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40Gbps QSFP+ LR4 Parallel Single Mode Optical Transceiver

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Satisfactory return or item exchange | See details
Money back guarantee | See details
Limited Warranty | See details
Volume pricing:
If you need large order volume, please apply for a business account or contact us to enjoy preferential policies.



Quick Overview:
Lead time= 1-2 Weeks
40GBase-LR4, QDR, PSM, MTP Connector, SMF
Warranty: 1-Year

40Gbps QSFP+ LR4 Parallel Single Mode Optical Transceiver

Processing Time
Processes in 24 hours: Processing Time is guaranteed to be shorter.
Typical Processing Time: 1-2 weeks
Shipping Time
FedEx Overnight: Within 1-4 business days
DHL: Within 2-6 business days
EMS: Within 4-15 business days
UPS: Within 2-5 business days
Hong Kong Post Airmail: Within 10-30 business days
Payment Methods
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40Gbps QSFP+ LR4 Parallel Single Mode Optical Transceiver
10Gtek's QSFP+ transceiver modules are designed for use in 40 Gigabit Ethernet links over single mode fiber. They are compliant with the QSFP+ MSA and IEEE 802.3ba 40GBASE-LR4. Digital diagnostics functions are available via an I2C interface, as specified by the QSFP+ MSA. The transceiver is RoHS-6 compliant and lead-free per Directive 2011/65/EU, and Application Note AN-2038.

10Gtek's QSFP-40G-LR4 PSM Module supports link lengths of 10KM. It primarily enables high-bandwidth 40G optical links over ribbon fiber cables terminated with multi-fiber connectors, and could also be used along with ribbon to duplex fiber breakout cables for connectivity to four 10GBASE-LR optical interfaces. This QSFP-40G-LR4 is built according to Cisco specifications, and is 100% compatible with Cisco System.
  • 4 Parallel lanes design
  • Up to 10km transmission on single mode fiber (SMF)
  • Up to 11.2Gbps data rate per channel
  • Aggregate Bandwidth of up to 44.0G
  • QSFP+ MSA compliant
  • MTP/MPO optical connector
  • Single +3.3V power supply
  • Maximum power consumption 3.5W
  • Operating case temperature: 0ºC~70ºC
  • RoHS-6 compliant
  • 40G Ethernet
  • Infiniband QDR, DDR and SDR
  • Datacenter and Enterprise networking
Order Information:
Part Number Description Data Rate Wavelength Reach Connector Fiber Type TX Power (dBm) Rx Sens. (dBm) Temp. Range(°C)
QSFP-SR4 QSFP+ SR4 44.8Gbps 850nm 150 m MTP/MPO MMF -7.6~1 < -9.5 0~70
QSFP-eSR4 QSFP+ eSR4 44.8Gbps 850nm 300 m MTP/MPO MMF -7.3~1 < -9.9 0~70
QSFP-IR4 PSM QSFP+ IR4 PSM 44.8Gbps 1310nm 1.4 km MTP/MPO SMF -5.5~1.5 < -11.5 0~70
QSFP-LR4 PSM QSFP+ LR4 PSM 44.8Gbps 1310nm 10 km MTP/MPO SMF -5.5~1.5 < -12.6 0~70
QSFP-IR4 QSFP+ IR4 44.8Gbps CWDM 2 km LC SMF -7~2.3 < -11.7 0~70
QSFP-LR4 QSFP+ LR4 44.8Gbps CWDM 10 km LC SMF -7~2.3 < -13.7 0~70
QSFP-ER4 QSFP+ ER4 44.8Gbps CWDM 30 km LC SMF -3.7~4.5 < -20.2 0~70

QSFP+ Transceivers

We Offer Compatibles Service:
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Shipping Methods:

Global Shipping

Together with, there is a Global Delivery from us like no others. We will not only delivery the correct shipment, but also for more things for an efficient and flexible way of business cooperation with our partners. ship worldwide to nearly every country across the globe, covering North and South America, Europe, Asia, Africa, Oceania, and more. We employ the services of major, trusted international carriers to ensure your package arrives to your destination safely and securely.

38 Country Free shipping

Online orders exceed $300.00 to following countries can enjoy Free Shipping;
Asia: Philippines, South Korea, Singapore, Brunei, Taiwan, Malaysia, Thailand, Japan, Indonisia, Indonesia, Kampuchea, Laos, Vietnam
North America: United States, Canada, Mexico
Oceania: Australia, New Zealand
Eastern Europe: Bulgaria, Estonia, Latvia, Lithuania, Slovakia, Romania
Southern Europe: Slovenia, Greece, Spain, Portugal, San Marino, Italy
Central Europe: Slovenia, Germany, Poland, Czech, Slovakia, Hungary, Austria, Switzerland
Western Europe: Belgium, Britain, Ireland, Netherlands, Luxemburg, France
Northern Europe: Sweden, Denmark, Finland, Norway

Typically, we use DHL and UPS to deliver your goods. Shipping methods are not fixed, they may vary according to country location, order amount, customer requirements, etc.

Payment Methods:

Payment methods available at include:

  • PayPal and PayPal Express
  • Bank to bank wire transfers (T/T)
  • Western Union
Warranty & Service

Warranty Policy:

Warranty Service Pack1*:     All 10Gtek's products share 1-year standard warranty.
Warranty Service Pack2*:     Enhanced Item (Apply to Online order at

DAC Cables (Passive) 3-Year Warranty
DAC Cables (Active) 3-Year Warranty
AOC Cable 3-Year Warranty
Fiber Optic Transceivers 3-Year Warranty
Switch, Convertors 1-Year Warranty
NIC/CNA Cards 1-Year Warranty
Optical System 1-Year Warranty
Patch Cords 1-Year Warranty
Power Adapter
0.5-Year Warranty
Consumer cable 3-Month

15-Day money back Guarantee:

15-Day money back guarantee applies to all products sold by provided that the items are new, undamaged, unmodified and in good resalable condition. If you are not satisfied with the product, you can apply return within 15 days.
All freight charges, transaction costs (bank charge or Paypal cost, etc) are the responsibility of the customer.

Returns are not acceptable if:
  1. The products are proved to have been abused, misused, replaced, repaired, or modified.
  2. After 15 days of delivery, returns are not acceptable. If the items are still under warranty period, customer could ask for repair or replacement. 
  3. No Return agreement was reached with a sales representative before Returns.
  4. Return process is not done based on Return instructions.


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