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What is the difference between Cisco SFP-10G-SR and SFP-10G-SR S?
Knowledge Base + 2024.01.05

The main difference between the Cisco SFP-10G-SR and SFP-10G-SR S is the manufacturer warranty.

What is SFP-10G-SR

SFP-10G-SR is typically used as a part number by Cisco. According to Cisco, it is 10GBASE-SR SFP+ Module supports a link length of 26m on standard Fiber Distributed Data Interface (FDDI)-grade Multimode Fiber (MMF). SFP-10G-SR is a hot-swappable input/output device which allows a 10 Gigabit Ethernet port to link with a fiber optic network. SFP-10G-SR is also used as the replacement model of compatible 10GBase-SR SFP+ Transceiver with the same function and performance supplied by many other 3rd party suppliers and stores.

What is SFP-10G-SR-S

Like as SFP-10G-SR, SFP-10G-SR-S is typically used as the part number of Cisco S-Class 10GBASE-SR SFP+ Module. The main difference between SFP-10G-SR and SFP-10G-SR-S is the different features. According to Cisco, S-class optics is an inexpensive option designed for enterprise and data center 10G and 40G applications. The S class is suitable for the below environment: in non-temperature controlled environments, e.g. rugged/ industrial (RGD), Optics plugged on platforms that require extended operating temperature range (EXT), TAA compliance.

The Cisco SFP-10G-SR has a standard warranty that is included with the purchase of the module. The SFP-10G-SR S, on the other hand, comes with an extended warranty for additional support and coverage.

Aside from the warranty difference, both modules have the same specifications and functionality, including the same 10G data rate and support for short-range fiber optic connections.

Now let us make a comparison on the detailed specification on them. the below table lists the main specification of those 10GBASE-SR SFP+ transceivers.

Transceiver TypeSFP+ TransceiverSFP+ TransceiverSFP+ Transceiver
Wavelength850 nm850 nm850 nm
Reach300 m300 m300 m
Fibre TypeMultimode Fiber (MMF)Multimode Fiber (MMF)Multimode Fiber (MMF)
Connector TypeLC DuplexLC DuplexLC Duplex
Data Rate10 Gbps10 Gbps10 Gbps
Cabling TypeEthernet 10GBASE-SREthernet 10GBASE-SR10GBASE-SR,10GBASE-SW, OTU2/OTU2e
DOM SupportYesYesYes
Operating Temperature0°C to 70°C (Commercial Grade)0°C to 70°C (Commercial Grade)-5°C to 85°C (Extended Grade)
Storage Temperature-40°C to 85°C-40°C to 85°C-40°C to 85°C

Power Consumption0.6 W0.6 W0.6 W
Weight0.025 kg0.025 kg0.025 kg
Other featuresNon-S-ClassS-ClassExtended Temperature and  OTU2/OTU2e
Price (Router-Switch)US$235.00 US$158.00 US$1,575.00 
Price (Monoprice)N/AUS$136.75 N/A
Price (Optcore)US$12.00 US$12.00 US$14.00 

What's the Difference SFP-10G-SR between SFP-10G-LR?

Optical fiber communication technology occupies a pivotal position in information transmission. It greatly improves the data transmission speed and becomes the main communication transmission technology in China. The optical module is a very important part of the optical fiber communication technology. In the parameters of the optical module, we often see such parameters as the SFP-10G-SR and the SFP-10G-LR. If you contact the optical module as long as enough, you will be clearer to understand what it means, but some friends who are new to the industry may not understand the parameters. Let sopto help you comprehend what these parameters mean and what difference and connection they have.

What are the SFP-10G-SR and SFP-10G-LR?

In simple terms, the SFP-10G-SR/LR is a very common type of optical module. Cisco, Huawei and other large manufacturers have this kind of production, mainly used in switches and routers, we can analyze it from the three aspects.

SFP (Small Form-factor Pluggable) refers to a small module that can be hot-pluggable. It can be regarded as an upgraded version of GBIC. It only sizes as the thumb and can greatly increase the port density. The SFP complies with the IEEE802.3, SFF-8472 protocol and can use digital diagnostics through I2C.

10G stands for its maximum transmission rate of 10.3 Gbps. It is suitable for 10 Gigabit Ethernet. 10G optical networks have become popular in telecommunication networks. 10G switches are also being used by more and more people.

SR and LR represent the transmission distance of the optical module. SR, LR, LRM, ER and ZR are more common in the 10G IEEE standard. The transmission distance they represent is from short to long. You can check it by the following table.

10G IEEE standard

Transmission Distance


300m or 400m









Comparison of appearance

Let us first look at the appearance of the SFP-10G-LR-S optical module and the SFP-10G-SR-S optical module. They are packaged in the form of SFP+ and can be plugged into the SFP+ port of the switch and are also hot-pluggable. The overall size is also the same. Because of different manufacturers, there are differences in the label position and interface design of the two optical modules, but the components are the same and there is no difference between them.




 Package type




10 Gbps

10 Gbps








LC duplex

LC duplex

 Laser type

VCSEL 850nm

DFB 1310nm

 Fiber optic type






 Transmitted light power



 Received sensibility

< -11.1dBm

< -14.4dBm

 Commercial temperature

0~ 70°C (32 ~ 158°F)

0~ 70°C (32 ~ 158°F)


Maximum transmission rate 10.3Gbps

850 nm VCESL Laser

Typical transmission distance 300 meters (OM3 multimode fiber)

3.3V single voltage, TTL logic interface

Dual LC interface, hot-pluggable

Maximum transmission rate 10.3Gbps

1310 nm DFB-LD Laser

Typical transmission distance 10 kilometers

3.3V single voltage, TTL logic interface

Dual LC interface, hot-pluggable 

 Application range

Only used for short distance connections

Only used for long distance connections