Hello, looking to use these 40G QSFP+ modules in a mixed environment with Cisco Nexus and Juniper QFX switches. Will DOM and MPO connections work seamlessly across both?

Absolutely! The LQ-M8540-SR4C is extensively tested for multi-vendor interoperability and works perfectly with major brands like Cisco, Juniper, and Arista. MPO-12 connectivity and live DOM/DDM metrics will function smoothly across your mixed-switch deployment without any proprietary lock-ins.

We're planning a massive data center upgrade and need about 500 of these 40GBASE-SR4 transceivers. Do you offer B2B bulk discounts or net terms?

Yes, we do! For high-volume enterprise procurement, we offer significant tiered bulk discounts and flexible net terms to support your capital expenditure plans. Please reach out to our B2B sales team directly to get a custom quote for your 500-unit rollout.

Do these QSFP+ 40G transceivers meet standard industry compliance? We need RoHS and MSA certification for our corporate compliance policies.

Yes, strictly compliant. The LQ-M8540-SR4C adheres to the SFF-8436 MSA standard, IEEE 802.3ba, and is fully RoHS certified. They meet all stringent global data center networking and safety standards, ensuring zero compliance friction for corporate enterprise deployments.

Can I use this 850nm transceiver with older OM2 fiber, or does it strictly require OM3/OM4 MPO cables to hit that 300m transmission distance?

To achieve the reliable 40Gbps speed and reach the maximum transmission distance (150m on OM3, 300m on OM4), you must use OM3 or OM4 multimode fiber with an MPO-12 connector. Legacy OM2 cables simply lack the bandwidth capacity required for 40G transmission over practical distances.

Breadcrumb: Home; Products; Optics Transceivers | SFP Modules; 10/25/40G/100G Transceiver Modules; 40G QSFP+; 221431

Click to open expanded view

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

Name: Extreme 40GB-SR4-QSFP Compatible LINK-PP 40G QSFP+ SR4 850nm 300m MPO-12 DOM MMF Optical Transceiver Module
Brand: LINK-PP
SKU: 221431
Price: 30.96 USD
Availability: InStock
Rating: 5 (25 reviews)

# 221431

Product: Extreme 40GB-SR4-QSFP Compatible LINK-PP 40G QSFP+ SR4 850nm 300m MPO-12 DOM MMF Optical Transceiver Module
SKU: 221431
P/N: LQ-M8540-SR4C
Price: $ 36
Stock: 343 in Stock
Sold: 2K
Product URL: https://www.l-p.com/products/482753.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

Request Stock

2K Sold

$ 36

Free shipping over $600, If you need a more favorable price, please contact us directly.

Qty (pcs) :

Unit Price :

$ 36

100

$ 34.2

1000

$ 33.12

3000

$ 32.04

6000

$ 30.96

Manufacture: LINK-PP

P/N: LQ-M8540-SR4C

Compatible:: Cisco; LINK-PP; APRESIA; Alcatel-Lucent; Allied Telesis; Arista; Avago; Avaya; BladeSystem; Brocade; Check Point; Chelsio; Ciena; Cisco Meraki; D-Link; DELL; EdgeCore; Extreme; F5 Networks; FS; Fortinet; Gigamon; H3C; HPE Aruba; HPE H3C; HW; IBM; Intel; Ixia; Juniper; MRV; MikroTik; NVIDIA/Mellanox; Palo Alto; Quanta; ZTE

Compatible P/N:: 40GB-SR4-QSFP | 300m; QSFP-SR4-40G-I | 300m; 10326 | 10km

Shipping:

To Be Negotiated

Free Shipping

Can't deliver

to United States via {{now_chooseship?now_chooseship.name:''}}

Estimated delivery time : {{now_chooseship?now_chooseship.datemin:''}}-{{now_chooseship?now_chooseship.datemax:''}} days. See details

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

Stock:

{{parseInt(detail_data.left_num) ? detail_data.left_num +' in Stock' :detail_data.zeroStockOrder==0?'Out of Stock':'Available'}} .

Quantity:

( Min. Order {{detail_data.prodInfo.minimum_ordered_quantity}} )

undeliverable

Total Price:

{{ detail_data.displayed_price.unit_prefix }} {{ detail_data.displayed_price.original_total_price }} ( {{ detail_data.displayed_price.rate_of_discount }}% OFF ) {{detail_data.displayed_price.ex_sell_type}}

Add to wish

Specifications

Specification
Videos
Matching Products
Download
Q&A
Customer Reviews

Extreme 40GB-SR4-QSFP Compatible LINK-PP 40G QSFP+ Specifications

The Extreme 40GB-SR4-QSFP Compatible LINK-PP module is a premium 40G QSFP+ optical transceiver engineered for high-speed network connections. Operating at an 850nm wavelength, this high-performance module supports data center infrastructure with robust 40Gbps connectivity over multimode fiber. It integrates an MPO connector and advanced DOM capabilities, ensuring seamless commercial-grade performance and exceptional reliability.

Extreme Part Number	40GB-SR4-QSFP	Vendor Name	LINK-PP
Form Factor	QSFP+	Max Data Rate	40Gbps
Wavelength	850nm	Max Cable Distance	300m
Connector	MPO-12	Media	MMF
Transmitter Type	VCSEL	Receiver Type	PIN
Protocols	IEEE 802.3 40GBASE-SR4, SFF-8436	Operating Temperature Range	0°C to +70°C

Videos

Matching Products

Pictures

ID#

Description

Price

Stock

Add to Cart

Download

Product Drawing

PDF
LQ-M8540-SR4C.pdf

Questions & Answers
Ask a Question

No data

Q: Hello, looking to use these 40G QSFP+ modules in a mixed environment with Cisco Nexus and Juniper QFX switches. Will DOM and MPO connections work seamlessly across both? By K***l on 2026-04-16

A: Absolutely! The LQ-M8540-SR4C is extensively tested for multi-vendor interoperability and works perfectly with major brands like Cisco, Juniper, and Arista. MPO-12 connectivity and live DOM/DDM metrics will function smoothly across your mixed-switch deployment without any proprietary lock-ins. By admin on 2026-04-17
Q: We're planning a massive data center upgrade and need about 500 of these 40GBASE-SR4 transceivers. Do you offer B2B bulk discounts or net terms? By J***z on 2026-03-03

A: Yes, we do! For high-volume enterprise procurement, we offer significant tiered bulk discounts and flexible net terms to support your capital expenditure plans. Please reach out to our B2B sales team directly to get a custom quote for your 500-unit rollout. By admin on 2026-03-04
Q: Do these QSFP+ 40G transceivers meet standard industry compliance? We need RoHS and MSA certification for our corporate compliance policies. By P***r on 2025-11-22

A: Yes, strictly compliant. The LQ-M8540-SR4C adheres to the SFF-8436 MSA standard, IEEE 802.3ba, and is fully RoHS certified. They meet all stringent global data center networking and safety standards, ensuring zero compliance friction for corporate enterprise deployments. By admin on 2025-11-22
Q: Can I use this 850nm transceiver with older OM2 fiber, or does it strictly require OM3/OM4 MPO cables to hit that 300m transmission distance? By D***s on 2025-10-29

A: To achieve the reliable 40Gbps speed and reach the maximum transmission distance (150m on OM3, 300m on OM4), you must use OM3 or OM4 multimode fiber with an MPO-12 connector. Legacy OM2 cables simply lack the bandwidth capacity required for 40G transmission over practical distances. By admin on 2025-10-29

Customer Reviews
Write a Review

{{stardata.star}}

{{comment.count}} reviews
5 Stars

{{comment.star5}}%

4 Stars

{{comment.star4}}%

3 Stars

{{comment.star3}}%

2 Stars

{{comment.star2}}%

1 Star

{{comment.star1}}%

All Reviews ({{comment.star_num?comment.star_num:comment.count}})

All Reviews

5 stars only

4 stars only

3 stars only

2 stars only

1 star only
Reviews with Pictures ( {{comment.pic_comment}} )
See All Reviews

No data

D***e

Spain

Verified Purchase

5 .0

2026-05-17

Plug and play QSFP+ with my Juniper gear.

175 Helpful vote Comments

C***s

Ukraine

Verified Purchase

5 .0

2026-04-22

Deployed 50 MPO-12 40GBASE-SR4 modules for a 40G NAS cluster. VCSEL laser power is excellent, staying well within 0-70C limits. Unbeatable Total Cost of Ownership for enterprise B2B networks.

99 Helpful vote Comments

D***s

Peru

Verified Purchase

5 .0

2026-01-11

Ran an iPerf test across Dell and Cisco core switches using these 40G QSFP+ SR4 850nm transceivers. Zero CRC errors over a 250m OM4 run. DOM stats remained highly accurate!

39 Helpful vote Comments

L***n

Peru

Verified Purchase

5 .0

2025-09-19

Tested 40Gbps MPO-12 throughput. 100% stable connections.

86 Helpful vote Comments

M***s

Indonesia

Verified Purchase

5 .0

2025-05-14

Really cost-effective for bulk deployment. Compatibility with FS and Arista switches is a huge plus.

107 Helpful vote Comments

N***r

Colombia

Verified Purchase

5 .0

2025-04-07

Excellent 850nm VCSEL performance. Seamless MPO-12 integration into our existing OM4 multimode fiber layout.

102 Helpful vote Comments

L***s

Republic of Korea

Verified Purchase

5 .0

2025-01-10

Excellent compatibility! I was skeptical about mixing them in a multi-brand environment, but they synced seamlessly with our HPE Aruba and Extreme networks. Perfect 40Gbps backhaul solution for campus networking.

88 Helpful vote Comments

c***t

France

Verified Purchase

5 .0

2025-01-08

I recommend this company to everyone, it's much better than expected, no matter its modules or services. Rachel, my consultant, is very helpful, and update me every steps in this purchasing process. When I received my Optical Transceiver Module I had ordered, it was well packaged and worked fine with my switch. If possible, I will buy all my fiber products in l-p.com.

38 Helpful vote Comments

A***k

Taiwan, Province of China

Verified Purchase

5 .0

2024-12-22

Quality at a bargain price. Simply works! Fast and reliable shipping

22 Helpful vote Comments

A***g

United Kingdom

Verified Purchase

5 .0

2024-12-14

Used these 40GBASE-SR4 modules for a multi-brand switch compatibility test. Juniper and Dell worked!

113 Helpful vote Comments

V***v

United States

Verified Purchase

5 .0

2024-11-18

Works Great For A First Timer.

84 Helpful vote Comments

M***a

Panama

Verified Purchase

5 .0

2024-10-17

The 300m transmission distance is exactly what we needed for the new campus fiber setup.

111 Helpful vote Comments

D***n

Portugal

Verified Purchase

5 .0

2024-10-17

Upgraded our data center switches with these LINK-PP 40G transceivers. DOM works perfectly!

151 Helpful vote Comments

M***l

Netherlands

Verified Purchase

5 .0

2024-10-03

Solid MMF transceivers. Arista switch recognized them instantly!

133 Helpful vote Comments

J***n

Indonesia

Verified Purchase

5 .0

2024-09-15

Great value and quality for such an inexpensive product.

71 Helpful vote Comments

R***m

New Zealand

Verified Purchase

5 .0

2024-08-31

Fast shipping, good service, high quality.

64 Helpful vote Comments

C***a

Hong Kong

Verified Purchase

5 .0

2024-06-26

Purchases are usually in store. Always have product in stock

47 Helpful vote Comments

R***y

Bulgaria

Verified Purchase

5 .0

2023-12-11

Best shipping experience in the inter webs

22 Helpful vote Comments

J***e

Spain

Verified Purchase

5 .0

2023-11-29

The order process went well, and I think I received a good value for the item I purchased. It was delivered as scheduled.

91 Helpful vote Comments

E***i

Mexico

Verified Purchase

5 .0

2023-10-27

it was Fast & easy , got the help i need it .

69 Helpful vote Comments

T***i

Italy

Verified Purchase

5 .0

2023-08-14

The staff at l-p.com was extremely helpful and responsive. I greatly appreciated their expertise and guidance as I ordered the 1000BASE-T 10/25/40G Transceiver Modules. I could not have asked for a better experience. Thank you. I will shop again and I will recommend.

98 Helpful vote Comments

D***m

United States

Verified Purchase

5 .0

2023-06-22

My PCB can accept it very well and work perfectly. A painless experience - easy to find the items, easy to order it, and well packed and shipped.

54 Helpful vote Comments

T***r

Canada

Verified Purchase

5 .0

2023-05-30

Had an issue with the post office loosing the shipment. Wrote to Link-pp and the went into action. They sent me a new order without questions and kept in touch with me till the issue was resolved. Thank you.

79 Helpful vote Comments

W***s

Spain

Verified Purchase

5 .0

2023-05-27

Simple order. Good price. Promptly delivered

21 Helpful vote Comments

S***E

Cambodia

Verified Purchase

5 .0