Cisco sfp 10g sr vs sfp 10g sr s : What's the difference?

SFP-10G-SR-S vs SFP-10G-SR: Difference

Technically, there is no any major difference between the "SFP-10G-SR-S" and "SFP-10G-SR". But the S-class one is more recommendable as an inexpensive option. ( The S-class one does not support FCoE.)
As for the non-S class one, it is suitable for environments as below:
• OTN or WAN-PHY support
• Optics deployed in non-temperature controlled environments, e.g. rugged/ industrial (RGD)
• Optics plugged on platforms that require extended operating temperature range (EXT)
• TAA compliance
 
According to Cisco, S-class optics are intended for enterprise and data center 10G and 40G applications This new set of optics does not display several unnecessary features for these applications, bringing about a more attractive price. That explains why SFP-10G-SR-S price is lower than SFP-10G-SR price.
Except the price, there are some other differences. SFP-10G-SR-S optics aren’t TAA certified. However, the non-S-class optics such as SFP-10G-SR are all compliant to TAA. SFP-10G-SR-S optics only have COM (Commercial temperature range: 0~70℃). However, the temperature range of SFP-10G-SR can be EXT (Extended temperature range: -5~85℃), IND (Industrial temperature range: -40~85℃) and Storage temperature range (-40~85℃). In terms of protocols, SFP-10G-SR-S optics use Ethernet only, they cannot use OTN (Optical Transport Network) or WAN-PHY (Wide Area Network Physics). Furthermore, SFP-10G-SR-S optics just have 10G and 40G applications so far which is specified for 10G and 40G enterprise and data center. Thus, if you don’t need any special features like extra tolerance for temperature, S-Class optics can save you a considerable amount of money.
 

SFP-10G-SR-S vs SFP-10G-SR: Similarity

Seemingly and technically, they don’t have much difference. SFP-10G-SR-S shares the same product specification with SFP-10G-SR. SFP-10G-SR is compliant with 10GBASE-SR standard. The Cisco 10GBASE-SR module supports a link length of 26m on standard Fiber Distributed Data Interface (FDDI)-grade multimode fiber, up to 300m link lengths over OM3 and 400m link lengths over OM4 cables.
Cisco SFP-10G-SR transceiver is hot-swappable input/output device which allows a 10 Gigabit Ethernet port to link with a fiber optic network. Because it is hot-swappable and MSA compliant, the Cisco SFP-10G-SR transceiver can be plugged directly into any Cisco SFP+ based transceiver port, without the need to power down the host network system. This capability makes moves, add-ons and exchanges quick and painless.
 

SFP-10G-SR Price Comparison

Since equipment SFP-10G-SR vendors all rely on MSAs when designing their transceivers, every supplier can produce the transceiver modules with the same functions but with different prices. Unless you have a 100% requirement to buy Cisco, there are a lot of 3rd party compatible vendors out there that you can save a lot of money by using. Here is a price list from different vendors for you to choose from.

Vendor	Model	Brand	Price
CDW	SFP-10G-SR	Cisco	$693.99
Router-Switch	SFP-10G-SR	Cisco	$262.00
Monoprice	SFP-10G-SR	Ironlink	$136.75
10Gtek	SFP-10G-SR	10Gtek	$41.05
FS.COM	SFP-10G-SR	FS.COM	$16.00

 
 

SFP-10G-SR-S vs SFP-10G-SR, Which Will You Choose?

Although SFP-10G-SR-S vs SFP-10G-SR, they share identical specification, there still are some minor difference. In most cases, SFP-10G-SR-S optics are recommended for 10G and 40G applications due to its low cost. both SFP-10G-SR price and SFP-10G-SR-S price is relatively lower according to the above chart, and they also enjoy good quality. If you need any third-party optical modules or fiber optic cables, give FS.COM a shot.
 
Cisco S-Class Module VS Cisco Non-S-Class Module
Cisco only published four 10G S-class SFP+ modules and two 40G S-class QSFP+ modules. The following table listed Cisco S-class modules. Cisco S-class modules seem to have no differences from the non-S-class modules. However, if you read the specification of these modules and the suggestions from Cisco, you will find the differences.
 

Data Rate	S-Class Module	Non-S-Class Module	Media
10G	SFP-10G-SR-S	SFP-10G-SR	MMF (duplex)
10G	SFP-10G-LR-S	SFP-10G-LR	SMF (duplex)
10G	SFP-10G-ER-S	SFP-10G-ER	SMF (duplex)
10G	SFP-10G-ZR-S	SFP-10G-ZR	SMF (duplex)
40G	QSFP-40G-SR4-S	QSFP-40G-SR4	MMF (ribbon)
40G	QSFP-40G-LR4-S	QSFP-40G-LR4	SMF (duplex)

 
Protocol
The standard non-S-class Cisco modules like SFP-10G-SR and SFP-10G-LR can support three protocols including Ethernet, OTN (Optical Transport Network) and WAN-PHY (Wide Area Network Physics). However, the S-class modules can only support Ethernet protocol.
 
Temperature Range
Compared with Cisco C-class modules which can be operating with three different temperature ranges, the Cisco S-class modules can only support the commercial temperature ranges which is 0 to 70°C (32 to 158°F).
· Commercial temperature range (COM): 0 to 70°C (32 to 158°F)
· Extended temperature range (EXT): -5 to 85°C (23 to 185°F)
· Industrial temperature range (IND): -40 to 85°C (-40 to 185°F)
Transmission Distance
Cisco has introduced that the S-class modules are suggested to be used in enterprise network. In addition, the operating temperature range is smaller, thus, S-class module is recommended for shorter transmission distance applications compared with other standard modules.

Features	SFP-10G-SR	SFP-10G-SR-S
Apperance	Same	Same
Transceiver Type	SFP+ Transceiver	SFP+ Transceiver
Wavelength	850 nm	850 nm
Reach	300 m	300 m
Fibre Type	Multimode Fiber (MMF)	Multimode Fiber (MMF)
Connector Type	LC Duplex	LC Duplex
Data Rate	10 Gbps	10 Gbps
Cabling Type	Ethernet 10GBASE-SR	Ethernet 10GBASE-SR
DOM Support	Yes	Yes
Operating Temperature	0°C to 70°C (Commercial Grade)	0°C to 70°C (Commercial Grade)
Storage Temperature	-40°C to 85°C	-40°C to 85°C
Compatibility
Power Consumption	0.6 W	0.6 W
Weight	0.025 kg	0.025 kg
Other features	Non-S-Class	S-Class
Price (Router-Switch)	US$235.00	US$158.00
Price (Monoprice)	N/A	US$136.75
Price (Optcore)	US$12.00	US$12.00

 
 

What are cisco sfp 10g sr and sfp 10g sr s respectively?

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.
 

Conclusion

Cisco 10G S-Class modules share identical specification with non-S-Class modules, but there still are some minor differences. S-Class optics only support Ethernet protocol, lower temperature tolerance and shorter transmission distance. But the most attractive factor is its lower price, and the compatibility is no problem. In a nutshell, Cisco 10G S-Class modules serve as a low-cost solution, but nowadays third-party 10G transceivers become more cost-effective choices with the high maturity of 10G transceiver technologies. These third-party Cisco compatible 10G non-S-Class modules can be much cheaper but also provide the same high performance, which should be ideal for your applications.
If you are a loyal Cisco user, these 10G S-Class transceivers are ideal choices for you in the most common reaches needed in enterprise and data center applications.