need help

Chat live with US

Live Chat

Send us a message

Email Now

Want a call?

+1 (877) 205 5306
United States - USD


United States


Your Shopping Cart is Empty.
Juniper Networks QSFP-40G-ER4 Compatible 40GBASE-ER4 QSFP+ 1310nm 40km DOM Transceiver Module
Tap Click image to expand

Juniper Networks QSFP-40G-ER4 Compatible 40GBASE-ER4 QSFP+ 1310nm 40km DOM Transceiver Module


QSFP+ transceiver module is individually tested on a full range of Juniper Networks equipment and passes the monitoring of FS.COM intelligent quality control system.

Juniper Networks QSFP-40G-ER4 Compatible 40GBASE-ER4 QSFP+ 1310nm 40km DOM Transceiver Module

Juniper Networks QSFP-40G-ER4 Compatible 40GBASE-ER4 QSFP+ 1310nm 40km DOM Transceiver Module

139 reviews Need Help?
  • Description
  • Download
  • Recommendation
  • Q&A
139 reviews
volume pricing share need help?
US$  1,500.00
165 pcs in U.S. Warehouse

pcs in EU Warehouse


pcs in CN Warehouse

, Ship Today
We are always devoted to offering the fastest delivery with multi-warehouse system. Learn more about our shipping policy.

Please select an option for each attribute in black.

Please choose a brand.


Juniper Networks QSFP-40G-ER4 Compatible 40GBASE-ER4 QSFP+ Transceiver Module (SMF, 1310nm, 40km, LC, DOM)

Product Details

Juniper Networks Genuine QSFP-40G-ER4 Vendor Name FS.COM
Form Type QSFP+ Max Data Rate 40Gbps
Wavelength 1310nm Max Cable Distance* 40km**
Interface LC duplex Optical Components DFB CWDM
Cable Type SMF DOM Support Yes
CDR Support Yes Protocols OTN OTU3, 40G Ethernet, Infiniband, Fiber Channel, SATA/SAS3, MSA Compliant
TX Power -3.7~+4.5dBm Receiver Sensitivity <-20.2dBm
Commercial Temperature Range 0 to 70°C (32 to 158°F) HTS-Harmonized Code 8517706000
*Minimum cabling distance is 2 meters for -LR4 and -ER4 according to the IEEE 802.3 standard.
** Links longer than 30 km for the same link power budget are considered engineered links as per IEEE 802.3 Table 87–6. Depending upon link architecture, attenuation may be required to guarantee operation.

Quality Certification

Quality and standards are the foundation of FS.COM. We are dedicated to providing customers with outstanding, standards-compliant products and services. FS.COM has passed many quality system verifications, like CE, RoHS, FCC, established an internationally standardized quality assurance system and strictly implemented standardized management and control in the course of design, development, production, installation and service.

Please Note: Installing a third party transceiver does not void your network equipment warranty. Network equipment manufacturers all have guidelines stating that warranty support on their products will not be affected.

Lifetime Warranty

All the fiber optic products in FS.COM are fully warranted against defects in material and workmanship with a lifetime guarantee. This warranty does not cover damage caused by accident, improper care, improper use, negligence, normal wear and tear, or the natural breakdown of colors and materials over extended time and use.

  • This product provides the lifetime warranty ,which aims to reflect our greatest sincerity. Please contact us to learn more.
  • This product is in conformity with ISO9001. This system is valid to a company engaging in development, production and supply service of fiber optical products. Please contact us to learn more.
  • This product is free of lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls and phthalates. Please contact us to learn more.
  • This product was produced under the requirements of CE to indicate conformity with the essential health and safety. Please contact us to learn more.
  • This product fully accords with the FCC, which aims to manage the radio wave and magnetic fields more reasonably. Please contact us to learn more.
  • FDA is responsible for regulating radiation-emitting electronic products. To protect the public from hazardous and unnecessary exposure to radiation from electronic products. Please contact us to learn more.

Quality Control System:


Juniper MX960 (Module: MIC3-3D-2X40GE-QSFPP)

Juniper EX4300-48P

Platform Support

Juniper JNP-QSFP-4X10GE-LR is supported on a wide range of Juniper Networks equipment.

FS.COM S5850-32S2Q Switch OCX1100 QFX10000 FS.COM S5850-48S2Q4C Switch QFX3600 FS.COM S5850-48S6Q Switch QFX3500
QFX5200EX4600EX4300Juniper Networks QFX5100-24Q-3AFIQFX5200

Packaging & Labeling

Package option: 4 units in a carton box with visual plastic window or 1 unit in a transparent tray box, which has been labelled and marked by FS.COM as default. Customized label or package solutions are available as request, please contact us at [email protected] .

OEM & Customs

Partnering with a variety of world class OEM manufacturers for over 8 years, FS.COM is able to provide customized high-quality and cost-effective solutions for all needs and specifications, including optical design, mechanical design, Printed Circuit Board (PCB) layout and electrical design, software & firmware design, integrated assembly, specific labels, etc. With surging sales and favorable customer feedback, FS.COM has been expanding rapidly across the world and is becoming the leading provider of the optical communication industry. If any interesting, please contact our Tech Support: [email protected], or Sales Team: [email protected] .


FS.COM offers global shipping to over 190 countries around the world from the warehouse in the USA, Germany and China via FedEx, UPS, DHL, TNT, EMS or a customer-arranged carrier. Items are often shipped the same day (some transceivers can be out the door in 20 minutes). If we have no stock in any of our global warehouses, the shipment will be delayed for 1-2 days. FS.COM multiple-warehouse system makes sure the fastest delivery.
Questions & Answers

Ask a question

  • Q:

    What kinds of custom choices are offered in FS.COM? By Glasscock on July 15, 2017


    As for customized transceivers, FS.COM offers regular custom choices such as compatibility, transmission distance, operating temperature, label pattern, label colors and etc. What's more, FS.COM welcomes any inquiry for customized products and solutions for all need and specifications. By FS.COM on July 15, 2017

  • Q:

    Why should I trust FS.COM compatible transceivers? By Soza on June 07, 2017


    Besides the price advantage we have compared to branded transceivers, FS.COM compatible transceivers also maintain the same performance and reliability. To satisfy our customers' needs of high performance, all of our transceivers are tested multiple times in mainstream original brand switches in our test center before shipped out. By FS.COM on June 07, 2017

  • Q:

    What are the differences between MTP/MPO interface and LC interface 40G QSFP+ transceivers? By Hawkes on June 05, 2017


    On one hand, the FS.COM 40G QSFP+ transceivers with LC interface are used for long-distance transmission over single mode fiber, and those with MTP/MPO interface are utilized for short distance transmission over multimode fiber. On the other hand, for the FS.COM 40G QSFP+ transceivers with LC interface, they cannot be split into 4x10G as they use 4 wavelengths on a pair of single-mode fibers and do not lend themselves to “splitting” into 4 pairs without substantial complexity to split out the wavelengths. For the FS,COM 40G QSFP+ transceivers with MTP/MPO interface, they can be used in 4x10G connectivity via an external 12-fiber parallel to 2-fiber duplex breakout cable, which connects the 40G transceiver to four 10G optical interfaces. By FS.COM on June 05, 2017

Customer Reviews Write a Review
  • 4.8

    see all 139 reviews

  • 5 Stars
    4 Stars
    3 Stars
    2 Stars
    1 Stars