We are building an 802.3by 25G Ethernet campus backbone. Is the LS-MM8525-S1I module fully compliant with standard 25GBASE-SR?

Yes. The module fully complies with IEEE 802.3by 25GBASE-SR, SFF-8431, and SFF-8432 specifications, making it fully interoperable with any standard 25GBASE-SR optical port.

Is the metal housing rugged enough to withstand continuous mechanical vibration near industrial railway machinery?

Yes, the die-cast zinc housing and sturdy bail-latch mechanism provide heavy-duty vibration resistance and superior EMI shielding.

We have existing OM3 fiber patch cables in our building. What distance can the LS-MM8525-S1I module reach compared to OM4 fiber?

The LS-MM8525-S1I 25G SFP28 module reaches up to 70m over OM3 multimode fiber and up to 100m over high-bandwidth OM4 multimode fiber.

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LINK-PP LS-MM8525-S1I 25G SFP28 850nm 100m Duplex LC/UPC DOM MMF Optical Transceiver Module (Industrial)

Name: LINK-PP LS-MM8525-S1I 25G SFP28 850nm 100m Duplex LC/UPC DOM MMF Optical Transceiver Module (Industrial)
Brand: LINK-PP
SKU: 181535
Price: 36.12 USD
Availability: InStock
Rating: 5 (44 reviews)

# 181535

Product: LINK-PP LS-MM8525-S1I 25G SFP28 850nm 100m Duplex LC/UPC DOM MMF Optical Transceiver Module (Industrial)
SKU: 181535
P/N: LS-MM8525-S1I
Price: $ 42
Stock: 859 in Stock
Sold: 1.3K
Product URL: https://www.l-p.com/products/476099.htm

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Manufacture: LINK-PP

P/N: LS-MM8525-S1I

Compatible:: Cisco; LINK-PP; Arista; Brocade; Dell; H3C; HW; Intel; Juniper; Mellanox

Compatible P/N:: LS-MM8525-S1C; LS-MM8525-S1I | 100m; LS-MM8525-S3C | 300m; LS-MM8525E-S1C | 100m; LS-MM8525E-S3C | 300m

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LINK-PP LS-MM8525-S1I 25G SFP28 Specifications

LINK-PP LS-MM8525-S1I is an industrial-grade 25GBSE-SR SFP28 optical transceiver operating at 850nm with duplex LC/UPC connectors, integrated DOM for real-time monitoring, and specified reaches of 70m over OM3 MMF or 100m over OM4 MMF across an industrial temperature range of -40°C to +85°C.

LINK-PP Part Number	LS-MM8525-S1I	Vendor Name	LINK-PP
Form Factor	SFP28	Max Data Rate	25.7813Gbps
Wavelength	850nm	Max Cable Distance	70m over OM3 MMF 100m over OM4 MMF
Connector	Duplex LC	Media	MMF
Transmitter Type	VCSEL	Receiver Type	PIN
Receiver Sensitivity	＜-10.3dBm	DDM/DOM	Supported
Operating Temperature Range	-40 to 85°C	Protocols	IEEE 802.3by, SFF-8472, SFF-8432, SFP28 MSA, CPRI, eCPRI

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Q: We are building an 802.3by 25G Ethernet campus backbone. Is the LS-MM8525-S1I module fully compliant with standard 25GBASE-SR? By X***t on 2026-01-24

A: Yes. The module fully complies with IEEE 802.3by 25GBASE-SR, SFF-8431, and SFF-8432 specifications, making it fully interoperable with any standard 25GBASE-SR optical port. By admin on 2026-01-25
Q: Is the metal housing rugged enough to withstand continuous mechanical vibration near industrial railway machinery? By F***n on 2025-10-22

A: Yes, the die-cast zinc housing and sturdy bail-latch mechanism provide heavy-duty vibration resistance and superior EMI shielding. By admin on 2025-10-23
Q: We have existing OM3 fiber patch cables in our building. What distance can the LS-MM8525-S1I module reach compared to OM4 fiber? By I***e on 2025-05-07

A: The LS-MM8525-S1I 25G SFP28 module reaches up to 70m over OM3 multimode fiber and up to 100m over high-bandwidth OM4 multimode fiber. By admin on 2025-05-08

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N***n

Denmark

Verified Purchase

5 .0

2026-05-22

Was concerned about multi-vendor compatibility in our mixed switch fabric. Requested pre-coded MSA optics upon ordering — and the vendor delivered! DOM parameters show real-time temperature, voltage, and optical power cleanly in our switch OS. Very impressed with how seamless the integration was.

99 Helpful vote Comments

W***e

Philippines

Verified Purchase

5 .0

2026-04-12

Flawless 25G connectivity.

51 Helpful vote Comments

P***s

Hungary

Verified Purchase

5 .0

2026-03-17

Managing mixed-vendor switch environments often leads to optic compatibility issues and EEPROM errors. We requested custom pre-coding for these SFP28 modules upon ordering, and they performed flawlessly across our entire multi-vendor switch network. The switches instantly recognized the 25GBASE-SR optics, displaying clean serial numbers and accurate diagnostic data without requiring CLI override commands. Link auto-negotiation over LC/UPC multimode fiber was immediate, making them a truly turnkey choice for complex network backbones.

124 Helpful vote Comments

L***r

Ireland

Verified Purchase

5 .0

2026-02-28

Bulletproof transceiver! Installed in our aggregation switches; zero packet loss across 80m OM4 multi-mode fiber runs.

43 Helpful vote Comments

L***y

Indonesia

Verified Purchase

5 .0

2026-01-27

Deploying 100 of these 25GBSE-SR SFP28 modules across our regional data center interconnects. The hot-swappable design allowed seamless live upgrades without rebooting the core switch chassis. Highly recommended for any network team scaling up to 25G.

85 Helpful vote Comments

S***e

Poland

Verified Purchase

5 .0

2025-11-23

Deploying field communications cabinets where internal temperatures swing wildly between winter and summer (-30°C to +70°C). Standard commercial optics always overheat or fail. These industrial-grade (-40°C to +85°C) modules haven't dropped a single frame in four months of continuous operation.

111 Helpful vote Comments

M***t

Russian Federation

Verified Purchase

5 .0

2025-11-19

Upgraded our ToR switches to 25GBASE-SR modules. These duplex LC multimode optical transceivers fit snugly into standard SFP28 slots. Running full 25Gbps line rate across 85m OM4 multimode fiber patch cords. Low power consumption keeps our chassis thermals cool. Will definitely order another batch for our next rack expansion.

116 Helpful vote Comments

J***e

Bulgaria

Verified Purchase

5 .0

2025-10-29

Substation and factory environments expose networking gear to heavy electromagnetic interference (EMI) and extreme physical vibration. The rugged zinc-alloy casing and gold-plated contact pins of the LS-MM8525-S1I provide superior structural integrity and electrical shielding. We verified uninterrupted 25Gbps data transmission right next to high-voltage equipment in high-heat conditions. The latching mechanism holds firm in high-vibration racks, making it ideal for industrial automation networks.

138 Helpful vote Comments

D***t

South Africa

Verified Purchase

5 .0

2025-09-28

High-speed bliss. Upgraded our core storage cluster to 25G SFP28—massive throughput bump for our SAN environment!

98 Helpful vote Comments

L***d

Argentina

Verified Purchase

4 .0

2025-08-18

This industrial SFP28 optical transceiver performs reliably even in higher temperature environments, but the outer packaging showed some wear during transit. Fortunately, the module inside was well protected and fully functional.

30 Helpful vote Comments

A***l

Turkey

Verified Purchase

5 .0

2025-07-02

Installed in our core routing infrastructure for high-bandwidth video traffic. The 850nm VCSEL transmitter provides strong signal clarity over 90m OM4 LC fiber optic patch cables. No CRC errors recorded after 30 days of continuous heavy load.

76 Helpful vote Comments

C***y

Romania

Verified Purchase

5 .0

2025-06-09

We were looking for industrial-grade 25G SFP28 850nm modules for our outdoor distribution nodes. OEM prices were way too high. Ordered 50 units of the LS-MM8525-S1I module; all plugged straight into our aggregation switches with flawless compatibility. DDM optical Rx/Tx levels are well within specification. Super happy with the build quality!

75 Helpful vote Comments

G***g

Ukraine

Verified Purchase

4 .0

2025-05-23

Performance is solid across our OM4 fiber links, and DOM readings are accurate. The only downside was that the package arrived a couple of days late, which slightly delayed our installation schedule.

27 Helpful vote Comments

G***n

New Zealand

Verified Purchase

5 .0

2025-03-08

Solid industrial temp performance. Running rock solid in our unconditioned outdoor enclosure at -20°C ambient without any drops.

79 Helpful vote Comments

S***s

Malaysia

Verified Purchase

5 .0

2025-02-02

We deployed 30 units of the LS-MM8525-S1I SFP28 optical module across our spine-leaf switch fabric using 75m OM4 LC duplex multimode cables. During our 72-hour continuous stress test, the 850nm VCSEL transmitter maintained an exceptionally stable optical output, while receiver sensitivity stayed well above standard limits. We verified full DOM functionality via the switch CLI, reading accurate real-time optical power levels and temperatures with zero packet drops under 100% line-rate load. It delivers top-tier performance for high-density server rack uplinks.

109 Helpful vote Comments

S***s

Thailand

Verified Purchase

5 .0

2025-01-11

Using this SFP28 module for 25G uplinks between racks, DOM helps a lot with monitoring TX/RX power. Pretty stable so far!

60 Helpful vote Comments

Y***p

Italy

Verified Purchase

5 .0

2024-06-07

As always, prompt fulfillment and delivered as advertised.

55 Helpful vote Comments

J***h

Indonesia

Verified Purchase

5 .0

2024-05-24

The website is simple to search and they always have what I want.

68 Helpful vote Comments

A***a

Hong Kong

Verified Purchase

5 .0

2024-05-03

Just received my order today and it is exactly what I wanted!

52 Helpful vote Comments

J***s

Philippines

Verified Purchase

5 .0

2024-05-02

Nothing to complain, except the slow delivery. Hope it would be Faster the next time.

27 Helpful vote Comments

G***n

United States

Verified Purchase

5 .0

2024-03-12

Found exactly what I wanted, quickly and easily, at the best price. Looking forward to delivery.

64 Helpful vote Comments

J***n

Ukraine

Verified Purchase

5 .0

2024-03-07

Delivery was prompt, product was as advertised. Good job overall.

69 Helpful vote Comments

M***n

Ukraine

Verified Purchase

5 .0

2024-02-15

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

93 Helpful vote Comments

F***l

United States

Verified Purchase

5 .0

2024-02-04

I am totally amazed by the so competitive price for the Transceiver Module. I bought 4pcs for test in advance, which work well on my switches. The price is much cheaper than original. What's more, the quality is pretty well, which has life warranty for it. Great product.

29 Helpful vote Comments

D***z

Ukraine

Verified Purchase

5 .0

2024-01-25

i love the clock that shows you how long you have to order to get tommorow.

86 Helpful vote Comments

S***e

United Arab Emirates

Verified Purchase

5 .0

2024-01-09

Very good service, l-p.com would be helpful just in case you need more help.

98 Helpful vote Comments

M***y

Morocco

Verified Purchase

5 .0

2024-01-06

Every order, every time - is quick and simple to process, arrives on time, never had an issue with the product, a return, etc. They often have the best price, and product you can't always find elsewhere.

59 Helpful vote Comments

M***l

Morocco

Verified Purchase

5 .0

2023-12-24

products are always great with nice package and high quality

86 Helpful vote Comments

J***u

Lithuania

Verified Purchase

5 .0

2023-12-05

Excellent prices, large selection, and Fast service. Ordering is quick and easy.

88 Helpful vote Comments

S***c

Norway

Verified Purchase

5 .0

2023-12-04

Link-pp has everything that I need in stock, with the best prices and the Fastest shipping. Shopping here is always a fantastic experience for me. I love Link-pp and will continue to use it as my provider for all of my Sfp Cage needs!

49 Helpful vote Comments

z***n

Germany

Verified Purchase

5 .0

2023-09-30

Never had a single issue. Will continue to buy products from Link pp next time.

57 Helpful vote Comments

T***t

Brazil

Verified Purchase

5 .0