We have outdoor telecom cabinets. Does this model support industrial wide-temperature environments?

This specific part (LQ-BL859140-SR2C) supports commercial temperatures (0°C to +70°C), making it perfect for indoor datacenters and server rooms. For extreme outdoor environments, we have industrial-grade (-40°C to +85°C) BiDi variants in our catalog—just ask our tech support!

Will this BiDi transceiver work on my older OM3 multimode fiber, or do I absolutely need OM4?

It adapts perfectly to both! You'll easily get up to 100 meters of stable transmission over your standard OM3 fiber, and up to 150 meters if you are running OM4. Both utilize the same standard Duplex LC connector format.

Does this optical module meet standard IEEE and MSA industry compliance?

You bet. It is strictly compliant with IEEE 802.3 40GBASE-SR4, QSFP+ MSA, and SFF-8436 standards, ensuring rigorous performance compliance for both datacom and telecom switch environments.

If we order 500 units for an upcoming network rollout, what is your typical lead time and supply chain stability?

We keep massive local inventory for the LQ-BL859140-SR2C. For a 500-unit batch, handling time is usually just 3 business day, with a 2-5 day transit time to US locations. We guarantee your deployment stays on schedule.

Are these 40G QSFP+ BiDi transceivers compatible with Cisco and Fortinet switches out of the box?

Yes! This module is fully MSA compliant and programmed for plug-and-play interoperability with major OEM brands, including Cisco, Fortinet, Juniper, and Palo Alto. You won't run into any vendor lock-in errors during deployment.

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LINK-PP LQ-BL859140-SR2C 40G QSFP+ BiDi 850nm-TX/910nm-RX 150m Duplex LC DOM MMF Optical Transceiver Module

Name: LINK-PP LQ-BL859140-SR2C 40G QSFP+ BiDi 850nm-TX/910nm-RX 150m Duplex LC DOM MMF Optical Transceiver Module
Brand: LINK-PP
SKU: 205599
Price: 50.74 USD
Availability: InStock
Rating: 4.9 (19 reviews)

# 205599

Product: LINK-PP LQ-BL859140-SR2C 40G QSFP+ BiDi 850nm-TX/910nm-RX 150m Duplex LC DOM MMF Optical Transceiver Module
SKU: 205599
P/N: LQ-BL859140-SR2C
Price: $ 59
Stock: 290 in Stock
Sold: 2.8K
Product URL: https://www.l-p.com/products/494018.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

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Manufacture: LINK-PP

P/N: LQ-BL859140-SR2C

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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LINK-PP LQ-BL859140-SR2C 40G BiDi QSFP+ Specifications

The LINK-PP LQ-BL859140-SR2C 40G BiDi QSFP+ transceiver delivers high-performance 40GbE connectivity using advanced Bi-Directional technology. Operating at 40Gbps over a single LC duplex fiber, this reliable optical module multiplexes electrical lanes into dual 20Gb/s channels. It supports seamless integration for enterprise networks, maximizing efficiency while utilizing existing multimode fiber infrastructure perfectly.

LINK-PP Part Number	LQ-BL859140-SR2C	Vendor Name	LINK-PP
Form Factor	QSFP+	Max Data Rate	40Gbps
Wavelength	850nm-TX/910nm-RX	Max Cable Distance	150m@OM4/100m@OM3
Connector	Duplex LC	Media	MMF
Transmitter Type	VCSEL	Receiver Type	PIN
DDM/DOM	Supported	Operating Temperature Range	0°C to +70°C
Protocols	IEEE 802.3 40GBASE-SR4, QSFP+ MSA, SFF-8436	Warranty	5 Years

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Q: We have outdoor telecom cabinets. Does this model support industrial wide-temperature environments? By L***n on 2026-04-16

A: This specific part (LQ-BL859140-SR2C) supports commercial temperatures (0°C to +70°C), making it perfect for indoor datacenters and server rooms. For extreme outdoor environments, we have industrial-grade (-40°C to +85°C) BiDi variants in our catalog—just ask our tech support! By admin on 2026-04-16
Q: Will this BiDi transceiver work on my older OM3 multimode fiber, or do I absolutely need OM4? By S***r on 2026-04-12

A: It adapts perfectly to both! You'll easily get up to 100 meters of stable transmission over your standard OM3 fiber, and up to 150 meters if you are running OM4. Both utilize the same standard Duplex LC connector format. By admin on 2026-04-12
Q: Does this optical module meet standard IEEE and MSA industry compliance? By J***s on 2026-04-08

A: You bet. It is strictly compliant with IEEE 802.3 40GBASE-SR4, QSFP+ MSA, and SFF-8436 standards, ensuring rigorous performance compliance for both datacom and telecom switch environments. By admin on 2026-04-08
Q: If we order 500 units for an upcoming network rollout, what is your typical lead time and supply chain stability? By A***z on 2026-04-08

A: We keep massive local inventory for the LQ-BL859140-SR2C. For a 500-unit batch, handling time is usually just 3 business day, with a 2-5 day transit time to US locations. We guarantee your deployment stays on schedule. By admin on 2026-04-08
Q: Are these 40G QSFP+ BiDi transceivers compatible with Cisco and Fortinet switches out of the box? By A***a on 2025-11-08

A: Yes! This module is fully MSA compliant and programmed for plug-and-play interoperability with major OEM brands, including Cisco, Fortinet, Juniper, and Palo Alto. You won't run into any vendor lock-in errors during deployment. By admin on 2025-11-08

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M***r

Hong Kong

Verified Purchase

5 .0

2026-06-14

Replaced our legacy spine-leaf optics with this 40G QSFP+ model. The 40GBASE-SR4 protocol support ensures seamless interoperability with our Juniper and Palo Alto gear. Overall total cost of ownership is incredibly low here.

38 Helpful vote Comments

C***s

Poland

Verified Purchase

5 .0

2026-04-17

Instant plug and play. Zero DOM errors.

181 Helpful vote Comments

J***t

Denmark

Verified Purchase

5 .0

2026-02-26

Excellent value for enterprise procurement. Bulk deploying these MMF 850nm/910nm optical transceivers next month.

181 Helpful vote Comments

C***s

Bolivia

Verified Purchase

5 .0

2026-01-18

Cheap and reliable MMF 40GbE module!

71 Helpful vote Comments

J***n

Dominican Republic

Verified Purchase

5 .0

2025-09-23

Upgraded our enterprise network easily. The duplex LC 40GbE module saved us fiber costs!

46 Helpful vote Comments

M***n

Panama

Verified Purchase

5 .0

2025-09-01

Finding reliable 150m OM4 40G optics without crazy OEM markup is tough. These hit the SFF-8436 standards perfectly. We run them in a high-density 10G NAS aggregation setup with absolutely zero CRC errors!

132 Helpful vote Comments

C***g

Ukraine

Verified Purchase

4 .0

2025-08-30

Box was slightly crushed upon arrival, but the 40G QSFP+ BiDi module works flawlessly.

158 Helpful vote Comments

D***r

United Kingdom

Verified Purchase

5 .0

2025-08-04

Works great with our Cisco switches.

57 Helpful vote Comments

P***n

Czech Republic

Verified Purchase

5 .0

2025-07-03

Great QSFP+ DOM compatibility. Real-time monitoring helps my IT team track link health easily.

72 Helpful vote Comments

S***z

Taiwan, Province of China

Verified Purchase

5 .0

2025-07-02

Benchmarked this MMF 850nm/910nm optical transceiver against major brands. TX/RX power holds strong even at 65°C under max throughput. It's an excellent duplex LC 40GbE module for scaling indoor data centers efficiently.

83 Helpful vote Comments

E***n

Colombia

Verified Purchase

5 .0

2025-06-24

Flawless 150m OM4 reach. Great buy.

175 Helpful vote Comments

A***z

Panama

Verified Purchase

5 .0

2025-06-21

We deployed 50 of these 40G QSFP+ BiDi transceivers across our enterprise campus. Reusing our existing LC multimode fiber infrastructure saved massive CAPEX. DDM monitoring is accurate, and Brocade compatibility is 100% stable.

64 Helpful vote Comments

A***n

Canada

Verified Purchase

5 .0

2025-05-10

Ideal for indoor rack-to-rack fiber links. Working steady at 45°C in our server room.

41 Helpful vote Comments

C***s

Austria

Verified Purchase

5 .0