SFP-10/25G-LR-S – 10/25GBASE-LR SFP28 – 1310nm 10km SMF Transceiver

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SFP-10/25G-LR-S Description

SFP-10/25G-LR-S is a Cisco long-range SFP28 optical transceiver module that supports both 10G and 25G Ethernet connections over single-mode fiber (SMF). With a reach of up to 10 kilometers and an industry-standard LC duplex interface, this module is ideal for data center backbone, campus distribution, and inter-building links. SFP-10/25G-LR-S enables seamless network upgrades, offering dual-rate capability and requiring RS-FEC for optimal 25G operation. This hot-swappable module delivers robust performance and reliability for demanding enterprise, service provider, and cloud environments, and is also referred to as Cisco 25G LR SFP28 or 10/25G SFP28 LR.

Product Highlights

Data Rate
Wavelength
Max. Distance

Key Features

Application:

  • Designed for long-distance 10G/25G Ethernet links across campus, metro, or inter-building networks (up to 10km).
  • Used in data center backbones, enterprise distribution layers, and carrier infrastructure.

Functionality:

  • Dual-rate operation enables seamless upgrades from 10G to 25G without hardware replacement.
  • Requires RS-FEC for reliable 25G performance.
  • SMF compatibility ensures minimal signal loss and optimal transmission over long distances.

Industries:

  • Telecommunications, large enterprise, government, metro Ethernet, cloud service providers.

Application Scenarios

Long-Distance Data Center Backbones

Connects data centers, buildings, or campus sites with 10km single-mode fiber, ensuring high bandwidth and low latency for mission-critical applications.

Campus & Metro Aggregation

Ideal for large enterprise or carrier networks requiring high-speed distribution between distant locations or across metropolitan areas.

Hybrid-Speed Network Upgrades

Supports both 10G and 25G speeds, enabling gradual network upgrades without changing transceiver hardware, suitable for mixed-generation infrastructure.

Model comparison

Parameter

SFP-10/25G-LR-S

SFP-10/25G-CSR-S

SFP-25G-SR-S

Form Factor

SFP28

SFP28

SFP28

Data Rate

10/25 Gbps

10/25 Gbps

25 Gbps

Wavelength

1310 nm

850 nm

850 nm

Fiber Type

SMF

MMF

MMF

Max. Distance

10 km

300m (OM3)/400m (OM4)

70m (OM3)/100m (OM4)

Power Consumption

1.3 W

1.2 W

1.2 W

Operating Temp.

0~70°C

0~70°C

0~70°C

FEC Requirement

RS-FEC (25G)

RS-FEC (25G)

RS-FEC required

Hot-swappable

Yes

Yes

Yes

Connector

LC Duplex

LC Duplex

LC Duplex

Rate Support

10G/25G

10G/25G

25G only

Platform Compatibility

SFP-25G-SR-S is compatible with a wide range of Cisco devices equipped with SFP28 ports, including but not limited to:

  • Cisco Nexus 9000 Series Switches
  • Cisco Nexus 3000 and 7000 Series Switches
  • Cisco Catalyst 9000 Series Switches (e.g., 9300, 9400, 9500)
  • Cisco Catalyst 3850/4500-X Series with SFP28 slots
  • Cisco UCS Servers with SFP28 uplinks

Safety & Compliance

This product meets the following standards and compliance requirements:

  • IEEE Standards:
    • IEEE 802.3by (25GBASE Ethernet)
    • IEEE 802.3cc (25GBASE over SMF)
  • SFP28 MSA:
    • SFF-8402: SFP+ 28 Gb/s 1x Pluggable Transceiver Solution
    • SFF-8472: Diagnostic Monitoring Interface for Optical Transceivers
  • Safety:
    • Laser Class 1 (IEC 60825-1)
    • Laser Class 1 (21CFR-1040 LN#50 7/2001)
  • Environmental:
    • RoHS 6 compliant
    • Cable jacket of SFP copper modules is UL E116441 Compliant
    • ELV (End-of-Life Vehicle) compliant for SFP copper cables
  • Product Material Content:
    • Conforms to WEEE regulations (electronic waste and recycling)
    • Cisco Takeback and Reuse Program supported

Specifications

Parameter Value
Product Model SFP-10/25G-LR-S
Form Factor SFP28
Data Rate 10/25 Gbps (dual-rate)
Wavelength 1310 nm
Interface LC Duplex (PC/UPC)
Cable Type Single-Mode Fiber (SMF, G.652)
Max. Distance 10 km
Transmit Power (max/min) +2.0 dBm / -7.0 dBm (25G)
+0.5 dBm / -8.2 dBm (10G)
Receive Power (max/min) +2.0 dBm / -13.3 dBm (25G)
+0.5 dBm / -14.4 dBm (10G)
Power Consumption 1.3 W
Operating Temperature 0 to 70°C (32 to 158°F)
Storage Temperature -40 to 85°C (-40 to 185°F)
FEC Requirement RS-FEC required for 25G
Connector Dual LC/PC
Compliance IEEE 802.3by, SFF-8402, SFF-8472, RoHS 6

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Need pricing, stock, or shipping details for the SFP-10/25G-LR-S ? Layer23-Switch can help you check current availability, lead time, and delivery options for this. Send us the part number, quantity, and destination country via live chat or email sales@layer23-switch.com for a fast quotation.

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    Madison Kelly
    Posted on 22/02/2026
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    5.0

    Was worried about buying from a third party, but the product is 100% genuine.

    Samantha Vasquez
    Posted on 20/02/2026
    Verified Buyer
    5.0

    Layer23 has been my go-to source for over a year now.

    Heather Martin
    Posted on 21/01/2026
    Verified Buyer
    4.0

    Glad I trusted my research. Layer23 was the right choice.

    Jill Valentine
    Posted on 05/10/2024
    Verified Buyer
    5.0

    Locked and loaded… into the SFP port. Link up immediately. Professional service.

    Albert Wesker
    Posted on 12/07/2024
    Verified Buyer
    5.0

    Superior performance. Complete global saturation… of network coverage achieved.

Questions & Answers

  • What is Cisco SFP-10/25G-LR-S used for?

    Cisco SFP-10/25G-LR-S is a dual-rate 10G and 25G LR SFP28 optical module for single-mode fiber. It supports 1310 nm SMF links up to 10 km.
  • Can SFP-10/25G-LR-S run at both 10G and 25G?

    Yes. SFP-10/25G-LR-S supports 10G or 25G LR operation over 1310 nm single-mode fiber. The Cisco SFP28 host port must support the selected operating rate.
  • How far can SFP-10/25G-LR-S reach?

    SFP-10/25G-LR-S supports up to 10 km over standard G.652 single-mode fiber. The deployed link should still be checked for insertion loss and peer optic compatibility.
  • Is SFP-10/25G-LR-S single-mode or multimode?

    SFP-10/25G-LR-S is a single-mode LR optic. Short 25G multimode links belong with SFP-25G-SR-S rather than the LR-S SMF SKU.
  • What connector does SFP-10/25G-LR-S use?

    SFP-10/25G-LR-S uses dual LC connectors for 10G or 25G LR over single-mode fiber. The far-end optic must run the same speed and LR wavelength.
  • How is SFP-10/25G-LR-S different from SFP-10G-LR-S?

    SFP-10/25G-LR-S is an SFP28 dual-rate 10G or 25G LR optic for 1310 nm SMF. SFP-10G-LR-S is an SFP+ S-Class optic for 10G LR only.
  • Does SFP-10/25G-LR-S support FCoE?

    Yes. SFP-10/25G-LR-S supports FCoE with appropriate host software support. It is also a dual-rate 10G or 25G LR optic for 1310 nm single-mode fiber.
  • When is SFP-10/25G-LR-S the wrong SKU?

    SFP-10/25G-LR-S is the wrong SKU for multimode cabling, non-SFP28 host ports, or reach beyond 10 km. Its role is dual-rate 10G or 25G LR over SMF.

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  • SFP-10-25G-LR-S Datasheet