G ConnectX-7 and/or BlueField-3

    Twin-port 800G (2x400G) OSFP IB/EN Switch to 2x400G ConnectX-7 and/or BlueField-3

    Product details

     

    Undergoes Comprehensive Performance Testing to Guarantee Optimal Reliability

     

    The QSFPTEK test center conducts complete testing procedures with advanced professional test equipment, including BER test, eye diagram test, Optical Spectrum test, jitter test, etc. Each module has been stringently tested by world-class test devices from Keysight and Anritsu to guarantee flawless operation and optimal reliability.

     

    Performance test devices  

     

    Questions & Answers

    • ALL (13)
    • QT-OSFP-400G-DR4-RHS (1)
    • QT-OSFP-400G-SR4-Flat (1)
    • 400G InfiniBand NDR (3)
    • QT-OSFP-400G-SR4 (2)
    • QT-OSFP-400G-DR4 (1)
    • QT-OSFP-400G-SR4-RHS (1)
    • QT-OSFP-400G-FR4 (1)

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    • ALL (4)
    • Compatibility (3)
    • High Performance (1)
    • Pearl Gus United States of America
      2026-08-18

      I bought these for a smaller 400G rollout rather than a full network replacement. They did what we needed without adding extra complexity, and the rollout stayed on schedule.

      Transceivers type QSFP112 FR4 | 2km | Single Duplex LC/UPC | Flat Top

      CompatibleNVIDIA/Mellanox (InfiniBand/Ethernet)

      Verified Purchase

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    • Kevin Mary United States of America
      2026-08-13

      The first thing we noticed was how cleanly it fit into our deployment workflow. There was little adjustment needed from the engineering side, and the testing phase moved along without taking up extra time.

      Transceivers type QSFP112 FR4 | 2km | Single Duplex LC/UPC | Flat Top

      CompatibleNVIDIA/Mellanox (InfiniBand/Ethernet)

      Verified Purchase

      Helpful

      0

    • sophy chy Italy
      2026-08-06

      These 400G FR4 transceivers worked perfectly with our NVIDIA ConnectX-7 adapters. The modules were recognized immediately and delivered stable high-speed connectivity for our AI network deployment.

      Transceivers type QSFP112 FR4 | 2km | Single Duplex LC/UPC | Flat Top

      CompatibleNVIDIA/Mellanox (InfiniBand/Ethernet)

      Verified Purchase

      Helpful

      0

    • Brandon United States of America
      2026-05-11

      A cost-effective alternative to the original NVIDIA/Mellanox optics. We tested this 400GBASE-FR4 module in our lab environment and found the performance and compatibility to be stable. It helped us reduce deployment costs without compromising our network requirements.

      Transceivers type QSFP112 FR4 | 2km | Single Duplex LC/UPC | Flat Top

      CompatibleNVIDIA/Mellanox (InfiniBand/Ethernet)

      Verified Purchase

      Helpful

      0

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      QT-Q112-400G-FR4 Datasheet.pdf
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    NVIDIA/Mellanox Compatible 400GBASE-FR4 QSFP112 RHS/Flat Top PAM4 1310nm 2km DDM Duplex LC/UPC SMF Optical Transceiver Module Support both Ethernet and InfiniBand NDR Used in ConnectX-7 HCA

    Compatible NVIDIA/Mellanox (InfiniBand/Ethernet)

    Transceivers type QSFP112 FR4 | 2km | Single Duplex LC/UPC | Flat Top

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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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    NVIDIA/Mellanox Compatible 400GBASE-FR4 QSFP112 RHS/Flat Top PAM4 1310nm 2km DDM Duplex LC/UPC SMF Optical Transceiver Module Support both Ethernet and InfiniBand NDR Used in ConnectX-7 HCA
    US$ 599.00
    Compatible
    NVIDIA/Mellanox (InfiniBand/Ethernet)
    Transceivers type
    QSFP112 FR4 | 2km | Single Duplex LC/UPC | Flat Top
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    Bulk Order Quotes
    NVIDIA/Mellanox Compatible 400GBASE-FR4 QSFP112 RHS/Flat Top PAM4 1310nm 2km DDM Duplex LC/UPC SMF Optical Transceiver Module Support both Ethernet and InfiniBand NDR Used in ConnectX-7 HCA

    Compatible NVIDIA/Mellanox (InfiniBand/Ethernet)

    Transceivers type QSFP112 FR4 | 2km | Single Duplex LC/UPC | Flat Top

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