Is this optical module suitable for short-reach inter-rack patching between indoor storage arrays and ToR switches?

Yes, its short-reach 850nm VCSEL transmitter is specifically optimized for high-speed intra-rack and inter-rack MMF interconnects.

Does the metal housing on the LS-MM8525-S3C module cause electrical noise or signal crosstalk in tightly packed server racks?

No, the module features an all-metal enclosure specifically engineered to deliver low Electromagnetic Interference (EMI) across adjacent ports.

Will these transceivers work reliably in fully populated 48-port high-density switch setups without overheating adjacent ports?

Absolutely, each module consumes less than 1.0W from a single 3.3V supply, keeping thermal output low even in high-density switch chassis.

Does the dual-channel internal CDR on this module help reduce signal jitter on high-speed 25.78Gbps links?

Yes, the built-in Clock and Data Recovery (CDR) on both transmitter and receiver channels cleans up electrical jitter for maximum signal integrity.

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Dell 407-BBWK Compatible LINK-PP 25G SFP28 850nm 300m Duplex LC/UPC DOM MMF Optical Transceiver Module

Name: Dell 407-BBWK Compatible LINK-PP 25G SFP28 850nm 300m Duplex LC/UPC DOM MMF Optical Transceiver Module
Brand: LINK-PP
SKU: 218358
Price: 17.028 USD
Availability: InStock
Rating: 4.9 (31 reviews)

# 218358

Product: Dell 407-BBWK Compatible LINK-PP 25G SFP28 850nm 300m Duplex LC/UPC DOM MMF Optical Transceiver Module
SKU: 218358
P/N: LS-MM8525-S3C
Price: $ 19.8
Stock: 1040 in Stock
Sold: 814
Product URL: https://www.l-p.com/products/477617.htm

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31 Reviews

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Manufacture: LINK-PP

P/N: LS-MM8525-S3C

Compatible:: LINK-PP; Arista; Dell; HPE Aruba; HW; Intel; Juniper; Mellanox

Compatible P/N:: 407-BBWK | 100m; 407-BBWK-I | 100m; 407-BBWK | 300m

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Dell 407-BBWK Compatible LINK-PP 25G SFP28 Specifications

Dell 407-BBWK Compatible LINK-PP describes a 25G SFP28 transceiver compliant with the 25GBASE-ESR standard, utilizing 850nm VCSEL technology, a Duplex LC/UPC optical interface, and built-in DOM capabilities, while enabling reliable data transmission across 300m on OM3 MMF.

Dell Part Number	407-BBWK	Vendor Name	LINK-PP
Form Factor	SFP28	Max Data Rate	25.78125Gbps
Wavelength	850nm	Max Cable Distance	300m
Connector	Duplex LC	Media	MMF
Transmitter Type	VCSEL	Receiver Type	PIN
TX Power	-6 to 3dBm	RX Power	-11 to 3dBm
Receiver Sensitivity	-10.3dBm	Receiver Overload	2dBm
DOM	Supported	Operating Temperature range	0°C to +70°C
Protocols	SFP28 MSA Compliant, SFF-8472, SFF-8024, SFF-8431, SFF-8432	Warranty	5 Years

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Q: Is this optical module suitable for short-reach inter-rack patching between indoor storage arrays and ToR switches? By H***e on 2026-03-30

A: Yes, its short-reach 850nm VCSEL transmitter is specifically optimized for high-speed intra-rack and inter-rack MMF interconnects. By admin on 2026-03-31
Q: Does the metal housing on the LS-MM8525-S3C module cause electrical noise or signal crosstalk in tightly packed server racks? By M***t on 2025-12-16

A: No, the module features an all-metal enclosure specifically engineered to deliver low Electromagnetic Interference (EMI) across adjacent ports. By admin on 2025-12-17
Q: Will these transceivers work reliably in fully populated 48-port high-density switch setups without overheating adjacent ports? By V***a on 2025-08-27

A: Absolutely, each module consumes less than 1.0W from a single 3.3V supply, keeping thermal output low even in high-density switch chassis. By admin on 2025-08-28
Q: Does the dual-channel internal CDR on this module help reduce signal jitter on high-speed 25.78Gbps links? By J***t on 2025-04-14

A: Yes, the built-in Clock and Data Recovery (CDR) on both transmitter and receiver channels cleans up electrical jitter for maximum signal integrity. By admin on 2025-04-15

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I***r

Belarus

Verified Purchase

5 .0

2026-05-01

Used in a base station backhaul scenario within a controlled indoor cabinet, these 25G SFP28 modules maintained stable performance even with temperature fluctuations. Optical output and receive sensitivity stayed within expected ranges.

72 Helpful vote Comments

A***e

Germany

Verified Purchase

5 .0

2026-03-27

Upgraded our healthcare facility's indoor fiber backbone from 10G to 25G using these LINK-PP 850nm SFP28 optical transceivers. We reused our existing duplex LC MMF cabling runs spanning up to 200m across telecom closets with zero transmission issues. Real-time DOM metrics gave our NOC team full visibility into optical signal health right out of the box. The clean signal output and low insertion loss allowed us to triple our network bandwidth without replacing a single foot of optical fiber infrastructure.

108 Helpful vote Comments

W***r

Macao

Verified Purchase

5 .0

2026-02-07

Works well with multimode fiber at full 300m distance, no signal degradation noticed.

58 Helpful vote Comments

A***s

Iran, Islamic Republic of

Verified Purchase

5 .0

2026-01-11

Installed 35 units of the LS-MM8525-S3C module into enclosed server cabinets where airflow is limited and thermal management is critical. The low power draw of these SFP28 optics kept overall switch ASIC temperatures low, avoiding fan speed spikes across the rack. DOM telemetry monitored via CLI showed steady 3.3V operating voltage and zero temperature alarms over weeks of continuous operation. They are ideal for energy-conscious data centers needing reliable 25G interconnects.

112 Helpful vote Comments

O***r

United Arab Emirates

Verified Purchase

5 .0

2025-12-09

Deployed these 25G SFP28 modules in our campus fiber network, and they’ve been stable across all multi-mode fiber links under 300m.

58 Helpful vote Comments

S***e

Maldives

Verified Purchase

5 .0

2025-11-15

Perfect for short-range high-speed interconnects! If you need reliable 25G SR optical modules for intra-rack patching, these modules are fantastic. The 850nm VCSEL laser delivers clean eye diagrams and low BER. Makes high-density cabling a breeze.

94 Helpful vote Comments

V***r

Japan

Verified Purchase

5 .0

2025-10-02

Deployed these 25G 850nm SFP28 optical transceivers inside our central indoor distribution cabinets to aggregate high-volume data traffic. The metal housing delivers superior EMI protection, and heat dissipation is excellent even in compact, fully populated switch chassis. Running continuously for over a month, ambient operational temperatures remained safely within the 0°C to 70°C commercial threshold. A highly reliable optical transceiver for any enterprise looking for carrier-grade indoor performance.

94 Helpful vote Comments

T***l

France

Verified Purchase

4 .0

2025-08-24

Very reliable 25G SFP28 transceiver with no performance issues after installation. The only minor concern was that shipping took a few extra days beyond the original estimate, which impacted our project timeline slightly.

28 Helpful vote Comments

L***e

Libyan Arab Jamahiriya

Verified Purchase

5 .0

2025-07-19

In our server cluster interconnect scenario, latency remained low and consistent. No overheating observed even in high-density rack environments.

69 Helpful vote Comments

J***m

Taiwan, Province of China

Verified Purchase

5 .0

2025-05-24

All OK and Fast delivery.

24 Helpful vote Comments

A***n

United Kingdom

Verified Purchase

4 .0

2025-05-08

Product quality is solid and meets all 25GBASE-SR expectations. However, the packaging inside the box was minimal, and adding more cushioning would improve confidence during transit.

22 Helpful vote Comments

M***n

Norway

Verified Purchase

5 .0

2025-04-27

nice site, good products, simple to use!

86 Helpful vote Comments

R***o

France

Verified Purchase

5 .0

2025-04-17

Good value for the price; easy to order and checkout.

111 Helpful vote Comments

M***t

Lithuania

Verified Purchase

5 .0

2025-04-06

For a recent data center upgrade project, we replaced older 10G SR modules with these 25G SFP28 optics transceivers. The transition was seamless, and bandwidth improvement was immediate without re-cabling.

113 Helpful vote Comments

D***t

United States

Verified Purchase

5 .0

2025-02-21

Replacing budget transceivers with these LINK-PP 25G MMF modules eliminated the frequent link flapping we experienced on our server links. The duplex LC/UPC connector housing features a sturdy bail latch that locks firmly without getting stuck during cabinet maintenance. Links established immediately at 25.78Gbps upon insertion, delivering flawless line-rate throughput across our 250m multimode fiber patch cords. They provide the perfect blend of physical durability and high-speed optical reliability.

86 Helpful vote Comments

R***e

Mexico

Verified Purchase

5 .0

2025-01-13

Excellent support, super Fast delivery, competitive pricing & very good 10/25/40G Transceiver Modules (cant see differences vs other brands) - highly recommend.

92 Helpful vote Comments

H***d

Cambodia

Verified Purchase

5 .0

2025-01-03

Awesome optics for data center top-of-rack links! Bought a batch of these LS-MM8525-S3C 25G SFP28 modules to link our edge switches to our core aggregation layer over multi-mode fiber cable. DDM metrics on our switch stack are spot on with accurate Rx/Tx optical power readings. Highly recommended for cost-conscious sysadmins!

94 Helpful vote Comments

T***a

New Zealand

Verified Purchase

5 .0

2024-12-11

A pleasure to use the site. Prompt delivery. Thank you.

40 Helpful vote Comments

D***n

Republic of Korea

Verified Purchase

5 .0

2024-09-05

First purchase! Good price and Fast shipping. I will test it and give some feedback soon.

43 Helpful vote Comments

R***g

Brazil

Verified Purchase

5 .0

2024-07-13

very satisfied ^^ thank you Fiberstore.

79 Helpful vote Comments

B***e

United States

Verified Purchase

5 .0

2024-06-21

The quality of the product is excellent. 5 stars for it

16 Helpful vote Comments

T***r

Philippines

Verified Purchase

5 .0

2024-06-11

High quality pre-sale support and prompt shipping.

55 Helpful vote Comments

W***g

Japan

Verified Purchase

5 .0

2024-06-01

We have tried them and they worked perfectly with our equipment. Solid performance. I will definitely buy more to connect my switches. Thank you for a wonderful product.

89 Helpful vote Comments

E***i

United States

Verified Purchase

5 .0

2024-01-14

Work as described.

18 Helpful vote Comments

A***a

United States

Verified Purchase

5 .0