Will this module play nice with mixed environments? We have Cisco cores and Arista leaf switches.

Yes! The LQ-SW40-SR4I features strict SFF-8636 protocol compliance and seamless OEM interoperability. It works flawlessly across multi-brand environments, ensuring standard DOM and XLPPI electrical interface readings without proprietary lock-in.

How fast can you ship these? We have an urgent data center interconnect project starting next week.

We currently have strong stock levels for the 40G QSFP+ industrial module. Typical lead time for in-stock items is just 5-7 days globally via FedEx, ensuring your infrastructure upgrades stay right on schedule.

We need to meet specific regulatory standards for our UK data center. Is this transceiver fully compliant?

Yes, it is heavily certified. The module complies with CE, UKCA, FCC, UL, RoHS, and REACH standards, meeting all strict global electromagnetic compatibility (EMC) and environmental safety requirements for enterprise data centers.

Does this work directly with our existing duplex OM3 fiber, or do we strictly need OM4/OM5?

You can absolutely use your existing LC duplex MMF infrastructure. It supports up to 240m on OM3, 350m on OM4, and up to 440m if you eventually upgrade to OM5. No expensive MPO cabling required!

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LINK-PP LQ-SW40-SR4I 40G QSFP+ SWDM4 350m DOM Duplex LC MMF Optical Transceiver Module (Industrial)

Name: LINK-PP LQ-SW40-SR4I 40G QSFP+ SWDM4 350m DOM Duplex LC MMF Optical Transceiver Module (Industrial)
Brand: LINK-PP
SKU: 216608
Price: 309.609 CAD
Availability: InStock
Rating: 4.9 (25 reviews)

Product: LINK-PP LQ-SW40-SR4I 40G QSFP+ SWDM4 350m DOM Duplex LC MMF Optical Transceiver Module (Industrial)
SKU: 216608
P/N: LQ-SW40-SR4I
Price: CA$ 360.01
Stock: 90 in Stock
Sold: 710
Product URL: https://www.l-p.com/products/495610.htm

For Order Over $1000 Get $15.00 Off , Code: Linkpp15

For Order Over $3000 Get $50.00 Off , Code: Linkpp50

For Order Over $5000 Get $100.00 Off , Code: Linkpp100

New Users: $10 Coupon for Orders , Code: linkpp2610

25 Reviews

4 Questions

710 Sold

CA$ 259

Free shipping. For wholesale pricing, please contact us directly.

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Unit Price :

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100

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1000

CA$ 331.21

3000

CA$ 320.409

6000

CA$ 309.609

Manufacture: LINK-PP P/N: LQ-SW40-SR4I SKU: 216608

Compatible:: LINK-PP

Compatible P/N:: LQ-BL859140-SRC | 100m; LQ-BL859140-SR2C | 150m; LQ-BL918540-SR2C | 150m; LQ-M8540-SR4C | 300m; LQ-M8540-SR4I | 300m; LQ-SW40-SR4C | 350m; LQ-SW40-SR4I | 350m; LQ-CW40-FR4C | 2km; LQ-CW40-LR4C | 10km; LQ-CW40-LR4I | 10km; LQ-M3140-LR4C | 10km; LQ-CW40-L24C | 20km; LQ-M3140-L24C | 20km; LQ-CW40-ER4C | 40km; LQ-CW40-ER4I | 40km; LQ-LW40-L64C | 60km; LQ-LW40-ZR4C | 80km; LQ-LW40L-ZR4C | 80km; LQ-DW40-A04C | 100km

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Estimated delivery time : 3 - 10 days.

5-Year Warranty 30-Day Returns 30-Day Exchange

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LINK-PP LQ-SW40-SR4I 40G QSFP+ Specifications

The LINK-PP LQ-SW40-SR4I is an industrial-grade 40G QSFP+ SWDM4 optical transceiver delivering a 41.2Gbps aggregate bit rate over duplex multimode fiber. Featuring VCSEL transmitters and PIN receivers, this hot-pluggable module supports links up to 350m on OM4 MMF. Operating between -40°C and +85°C with power consumption below 3.5W, it complies with QSFP+ MSA and SFF-8636 standards.

LINK-PP Part Number	LQ-SW40-SR4I	Vendor Name	LINK-PP
Form Factor	QSFP+	Max Data Rate	41.2Gbps
Wavelength	850nm, 880nm, 910nm, 940nm	Max Cable Distance	350m@OM4
Connector	Duplex LC	Media	MMF
Transmitter Type	VCSEL	Receiver Type	PIN
Operating Temperature Range	-40°C to +85°C	EMC (Electro Magnetic Compatibility)	Supported
DDM/DOM	Supported	Protocols	QSFP+ MSA, SWDM MSA, SFF-8636, IEEE 802.3ba, XLPPI electrical interface

Key Features of LINK-PP LQ-SW40-SR4I 40G QSFP+

Engineered for high-density networking, the LINK-PP LQ-SW40-SR4I 40G QSFP+ module offers four 10G optical channels over duplex LC fiber. It combines low power dissipation under 3.5W, an industrial -40°C to +85°C operating range, XLPPI electrical interface compatibility, and comprehensive digital diagnostic monitoring for mission-critical enterprise and data center deployments.

LINK-PP LQ-SW40-SR4I 40G QSFP+ Optical Module

The LINK-PP LQ-SW40-SR4I 40G QSFP+ optical transceiver features a hot-pluggable form factor and 4x10Gbps VCSEL architecture. It ensures seamless Ethernet connectivity, superior signal integrity, and low insertion loss across high-speed optical networking environments.

LQ-SW40-SR4I: 40G Connectivity for Data Center

Designed for enterprise data centers and campus networks, the LQ-SW40-SR4I delivers ultra-reliable 40G Ethernet interconnectivity. It significantly enhances aggregation bandwidth between core switches and servers while optimizing rack airflow and energy efficiency.

LQ-SW40-SR4I Module with SWDM4 Technology for Fiber Efficiency

Utilizing Short Wavelength Division Multiplexing, the LQ-SW40-SR4I module multiplexes four separate wavelengths onto a single pair of multimode fibers. This enables direct 10G-to-40G network migration without costly upgrades to multi-fiber MPO infrastructures.

LQ-SW40-SR4I Module with 850nm, 880nm, 910nm, 940nm Wavelength

The LQ-SW40-SR4I transceiver operates across four discrete optical channels centered at 850nm, 880nm, 910nm, and 940nm. This optimized multi-wavelength transmission guarantees low inter-lane crosstalk and excellent dispersion tolerance over wideband multimode fiber.

LQ-SW40-SR4I Module Supporting 350m Transmission

Engineered for flexible campus reaches, the LQ-SW40-SR4I module supports transmission distances up to 240m on OM3, 350m on OM4, and 440m on OM5 multimode fiber, maintaining robust link budgets and zero packet loss.

LQ-SW40-SR4I Module with Duplex LC Interface

Featuring an industry-standard duplex LC optical receptacle, the LQ-SW40-SR4I module enables direct plug-and-play installation using existing duplex LC patch cables, simplifying structured cabling and dramatically reducing overall infrastructure retrofitting expenses.

LQ-SW40-SR4I Module with DOM for Real-Time Monitoring

Integrated with digital optical monitoring (DOM) via an I2C interface per SFF-8636, the LQ-SW40-SR4I allows real-time telemetry tracking of module temperature, supply voltage, laser bias currents, and optical transmit/receive power.

LINK-PP LQ-SW40-SR4I 40G QSFP+ Certification

The LINK-PP LQ-SW40-SR4I 40G QSFP+ module strictly complies with global regulatory standards, including CE, FCC, UKCA, UL, RoHS, and REACH certifications, ensuring international electromagnetic compatibility, safety, and environmental protection.

LQ-SW40-SR4I Quality Testing Program

Every LQ-SW40-SR4I transceiver undergoes LINK-PP’s rigorous multi-stage quality assurance program, including 100% automated optical testing, environmental stress screening, and comprehensive functional validation before shipment to guarantee flawless performance.

LQ-SW40-SR4I Quality Certifications

Manufactured under stringent ISO9001 quality management systems, the LQ-SW40-SR4I holds full CE, FCC, UL, and RoHS approvals, verifying its outstanding design reliability, manufacturing excellence, and hazardous substance compliance.

LQ-SW40-SR4I Certified for Reliable Host-Device Compatibility

The LQ-SW40-SR4I is pre-programmed and certified for seamless plug-and-play interoperability across leading switch and router platforms, ensuring reliable link negotiation, accurate EEPROM recognition, and zero vendor lock-in.

Rigorous Testing Ensures Reliable QSFP+ Performance

To guarantee carrier-grade durability, our QSFP+ transceivers pass exhaustive optical, electrical, and environmental stress tests simulating harsh operational conditions before deployment.

Rigorous Testing Ensures Reliable Transceiver Performance

Optical Spectrum Test

Precise spectral analysis validates exact center wavelengths and narrow spectral widths across all SWDM4 channels.

Eye Pattern Test

Comprehensive oscilloscope eye diagram testing guarantees wide eye openings, low jitter, and excellent signal integrity.

Bit Error Rate Test

Automated BERT verification ensures flawless, zero packet-loss optical transmission under maximum data throughput.

Temperature Test

Thermal chamber cycling confirms stable optical performance across the industrial -40°C to +85°C range.

Product Shipping for LINK-PP LQ-SW40-SR4I 40G QSFP+

LINK-PP implements robust protective packaging and streamlined fulfillment processes to guarantee safe, fast, and traceable worldwide delivery for LQ-SW40-SR4I modules.

Anti-Static Protective Packaging

Custom ESD-shielded blister packaging prevents electrostatic damage during handling and storage.

Shock-Resistant Transport Protection

High-density foam cushioning protects optical modules against mechanical shock and vibration.

Fast Order Processing and Dispatch

Efficient warehouse operations ensure same-day or expedited order processing and rapid dispatch.

Global Logistics and International Delivery

Partnering with leading international carriers provides fast, secure door-to-door global shipping.

LINK-PP LQ-SW40-SR4I 40G QSFP+ Usage Demonstration

Installing the LINK-PP LQ-SW40-SR4I 40G QSFP+ module is effortless: align the transceiver with the QSFP+ port, slide it firmly until latched, and connect your duplex LC multimode patch cable to establish high-speed links instantly.

LQ-SW40-SR4I Technical Support

LINK-PP provides professional technical support, including pre-sales consultation, compatibility verification, and post-deployment troubleshooting to ensure smooth network operation.

Pre-Sales Technical Consultation

Professional technical guidance to help customers select the most suitable LQ-SW40-SR4I modules based on network architecture and application requirements.

Compatibility Verification Support

Compatibility checks and validation to ensure seamless operation with Cisco switches and other supported networking platforms.

Deployment & Installation Assistance

Step-by-step support for installation, configuration, and initial deployment to ensure stable and correct operation.

Long-Term Technical Assurance

Ongoing technical support throughout the product lifecycle to ensure reliable performance in enterprise and carrier-grade networks.

LINK-PP LQ-SW40-SR4I 40G QSFP+ After-Sales Assurance

LINK-PP provides after-sales support for the smooth deployment and reliable operation of the optical modules.

15-day no-reason return and refund

Free replacement for dead-on-arrival (DOA) or defective items within the initial period

Free repair services for manufacturing defects throughout the warranty period

Warranty exclusions and conditions apply

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Q: Will this module play nice with mixed environments? We have Cisco cores and Arista leaf switches. By R***n on 2026-08-14

A: Yes! The LQ-SW40-SR4I features strict SFF-8636 protocol compliance and seamless OEM interoperability. It works flawlessly across multi-brand environments, ensuring standard DOM and XLPPI electrical interface readings without proprietary lock-in. By admin on 2026-08-14
Q: How fast can you ship these? We have an urgent data center interconnect project starting next week. By J***n on 2026-08-09

A: We currently have strong stock levels for the 40G QSFP+ industrial module. Typical lead time for in-stock items is just 5-7 days globally via FedEx, ensuring your infrastructure upgrades stay right on schedule. By admin on 2026-08-09
Q: We need to meet specific regulatory standards for our UK data center. Is this transceiver fully compliant? By D***r on 2026-06-08

A: Yes, it is heavily certified. The module complies with CE, UKCA, FCC, UL, RoHS, and REACH standards, meeting all strict global electromagnetic compatibility (EMC) and environmental safety requirements for enterprise data centers. By admin on 2026-06-08
Q: Does this work directly with our existing duplex OM3 fiber, or do we strictly need OM4/OM5? By P***s on 2026-04-10

A: You can absolutely use your existing LC duplex MMF infrastructure. It supports up to 240m on OM3, 350m on OM4, and up to 440m if you eventually upgrade to OM5. No expensive MPO cabling required! By admin on 2026-04-10

Customer Reviews
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A***n

Canada

Verified Purchase

5 .0

2026-08-27

DOM features read accurately on Cisco gear.

83 Helpful vote Comments

S***r

Brazil

Verified Purchase

5 .0

2026-08-22

Fast shipping for our campus fiber network expansion. VCSEL/PIN setup is incredibly stable.

97 Helpful vote Comments

J***g

Belgium

Verified Purchase

5 .0

2026-08-22

Our enterprise campus fiber network needed an upgrade. Sourced this duplex LC 40G optic for multi-brand switch compatibility tests. Interoperability is flawless, DOM reads precisely, and it handles 350m transmission easily. Highly recommend!

66 Helpful vote Comments

L***r

Venezuela

Verified Purchase

5 .0

2026-08-15

Solid SWDM4 transceiver. Plug and play!

84 Helpful vote Comments

D***r

Austria

Verified Purchase

5 .0

2026-08-06

No multi-fiber MPO needed, saves money!

64 Helpful vote Comments

R***z

Venezuela

Verified Purchase

5 .0

2026-07-14

Using this duplex LC 40G optic for enterprise NAS. 41.2Gbps throughput is consistent. ⚡

191 Helpful vote Comments

J***n

Mexico

Verified Purchase

5 .0

2026-07-01

Great duplex LC 40G optic for campus.

144 Helpful vote Comments

K***a

Kazakhstan

Verified Purchase

5 .0

2026-06-30

Real-time DOM monitoring works exactly like the original brand, but much more cost-effective.

196 Helpful vote Comments

R***s

Mexico

Verified Purchase

5 .0

2026-06-16

Flawless 40G QSFP+ industrial module, no issues.

177 Helpful vote Comments

N***g

Switzerland

Verified Purchase

5 .0

2026-06-14

Works perfectly in our outdoor cabinet.

181 Helpful vote Comments

D***n

Philippines

Verified Purchase

4 .0

2026-06-09

Logistics took an extra day. The 40G SWDM4 performance is totally solid though.

5 Helpful vote Comments

J***t

Poland

Verified Purchase

5 .0

2026-06-01

Tested this 40G QSFP+ industrial module for a base station backhaul in extreme heat. The -40°C to 85°C spec holds up perfectly. DDM telemetry shows stable laser bias and optical receive power.

35 Helpful vote Comments

C***z

Panama

Verified Purchase

5 .0

2026-04-19

Awesome cost-effectiveness for 40G multimode links.

152 Helpful vote Comments

J***k

Ethiopia

Verified Purchase

5 .0

2026-04-10

Perfect fit for our data center interconnect.

158 Helpful vote Comments

P***l

Russian Federation

Verified Purchase

4 .0

2026-03-12

Packaging was slightly dented upon arrival, but the 40G QSFP+ industrial module works flawlessly.

8 Helpful vote Comments

A***z

Ukraine

Verified Purchase

5 .0

2026-03-09

The 40G QSFP+ SWDM4 saved us from upgrading to MPO cables. Good stuff.

85 Helpful vote Comments

R***n

Germany

Verified Purchase

5 .0

2026-03-06

Ran 350m on OM4 without packet loss.

171 Helpful vote Comments

M***a

Indonesia

Verified Purchase

5 .0

2026-02-25

Upgraded our core switch using this 40G QSFP+ industrial module. Absolutely seamless integration.

119 Helpful vote Comments

J***r

Chile

Verified Purchase

5 .0

2026-02-22

Tested the SWDM4 transceiver on OM3 fiber. Solid 240m reach without any errors.

175 Helpful vote Comments

R***z

Ukraine

Verified Purchase

5 .0

2026-02-03

Needed a reliable SWDM4 transceiver for an industrial warehouse setup. Power dissipation is under 3.5W which helps our enclosed racks. The 40G link via OM5 hit 400m flawlessly with zero packet loss.

77 Helpful vote Comments

K***g

Thailand

Verified Purchase

5 .0

2026-01-30

Smooth batch deployment in server racks.

71 Helpful vote Comments

M***s

Mexico

Verified Purchase

5 .0

2026-01-29

Reliable wide temp performance in extreme heat.

90 Helpful vote Comments

D***n

Bolivia

Verified Purchase

5 .0

2025-12-18

Excellent OEM compatibility. SFF-8636 protocols read perfectly during all our multi-brand switch testing.

154 Helpful vote Comments

A***z

Finland

Verified Purchase

5 .0

2025-11-26

We run a high-density data center interconnect and deployed 50 of these SWDM4 transceivers. 850-940nm multiplexing over duplex LC OM4 is brilliant. No expensive MPO infrastructure required, saving our IT budget massively.

123 Helpful vote Comments

J***h

Chile

Verified Purchase

5 .0

2025-10-11

Deployed in a harsh outdoor cabinet environment. -40C to 85C temp rating is legit.

96 Helpful vote Comments

Verified Purchase

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{"pid":497282,"minimum_ordered_quantity":1,"skulist":[{"pskuid":223519,"cid":752,"pid":497282,"sku":"223519","psvid1":326654,"psvid2":326655,"psvid3":0,"psvid4":0,"left_num":94,"price":"1890.000","strike_price":"0.000","innercode":"","addtime":"2026-08-17 00:52:00","uptime":"2026-08-17 00:52:00","status":0}],"shippingLists":[{"id":"FedEx","name":"FedEx","logo":"res\/shipping\/FEDEX.jpg","price":"0","isfree":0,"total":"0","tax":"","datemin":"3","datemax":"10","unit_price":"1,890","subtotal":1890}]}
Cisco

QSFPP-40G-EZR4-CI | 100km

Cisco QSFPP-40G-EZR4-CI Compatible LINK-PP 40G QSFP+ 4 DWDM channels 100km Duplex LC DOM SMF Transceiver Module

936 Sold

CA$ 2,627.1 ~~CA$ 0.00~~

{"pid":497281,"minimum_ordered_quantity":1,"skulist":[{"pskuid":223521,"cid":752,"pid":497281,"sku":"223521","psvid1":326658,"psvid2":326659,"psvid3":0,"psvid4":0,"left_num":134,"price":"1890.000","strike_price":"0.000","innercode":"","addtime":"2026-08-17 00:52:05","uptime":"2026-08-17 00:52:05","status":0}],"shippingLists":[{"id":"FedEx","name":"FedEx","logo":"res\/shipping\/FEDEX.jpg","price":"0","isfree":0,"total":"0","tax":"","datemin":"3","datemax":"10","unit_price":"1,890","subtotal":1890}]}
Juniper

QSFPP-4X10GE-SR | 300m

Juniper QSFPP-4X10GE-SR Compatible LINK-PP 40G QSFP+ SR4 850nm 300m MPO-12 DOM MMF Optical Transceiver Module

26 Reviews
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CA$ 50.04 ~~CA$ 0.00~~

{"pid":497158,"minimum_ordered_quantity":1,"skulist":[{"pskuid":222792,"cid":752,"pid":497158,"sku":"222792","psvid1":325200,"psvid2":325201,"psvid3":0,"psvid4":0,"left_num":325,"price":"36.000","strike_price":"0.000","innercode":"","addtime":"2026-08-13 23:14:50","uptime":"2026-08-13 23:14:50","status":0}],"shippingLists":[{"id":"FedEx","name":"FedEx","logo":"res\/shipping\/FEDEX.jpg","price":"0","isfree":0,"total":"0","tax":"","datemin":"3","datemax":"10","unit_price":"36","subtotal":36}]}
Cisco

QSFP-40G-SR4 | 300m

Cisco QSFP-40G-SR4 Compatible LINK-PP 40G QSFP+ SR4 850nm 300m MPO-12 DOM MMF Optical Transceiver Module

20 Reviews
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CA$ 50.04 ~~CA$ 0.00~~

{"pid":496955,"minimum_ordered_quantity":1,"skulist":[{"pskuid":221850,"cid":752,"pid":496955,"sku":"221850","psvid1":323320,"psvid2":323321,"psvid3":0,"psvid4":0,"left_num":336,"price":"36.000","strike_price":"0.000","innercode":"","addtime":"2026-08-11 00:56:38","uptime":"2026-08-11 00:56:38","status":0}],"shippingLists":[{"id":"FedEx","name":"FedEx","logo":"res\/shipping\/FEDEX.jpg","price":"0","isfree":0,"total":"0","tax":"","datemin":"3","datemax":"10","unit_price":"36","subtotal":36}]}
Fortinet

FN-TRAN-QSFP+SR | 300m

Fortinet FN-TRAN-QSFP+SR Compatible LINK-PP 40G QSFP+ 850nm 300m MPO-12 DOM MMF Optical Transceiver Module (Industrial)

30 Reviews
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252 Sold

CA$ 118.15 ~~CA$ 0.00~~

{"pid":495625,"minimum_ordered_quantity":1,"skulist":[{"pskuid":221456,"cid":752,"pid":495625,"sku":"221456","psvid1":322532,"psvid2":322533,"psvid3":0,"psvid4":0,"left_num":643,"price":"85.000","strike_price":"0.000","innercode":"","addtime":"2026-08-09 20:51:48","uptime":"2026-08-09 20:51:48","status":0}],"shippingLists":[{"id":"FedEx","name":"FedEx","logo":"res\/shipping\/FEDEX.jpg","price":"0","isfree":0,"total":"0","tax":"","datemin":"3","datemax":"10","unit_price":"85","subtotal":85}]}
LINK-PP

LQ-BL918540-SR2C | 150m

LINK-PP LQ-BL918540-SR2C 40G QSFP+ BiDi 910nm-TX/850nm-RX 150m DOM Duplex LC MMF Optical Transceiver Module

25 Reviews
|
908 Sold

CA$ 82.01 ~~CA$ 0.00~~

{"pid":495620,"minimum_ordered_quantity":1,"skulist":[{"pskuid":216640,"cid":752,"pid":495620,"sku":"216640","psvid1":312946,"psvid2":312947,"psvid3":0,"psvid4":0,"left_num":112,"price":"59.000","strike_price":"0.000","innercode":"","addtime":"2026-07-15 01:09:19","uptime":"2026-07-15 01:09:19","status":0}],"shippingLists":[{"id":"FedEx","name":"FedEx","logo":"res\/shipping\/FEDEX.jpg","price":"0","isfree":0,"total":"0","tax":"","datemin":"3","datemax":"10","unit_price":"59","subtotal":59}]}

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LINK-PP LQ-SW40-SR4I 40G QSFP+ SWDM4 350m DOM Duplex LC MMF Optical Transceiver Module (Industrial)

Product summary

Product Details

LINK-PP LQ-SW40-SR4I 40G QSFP+ Specifications

Key Features of LINK-PP LQ-SW40-SR4I 40G QSFP+

LINK-PP LQ-SW40-SR4I 40G QSFP+ Optical Module

LQ-SW40-SR4I: 40G Connectivity for Data Center

LQ-SW40-SR4I Module with SWDM4 Technology for Fiber Efficiency

LQ-SW40-SR4I Module with 850nm, 880nm, 910nm, 940nm Wavelength

LQ-SW40-SR4I Module Supporting 350m Transmission

LQ-SW40-SR4I Module with Duplex LC Interface

LQ-SW40-SR4I Module with DOM for Real-Time Monitoring

LINK-PP LQ-SW40-SR4I 40G QSFP+ Certification

LQ-SW40-SR4I Quality Testing Program

LQ-SW40-SR4I Quality Certifications

LQ-SW40-SR4I Certified for Reliable Host-Device Compatibility

Rigorous Testing Ensures Reliable QSFP+ Performance

Optical Spectrum Test

Eye Pattern Test

Bit Error Rate Test

Temperature Test

Product Shipping for LINK-PP LQ-SW40-SR4I 40G QSFP+

Anti-Static Protective Packaging

Shock-Resistant Transport Protection

Fast Order Processing and Dispatch

Global Logistics and International Delivery

LINK-PP LQ-SW40-SR4I 40G QSFP+ Usage Demonstration

LQ-SW40-SR4I Technical Support

Pre-Sales Technical Consultation

Compatibility Verification Support

Deployment & Installation Assistance

Long-Term Technical Assurance

LINK-PP LQ-SW40-SR4I 40G QSFP+ After-Sales Assurance

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LINK-PP LQ-SW40-SR4I 40G QSFP+ SWDM4 350m DOM Duplex LC MMF Optical Transceiver Module (Industrial)

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