Does this support OM3 and OM4 fiber, and what is the max run distance we can push?

Yes, it features a Duplex LC UPC interface explicitly designed for Multi-Mode Fiber (MMF). It perfectly supports OM2, OM3, and OM4 fiber types. You can reliably achieve gigabit data rates up to a 550-meter transmission distance over 850nm wavelengths, ideal for standard campus and warehouse fiber runs.

We are upgrading an entire campus network and need about 500 units of these 850nm SFPs. Do you guys offer any B2B bulk pricing tiers?

Yes, we definitely support enterprise deployments! We offer tiered wholesale discounts for large volume orders. Please reach out to our B2B sales team directly, and we’ll prepare a custom quote to help optimize your project budget.

Our enterprise strictly requires all network hardware to meet environmental and safety standards. Is this transceiver RoHS and ISO certified?

Yes, it is fully compliant with stringent industry standards. The LS-MM851G-S5I meets Directive (EU) 2015/863 of RoHS, holds ISO14001 environmental management certification, and satisfies Class I laser safety requirements, ensuring 100% compliance for corporate IT procurement.

Hey, we run a mixed rack of Cisco Catalyst and Ubiquiti EdgeSwitches. Will this LS-MM851G-S5I 1G module play nice without throwing unsupported transceiver errors?

Absolutely! These transceivers fully comply with the SFP Multi-Source Agreement (MSA). They are meticulously coded and tested to ensure seamless plug-and-play interoperability across all major switch brands like Cisco, Ubiquiti, Juniper, and Aruba without triggering any vendor-lock warnings.

We plan to deploy these in unventilated outdoor NEMA enclosures for cell tower backhaul. Can it handle extreme summer heat and winter freezing?

Definitely. This is a true industrial-grade optical transceiver designed for harsh environments. It supports an extended operating temperature range (from -40°C to 85°C), making it the perfect choice for outdoor cabinets, industrial IoT, and factory floors where standard commercial optics would fail.

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LINK-PP LS-MM851G-S5I 1G SFP 850nm 550m Duplex LC DOM MMF Optical Transceiver Module (Industrial)

Name: LINK-PP LS-MM851G-S5I 1G SFP 850nm 550m Duplex LC DOM MMF Optical Transceiver Module (Industrial)
Brand: LINK-PP
SKU: 183251
Price: 5.16 USD
Availability: InStock
Rating: 4.9 (25 reviews)

Product: LINK-PP LS-MM851G-S5I 1G SFP 850nm 550m Duplex LC DOM MMF Optical Transceiver Module (Industrial)
SKU: 183251
P/N: LS-MM851G-S5I
Price: $ 6
Stock: 980 in Stock
Sold: 1.1K
Product URL: https://www.l-p.com/products/476091.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

5 Questions

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$ 6

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

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Manufacture: LINK-PP P/N: LS-MM851G-S5I SKU: 183251

Compatible:: Cisco; LINK-PP; Adtran; Alcatel-Lucent; Arista; Avaya; Brocade; Calix; Ciena; Dahua; Dell; Extreme; FS; Fortinet; Generic; H3C; HW; IBM; Intel; Juniper; Mikrotik; Moxa; NVIDIA/Mellanox; Netgear

Compatible P/N:: LS-MM851G-S5C | 550m; LS-MM851G-S5I | 550m; LS-MM311G-02AC | 2km; LS-MM311G-02AI | 2km; LS-MM311G-02C | 2km; LS-MM311G-02I | 2km; LS-MM851G-02C | 2km; LS-MM851G-02I | 2km

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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 LS-MM851G-S5I 1G SFP Specifications

The LINK-PP LS-MM851G-S5I is an industrial-grade 1G SFP transceiver engineered for reliable Gigabit Ethernet over multi-mode fiber. Operating at an 850nm wavelength, it supports transmission distances up to 550 meters via duplex LC interfaces. This hot-pluggable module features digital optical monitoring (DOM) and thrives in harsh environments from -40°C to +85°C.

LINK-PP Part Number	LS-MM851G-S5I	Vendor Name	LINK-PP
Form Factor	SFP	Max Data Rate	1.25Gbps
Wavelength	850nm	Max Cable Distance	550m
Connector	Duplex LC	Media	MMF
Transmitter Type	VCSEL	Receiver Type	PIN
TX Power	-9 to 0dBm	RX Power	-20 to -1dBm
Receiver Sensitivity	-18dBm	DOM Support	Yes
Operating Temperature Range	-40 to 85°C	Protocols	IEEE 802.3z, SFF-8472, FC-PI, SFP MSA (INF-8074i) Compliant

Key Features of LINK-PP LS-MM851G-S5I 1G SFP

Designed for mission-critical networks, this module offers a robust VCSEL transmitter, PIN receiver, and standard compliance with SFP MSA and IEEE 802.3z. Its outstanding thermal design eliminates the need for active cooling, minimizing power consumption under 1W while delivering exceptional electromagnetic interference resistance.

LINK-PP LS-MM851G-S5I 1G SFP Optical Module

This low-power 1000BASE-SX optical transceiver ensures reliable data throughput across diverse network architectures. It delivers optimal electro-optical performance, low latency, and consistent signal integrity for challenging industrial deployments.

LS-MM851G-S5I: 1G Connectivity for Industrial Ethernet

Engineered specifically for heavy industrial applications, this SFP transceiver guarantees flawless 1.25Gbps throughput. It provides ruggedized infrastructure links for automation, traffic control, and substation communication systems.

LS-MM851G-S5I Module with 850nm Wavelength

Utilizing a highly efficient 850nm VCSEL laser source, the transceiver delivers a stable optical budget and low attenuation. This makes it perfect for short-range high-bandwidth interconnections within local networks.

LS-MM851G-S5I Module Supporting 550m Transmission

This module enables reliable data transmission up to 550 meters over OM2 multi-mode fiber. It effectively connects separate building facilities and localized industrial sub-stations without experiencing significant signal degradation.

LS-MM851G-S5I Module with Duplex LC Interface

Featuring an industry-standard duplex LC connector, the module guarantees secure physical connection and structural stability. Its low insertion loss design ensures precise alignment and seamless fiber patch cable integration.

LS-MM851G-S5I Module with DOM for Real-Time Monitoring

Equipped with built-in Digital Optical Monitoring (DOM) per SFF-8472, the transceiver provides live tracking of temperature, voltage, and optical power. This enables proactive fault isolation and efficient network maintenance.

LINK-PP LS-MM851G-S5I 1G SFP Certification

Every LINK-PP transceiver undergoes comprehensive validation compliance to meet strict international standards, ensuring safe operation, environmental sustainability, and guaranteed regulatory approval for global deployments.

LS-MM851G-S5I Quality Testing Program

Our rigorous multicomponent quality testing program inspects structural, electronic, and optical elements. This thorough procedure guarantees that each optical module leaves the factory with zero operational defects.

LS-MM851G-S5I Quality Certifications

This high-performance industrial transceiver is fully certified with CE, FCC, RoHS, and UL approvals, confirming strict compliance with world-class environmental health and manufacturing safety criteria.

LS-MM851G-S5I Certified for Reliable Host-Device Compatibility

Extensively tested on multiple platforms, this SFP ensures broad hardware compatibility and seamless interoperability with major industrial switches, media converters, and router brands worldwide.

Rigorous Testing Ensures Reliable SFP Performance

LINK-PP utilizes advanced optoelectronic test benches to validate every performance metric, guaranteeing that each industrial transceiver achieves uncompromising stability.

Rigorous Testing Ensures Reliable Transceiver Performance

Optical Spectrum Test

Measures central wavelength and spectral width to ensure absolute conformity with the 850nm transmission standard.

Eye Pattern Test

Evaluates transmitter signal integrity and timing margins to eliminate jitter and waveform distortion.

Bit Error Rate Test

Validates data transmission accuracy across extended runtimes, ensuring flawless packet delivery under full load.

Temperature Test

Subjects modules to thermal cycles from -40°C to +85°C to verify industrial-grade reliability.

Product Shipping for LINK-PP LS-MM851G-S5I 1G SFP

We implement standardized, premium logistic workflows to protect your high-frequency optical components throughout transit, ensuring safe arrival and immediate deployment.

Anti-Static Protective Packaging

Enclosed in individual ESD-safe packaging to prevent static damage during handling.

Shock-Resistant Transport Protection

Cushioned by premium high-density foam inserts to absorb transport vibrations and impacts.

Fast Order Processing and Dispatch

Orders are streamlined through computerized warehouse systems for immediate domestic and international dispatch.

Global Logistics and International Delivery

Shipped via top-tier express couriers to guarantee transparent tracking and timely arrival.

LINK-PP LS-MM851G-S5I 1G SFP Usage Demonstration

The plug-and-play design allows for rapid hot-swappable installation into any active industrial network switch. Simply insert the module into the SFP slot, connect the duplex LC multi-mode fiber cable, and enjoy instant, stable connectivity.

LS-MM851G-S5I 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 LS-MM851G-S5I 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 LS-MM851G-S5I 1G SFP 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

Model Comparison Table

	Current Model LS-MM851G-S5I	LS-MM851G-02I	LS-MM851G-02C	LS-MM311G-02AI	LS-MM311G-02AC

Compatible	LINK-PP	LINK-PP	LINK-PP	LINK-PP	LINK-PP
Data Rate (Max)	1.25Gbps	1.25Gbps	1.25Gbps	1.25Gbps	1.25Gbps
Wavelength	850nm	850nm	850nm	1310nm	1310nm
Connector	Duplex LC	Duplex LC	Duplex LC	Duplex LC	Duplex LC
Cable Distance (Max)	550m	2km	2km	2km	2km
Cable Type	MMF	MMF	MMF	MMF	MMF
TX Power	-9 to 0dBm	-9 to 0dBm	-9 to 0dBm	-12 to -3dBm	-12 to -3dBm
Receiver Sensitivity	-18dBm	-18dBm	-18dBm	-30dBm	-30dBm
Operating Temperature	-40 to 85°C	-40 to 85°C	0 to 70°C	-40 to 85°C	0 to 70°C
Form Factor	SFP	SFP	SFP	SFP	SFP
Transmitter Type	VCSEL	VSCEL	VSCEL	FP	FP
Receiver Type	PIN	PIN	PIN	PIN	PIN
DOM Support	Yes	Yes	Yes	Yes	Yes
Protocols	IEEE 802.3z, SFF-8472, FC-PI, SFP MSA (INF-8074i) Compliant	IEEE 802.3z, SFF-8472, FC-PI, SFP MSA (INF-8074i) Compliant	IEEE 802.3z, SFF-8472, FC-PI, SFP MSA (INF-8074i) Compliant	SFF-8472 MSA IEEE 802.3	SFF-8472 MSA IEEE 802.3

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Q: Does this support OM3 and OM4 fiber, and what is the max run distance we can push? By J***s on 2026-05-07

A: Yes, it features a Duplex LC UPC interface explicitly designed for Multi-Mode Fiber (MMF). It perfectly supports OM2, OM3, and OM4 fiber types. You can reliably achieve gigabit data rates up to a 550-meter transmission distance over 850nm wavelengths, ideal for standard campus and warehouse fiber runs. By admin on 2026-05-07
Q: We are upgrading an entire campus network and need about 500 units of these 850nm SFPs. Do you guys offer any B2B bulk pricing tiers? By R***n on 2026-04-23

A: Yes, we definitely support enterprise deployments! We offer tiered wholesale discounts for large volume orders. Please reach out to our B2B sales team directly, and we’ll prepare a custom quote to help optimize your project budget. By admin on 2026-04-23
Q: Our enterprise strictly requires all network hardware to meet environmental and safety standards. Is this transceiver RoHS and ISO certified? By P***z on 2026-03-20

A: Yes, it is fully compliant with stringent industry standards. The LS-MM851G-S5I meets Directive (EU) 2015/863 of RoHS, holds ISO14001 environmental management certification, and satisfies Class I laser safety requirements, ensuring 100% compliance for corporate IT procurement. By admin on 2026-03-20
Q: Hey, we run a mixed rack of Cisco Catalyst and Ubiquiti EdgeSwitches. Will this LS-MM851G-S5I 1G module play nice without throwing unsupported transceiver errors? By C***e on 2026-01-12

A: Absolutely! These transceivers fully comply with the SFP Multi-Source Agreement (MSA). They are meticulously coded and tested to ensure seamless plug-and-play interoperability across all major switch brands like Cisco, Ubiquiti, Juniper, and Aruba without triggering any vendor-lock warnings. By admin on 2026-01-12
Q: We plan to deploy these in unventilated outdoor NEMA enclosures for cell tower backhaul. Can it handle extreme summer heat and winter freezing? By M***t on 2025-12-24

A: Definitely. This is a true industrial-grade optical transceiver designed for harsh environments. It supports an extended operating temperature range (from -40°C to 85°C), making it the perfect choice for outdoor cabinets, industrial IoT, and factory floors where standard commercial optics would fail. By admin on 2025-12-25

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B***n

Belgium

Verified Purchase

5 .0

2026-05-21

Easily pushed 500m over OM2. Great industrial 1G SFP 850nm module for the price.

54 Helpful vote Comments

R***t

Switzerland

Verified Purchase

5 .0

2026-05-04

Cheap and reliable 1000BASE-SX modules for our racks.

201 Helpful vote Comments

W***e

Italy

Verified Purchase

5 .0

2026-04-20

Fast shipping to NY, perfect LC fiber interfaces!

183 Helpful vote Comments

J***n

Viet Nam

Verified Purchase

5 .0

2026-04-06

Fantastic OEM compatibility. Plugged right into our Juniper gear with zero vendor lock-in issues.

189 Helpful vote Comments

S***r

Netherlands

Verified Purchase

5 .0

2026-03-28

Impressive Class I laser safety and strict ISO14001 compliance. We bulk deployed these across our enterprise access switches. The VSCEL transmitter and MCU control unit deliver extremely low-power, high-reliability gigabit performance.

201 Helpful vote Comments

S***n

Poland

Verified Purchase

5 .0

2026-03-04

Deployed 50 of these LINK-PP LS-MM851G-S5I modules in our Berlin datacenter. Total lifesaver!

198 Helpful vote Comments

J***n

Austria

Verified Purchase

5 .0

2026-02-24

Awesome Cisco compatible 1G SFP, buying more soon.

46 Helpful vote Comments

E***s

France

Verified Purchase

5 .0

2026-02-21

VCSEL laser handles the gigabit throughput effortlessly. ⚡

157 Helpful vote Comments

M***s

Poland

Verified Purchase

5 .0

2026-02-18

SFF-8472 DOM works perfectly in our Mikrotik.

195 Helpful vote Comments

N***z

Viet Nam

Verified Purchase

5 .0

2025-11-18

Real-time DOM monitoring is a game changer for troubleshooting our campus fiber networking.

199 Helpful vote Comments

S***n

Italy

Verified Purchase

5 .0

2025-10-25

Excellent UK supplier for cheap industrial SFP modules. Quality PIN photodiode and solid casing.

136 Helpful vote Comments

W***z

Brazil

Verified Purchase

5 .0

2025-10-05

Upgrading our UK campus network was a breeze with this LINK-PP LS-MM851G-S5I. Verified SFP Multi-Source Agreement compatibility across multiple vendors. The 550m transmission distance over OM3 multimode fiber is incredibly consistent!

160 Helpful vote Comments

J***s

Chile

Verified Purchase

4 .0

2025-09-12

Box was slightly crushed during shipping, but the 1000BASE-SX industrial module works flawlessly.

22 Helpful vote Comments

L***k

Chile

Verified Purchase

5 .0

2025-08-15

Flawless DDM integration on my Ubiquiti switches.

197 Helpful vote Comments

C***z

Venezuela

Verified Purchase

5 .0

2025-07-22

Solid 550m multimode SFP, works exactly as advertised.

172 Helpful vote Comments

J***h

Tunisia

Verified Purchase

4 .0

2025-07-16

Delivery took an extra day. The 1G SFP 850nm transceivers are rock solid though!

13 Helpful vote Comments

R***r

Costa Rica

Verified Purchase

5 .0

2025-07-04

Industrial temp SFP survived our harsh factory environment.

173 Helpful vote Comments

S***n

Sweden

Verified Purchase

5 .0

2025-06-28

Great duplex LC MMF transceiver, zero packet loss.

157 Helpful vote Comments

L***n

Ecuador

Verified Purchase

5 .0

2025-06-04

Needed a cost-effective 1000BASE-SX solution for our warehouse IP camera rollout. These duplex LC MMF modules synced instantly with our mixed Cisco and Aruba topology. Outstanding ROI and zero dropped frames.

88 Helpful vote Comments

P***s

Tunisia

Verified Purchase

5 .0

2025-05-27

Plug and play 850nm optics for outdoor cabinets! ❄️

58 Helpful vote Comments

D***n

Viet Nam

Verified Purchase

5 .0

2025-05-01

Tested these 1G SFP 850nm 550m DOM transceivers in our ruggedized outdoor edge cabinets. The industrial temp range (-40 to 85C) handles Texas summers effortlessly. DDM readings remain perfectly stable under heavy load!

180 Helpful vote Comments

M***k

United States

Verified Purchase

5 .0

2025-04-16

Using these in outdoor NEMA enclosures in Arizona. The industrial wide-temp rating is legit! ☀️

177 Helpful vote Comments

M***n

Panama

Verified Purchase

5 .0