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100G QSFP28 ER4 : A Reliable Choice for Long-Reach High-Speed Transmission

Posted on Jan-04-2026

100G QSFP28 ER4 optical module is an optical transceiver solution designed for long-distance, high-performance data communication. Housed in a standard QSFP28 form factor, it achieves transmission distances of up to 40 kilometers over single-mode fiber, perfectly addressing the core demands for high bandwidth and extended reach in scenarios such as Metropolitan Area Networks (MANs), Data Center Interconnects (DCI), and 5G backhaul.


Product Features:

100G-QSFP28-ER4-40KM-Transceiver●Compliant with QSFP28 Standard:SFF-8661 Rev 2.5, SFF-8636 Rev 2.10a

●High speed I/O electrical interface (CAUI-4) compliant with IEEE 802.3bm-2015

●Compliant with 100GBASE-ER4 Lite standard

●Single 3.3V Supply Voltage

●Maximum power consumption 5.5 W at 70ºC Case Operating Temperature

●LAN WDM EML laser and APD Receiver

●Universal QSFP28 MSA package with duplex LC connector

●Two Wire Serial Interface with Digital Diagnostic Monitoring

●Complies with EU Directive 2011/65/EU (RoHS compliant)

●Class 1 Laser


The key strengths of this module lie in its high performance and integration. It supports 4-channel full-duplex transmission, with each channel operating at speeds up to 25.78 Gbps, aggregating into a 100G high-speed link over a single fiber using Coarse Wavelength Division Multiplexing (CWDM) technology. With a typical power consumption of less than 4.5 watts and featuring Digital Diagnostic Monitoring (DDM), it enables real-time performance monitoring and troubleshooting, significantly enhancing network manageability and operational efficiency.


 Specification

Number

CL100GQSFPER4

VendorC-LIGHT
Form FactorQSFP28Data Rate Max

103.125Gbp

(4x 25.78Gbps)

Wavelength1310nmDistance

40km

ConnectorLCMediaSMF
Transmitter Type4 x LAN WDM EMLReceiver TypePIN
TX Power-2dBm~5dBmReceiver Sensitivity< 21dbm
Power Budget19dBmReceiver Overload< -4.5dBm
Power Consumption≤5.5WExtinction Ratio>8dB
DDM/DOMSupportedIndustrial Temperature Range0 to 70°C
CDRTX & RX Built-in CDRFEC FunctionNo
ProtocolsSFF-8661 Rev 2.5, SFF-8636 Rev 2.10a,QSFP28 MSA and IEEE 802.3bm-2015Warranty3 Years


In practical applications, the 100G QSFP28 ER4 is an ideal building block for constructing cost-effective, scalable long-haul network backbones. It is widely used in telecom operator networks, large-scale enterprise campus interconnections, and cloud service provider infrastructure. Providing stable and reliable connectivity for 100G Ethernet and OTN interfaces, it serves as a critical enabler for next-generation high-speed network architectures.


100G QSFP28 ER4

QSFP28 100G ER4 1310nm 40Km LC


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