40G QSFP+1310nm ER4 40km SMF Optical Transceiver

40G QSFP+ ER4 1310nm 40km SMF Optical Transceiver

40G QSFP+ ER4 1310nm 40km SMF Optical Transceiver

The 40G QSFP+ ER4 Optical Module is a hot-pluggable, quad-channel optical transceiver designed to deliver reliable 40 Gbps Ethernet connectivity over single-mode fiber links up to 40 km, making it ideal for data centers, metro transport, and telecom backbones . Engineered to IEEE 802.3ba/802.3bm standards and compliant with the QSFP+ MSA, it integrates seamlessly with leading switch and router platforms, ensuring interoperability and low-power operation at just 3.5 W maximum . With advanced digital diagnostics (DDM) via I²C, network operators can monitor real-time Tx/Rx power, temperature, and voltage metrics for proactive maintenance and uptime assurance .

Specifications

Part Number	GL40-SM31ER40C	Tx Power (dBm)	-2~3
Product	40G QSFP+ ER4	Sensitivity (dbm)	≤-20
Max Data Rate	40Gbps	Distance	40km
Wavelength	1295/1300 /1305/1310nm	Connector	Duplex LC/UPC
Laser Type (TX/RX)	DFB/APD	Temp	0~70 ℃

Application
Features

1.Metropolitan Area Networks (MANs)

2.Telecommunication Backbone Networks

3.High-Performance Computing (HPC) Clusters

4.Cloud Computing and Virtualization

5.Enterprise Campus Networks

Hot-swappable function: supports hot-swapping for easy maintenance and upgrading
QSFP+ MSA & IEEE Compliance，RoHS-6 & ISO 9001 Certified
High speed, high efficiency, long distance transmission
Maximum link length of 40km on single-mode fiber (SMF)
CWDM channel center wavelength: 1271nm, 1291nm, 1311nm, 1331nm
Low Power Consumption (≤ 3.5 W)
Operating temperature range: 0°C to +70°C

FAQ About 40G QSFP+ ER4

How can I buy 40G QSFP ER4 transceiver online?

You can purchase a 40G QSFP-ER4 transceiver online directly from reputable optics vendors such as Fibrecross, We deliver high-quality, high-speed modules backed by strong R&D, global certifications, and tailored OEM/ODM support—built for performance, built for trust.

What is the 40G QSFP ER4 1310nm single mode 40km wavelength and reach?

The 40G QSFP-ER4 operates at a center wavelength of 1310 nm over single-mode fiber (G.652) and supports link distances up to 40 km without intermediate amplification . This makes it ideal for core data center interconnects and metro applications requiring long-haul optical transmission . This makes it ideal for core data center interconnects and metro applications requiring long-haul optical transmission.

How do I ensure low power 40G QSFP ER4 module operation in thermal-sensitive environments?

The standard QSFP-ER4 module typically dissipates up to 3.5 W, but it supports an LPMode pin to further limit power consumption when enabled, reducing thermal load on the host system . Always verify vendor data sheets for “typical power dissipation” and engage LPMode in your switch or router configuration to guarantee lower-power operation .

How can I access the 40G QSFP ER4 digital diagnostics monitoring interface?

QSFP-ER4 modules implement a standardized I²C-based Digital Diagnostics Monitoring (DDM) interface defined by the QSFP+ MSA, exposing real-time parameters such as Tx/Rx power, temperature, supply voltage, and bias current . Use your host’s optics-management command set to query these DDM registers programmatically .

Do you test all your goods before delivery?

Yes,we have professional engineers to test all devices before shipping.Our product inspection also conforms to FCC/CE/RoHS