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    FS.com
    An AI Overview is not available for this searchCan't generate an AI overview right now. Try again later.
    AI Overview
    The 50G QSFP ER4 40KM optical transceiver is designed for long-distance 50Gb/s data transmission up to 40km over single-mode fiber (SMF) using LC duplex connectors. These modules use PAM4 modulation and integrated Clock-Data-Recovery (CDR) for high-speed 5G mid-haul and data center interconnects. 
    Key Features & Technical Specifications 
    • Data Rate: 50Gb/s (often supporting 53.13 Gbit/s for 50GBASE-ER).
    • Distance: Up to 40 km over single-mode fiber (SMF).
    • Wavelength: Typically 1310nm or 4-wavelength LWDM.
    • Connector: LC Duplex.
    • Modulation: PAM4.
    • Diagnostics: Supports Digital Diagnostics Monitoring (DDM/DOM).
    • Form Factor: QSFP28 (Quad Small Form-factor Pluggable 28). 
    Applications 
    • 5G Network Mid-haul and Backhaul.
    • High-speed Data Center Interconnects (DCI).
    • 40km long-reach Ethernet links. 
    Typical Configurations 
    • Transceiver Type: 50GBASE-ER PAM4.
    • Connector Type: LC-Duplex.
    • Manufacturer Example: Custom 50G QSFP ER4 Manufacturers offer specialized long-distance optical modules.
    • Vendor Solutions: 50G QSFP28/SFP56 Modules from FS.com. 
    Important Deployment Notes 
    • Attenuation: Because these are high-power, long-reach (ER4) modules, connecting them directly back-to-back over short distances requires optical attenuators to prevent receiver saturation or damage.
    • Compatibility: They comply with 50GBASE-ER standards, but verify compatibility with network switch vendors (e.g., Cisco, Juniper, Arista). 
    • 50G Optical Transceiver - Fiberwdm.com
      * Optical Transport Network. Semi-Active WDM System. * Passive Component. * Optical Transceivers. * Optical Amplifier. * Fiber Opt...
      Guangzhou Ruid Ele-tech CO., LTD.
    • 40km ER4 QSFP+ are they hard to get working or is it just me?
      Mar 27, 2019 — ER4 Attenuation: Connecting ER4 QSFP+ modules back-to-back or over short distances without attenuation can damage or saturate the ...
      Reddit
    • 50G QSFP28 ER PAM4 1310nm 40km 50G Transceiver - HeyOptics
      50GBASE-ER QSFP28 PAM4 Transceiver Module (SMF, 1310nm, 40km, LC, DOM). Features: Universal QSFP28 Transceiver For 50GBASE-ER Ethe...
      HeyOptics
    • 50G QSFP28/SFP56 Optical Transceiver Modules - FS.com
      FS 50G QSFP28, SFP56 optical module solution used for high-density switching, routing and data center applications. Click to get y...
      FS.com
    • 100G QSFP28 ER4 Lite: 40km Long-Reach Data Center ...
      Nov 17, 2025 — welcome to Fiber Mall's 100G QSFB28 ER4 light optical transceiver. video this module is designed for 40 km optical communication a...
      2m
      YouTube·FiberMall
    • Custom 50G QSFP ER4 40KM Optical transceiver manufacturer,50G ...
      50G QSFP ER4 optical transceiver module, support 50Gb/s and up to 40 km transmission on SM fiber, it works in high-speed IDC conne...
      www.fiberwdm.com
    • QSFP-50G-ER-SM1311 H3C® compatible QSFP28 100GBase ...
      ATGBICS H3C® compatible QSFP-50G-ER-SM1311 QSFP28 100GBase-ER4 form factor network transceiver supports a distance of up to 40km o...
      atgbics.com
    • 50G Optical Transceiver - Fiberwdm.com
      * Optical Transport Network. Semi-Active WDM System. * Passive Component. * Optical Transceivers. * Optical Amplifier. * Fiber Opt...
      Guangzhou Ruid Ele-tech CO., LTD.
    • 40km ER4 QSFP+ are they hard to get working or is it just me?
      Mar 27, 2019 — ER4 Attenuation: Connecting ER4 QSFP+ modules back-to-back or over short distances without attenuation can damage or saturate the ...
      Reddit
    • 50G QSFP28 ER PAM4 1310nm 40km 50G Transceiver - HeyOptics
      50GBASE-ER QSFP28 PAM4 Transceiver Module (SMF, 1310nm, 40km, LC, DOM). Features: Universal QSFP28 Transceiver For 50GBASE-ER Ethe...
      HeyOptics
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    Web results

    50G QSFP+ ER4 40Km 1310nm LC Optical Transceiver


    Guangzhou Ruid Ele-tech CO., LTD.
    https://www.fiberwdm.com › 50g-qsfp-er4-40km-1310...
    Guangzhou Ruid Ele-tech CO., LTD.
    https://www.fiberwdm.com › 50g-qsfp-er4-40km-1310...
    50G QSFP ER4 optical transceiver module, support 50Gb/s and up to 40 km transmission on SM fiber, it works in high-speed IDC connection solutions.Read more
    50G QSFP ER4 40KM Optical transceiver from www.fiberwdm.com

    QSFP-50G-ER-SM1311 Compatible Transceiver for 100G ...


    YuJa
    https://ucr.yuja.com › Libraries › pannellum › pannellum
    YuJa
    https://ucr.yuja.com › Libraries › pannellum › pannellum
    Key specifications include: 100GBase-ER4 speed, 40km transmission distance, and LC Duplex connector. The transceiver also features a DOM for real-time ...Read more
    50G QSFP ER4 40KM Optical transceiver from ucr.yuja.com
    $130.99

    QSFP-50G-ER-SM1311 H3C® compatible QSFP28 100GBase


    ATGBICS
    https://atgbics.com › products › qsfp-50g-er-sm1311-h...
    ATGBICS
    https://atgbics.com › products › qsfp-50g-er-sm1311-h...
    ATGBICS H3C® compatible QSFP-50G-ER-SM1311 QSFP28 100GBase-ER4 form factor network transceiver supports a distance of up to 40km over single-mode fibre ...

    Custom 50G QSFP ER4 40KM Optical transceiver manufacturer ...


    Guangzhou Ruid Ele-tech CO., LTD.
    https://www.fiberwdm.com › sfp-40km-transceiver_sp
    Guangzhou Ruid Ele-tech CO., LTD.
    https://www.fiberwdm.com › sfp-40km-transceiver_sp
    50G QSFP ER4 optical transceiver module, support 50Gb/s and up to 40 km transmission on SM fiber, it works in high-speed IDC connection solutions, 5G network ...

    40km ER4 QSFP+ are they hard to get working or is it just ...


    Reddit · r/networking
    10+ comments · 7 years ago
    Reddit · r/networking
    10+ comments · 7 years ago
    I am trying to test out some FS.com QSFP+ 40g ER4 40km in some Juniper ACX5k boxes. Out of 4 modules I can't get any to work with just a patch cable back-to- ...Read more

    FS QSFP-ER4-40G 40GBASE-ER4 40G QSFP+ Transceiver


    FS.com
    https://www.fs.com › ... › 40G QSFP+
    FS.com
    https://www.fs.com › ... › 40G QSFP+
    The QSFP+ module is designed for use in 40GBASE Ethernet throughput up to 40km over single mode fiber (SMF) using a wavelength of 1310nm via duplex LC ...Read more
    50G QSFP ER4 40KM Optical transceiver from www.fs.com
    $1,109.00 · 4.8(172) · 2–7 day delivery · Free 30-day returns
    Missing: 50G ‎| Show results with: 50G

    Customized 40GBASE-ER4 QSFP+ 1310nm 40km Optical ...


    QSFPTEK
    https://www.qsfptek.com › product
    QSFPTEK
    https://www.qsfptek.com › product
    Customized 40GBASE-ER4 QSFP+ optical transceiver provides 40G links up to 40km over OS2 at 1310nm using LC Duplex interface. Best choice for Metropolitan ...
    50G QSFP ER4 40KM Optical transceiver from www.qsfptek.com
    $419.00 · Free delivery over $79.80 · 30-day returns

    Transceiver


    Starview Technologies
    https://starviewtech.net › uploads › 2024/08 › tra...
    Starview Technologies
    https://starviewtech.net › uploads › 2024/08 › tra...
    PDF
    LWDM10/40km. SR4 100m. LR4 10/20km. ER4 40km. ZR4 80km. Single Lambda. 1x 106.25Gbps. DR 500m. FR 2km. LR 10km. CWDM LR 10km. 4x53.125Gbps. PSR4 100m. FR4 2km.Read more

    PRE-QSFP-ER4 | Precision OT


    Precision Optical Technologies
    https://www.precisionot.com › product › pre-qsfp-er4
    Precision Optical Technologies
    https://www.precisionot.com › product › pre-qsfp-er4
    Precision OT's QSFP-ER4 optical transceiver supports 40G Ethernet applications up to 40 kilometers over single mode fiber (SMF). This transceiver is ideal ...Read more
    50G QSFP ER4 40KM Optical transceiver from www.precisionot.com
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    Web results

    100G QSFP28 ER4 & ER4L Optical Transceivers


    Proficium.com
    https://proficium.com › collections › 100g-qsfp28-er4-...
    Proficium.com
    https://proficium.com › collections › 100g-qsfp28-er4-...
    Shop 100G QSFP28 ER4 & ER4L optical transceivers for SMF 1310nm 40km reach. Compatible with Arista, Cisco, Dell & MSA. Buy now on Proficium.com!
    50G QSFP ER4 40KM Optical transceiver from proficium.com
    People also ask
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    What is the range of QSFP LR4?
    The SO-QSFP-LR4 converts 4x 10 Gbps flows into four CWDM channels in the 1300nm band up to 10 km over a SingleMode (SM) fiber.

    SO-QSFP-LR4 | Smartoptics


    Smartoptics
    https://smartoptics.com › wp-content › uploads › 2022/12
    Smartoptics
    https://smartoptics.com › wp-content › uploads › 2022/12
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