SFP-10G-ER-S – 10GBASE-ER SFP+ – S-Class – 40km SMF
Why Layer23-Switch
Stocked, Shipped and Supported by One Team
Ships in 1 Business Day
In-stock orders leave our Hong Kong or U.S. warehouse within 1 business day after payment, with tracking by email.
LSCare Warranty
3years on enterprise equipment
Free CCIE Support
Certified engineers help before and after you buy. Reply within 1 business day by email or live chat.
Verify Before You Pay
100%factory-sealed
Get label and serial photos before shipment, and check every serial number with Cisco.
SFP-10G-ER-S Description
The SFP-10G-ER-S is a Cisco 10GBASE-ER S-Class SFP+ transceiver for 40 km 10G Ethernet links over single-mode fiber. The module runs at 1550 nm on G.652 fiber with dual LC connectors, draws up to 1.5W and operates from 0 to 70°C. The S-Class module does not support FCoE, and links shorter than 20 km need a 5 dB 1550 nm fixed-loss attenuator.
Quick Specs
|
Parameter |
Specification |
|---|---|
|
Product ID |
SFP-10G-ER-S |
|
Product type |
10GBASE-ER S-Class SFP+ transceiver |
|
Module class |
S-Class |
|
Data rate |
10 Gigabit Ethernet |
|
Fiber type |
Single-mode fiber |
|
SMF reference |
ITU-T G.652 |
|
Wavelength |
1550 nm |
|
Operating distance |
Up to 40 km |
|
Connector type |
Dual LC/PC |
|
FCoE support |
Not supported |
|
Maximum power consumption |
1.5W |
|
Operating temperature class |
Commercial 0 to 70°C |
Application Scenarios
On a 40 km single-mode route that carries only Ethernet traffic, the module links two SFP+ host ports at 10G, since the S-Class module does not support FCoE.
Between distant campus buildings or sites on G.652 fiber, the module covers spans that exceed the 10 km LR class, reaching up to 40 km at 1550 nm.
Product Comparison
|
Parameter |
SFP-10G-ER-S | ||
|---|---|---|---|
|
Protocol support |
10GBASE-ER |
10GBASE-ER |
10GBASE-ER, 10GBASE-EW, OTU2/2e |
|
Fiber type |
Standard single-mode fiber (G.652) |
Standard single-mode fiber (G.652) |
Standard single-mode fiber (G.652) |
|
Wavelength |
1550 nm |
1550 nm |
1550 nm |
|
Operating distance |
Up to 40 km |
Up to 40 km |
Up to 40 km |
|
Operating temperature |
0 to 70°C |
0 to 70°C |
-40 to 85°C |
|
Maximum power consumption |
1.5W |
1.5W |
1.5W |
|
FCoE support |
Not supported |
Not published |
Not published |
SFP-10G-ER-S and SFP-10G-ER share the 40 km reach, 1550 nm wavelength, G.652 single-mode fiber, 1.5W maximum power and commercial 0 to 70 degrees C range, so the split is module class: SFP-10G-ER-S is the S-Class order and Cisco documents no FCoE support for it. Links that carry FCoE need a non-S-Class module such as SFP-10G-ER, which is the plain 10GBASE-ER listing. Sites that need the -40 to 85 degrees C industrial range, or the 10GBASE-EW and OTU2/2e scope, order SFP-10G-ER-I, the multirate industrial ER module with the same 40 km reach.
Ordering Checklist
- Fiber type: Use standard G.652 single-mode fiber carrying 1550 nm. The 40 km ER class is specified only for 1550 nm single-mode fiber.
- Short-link attenuator: Add a 5 dB 1550 nm fixed-loss attenuator, spare part 15216 ATT LC 5=, for links under 20 km. Without it the receiver can be overloaded on a short ER span.
Specifications
| Parameter | Specification | Parameter | Specification |
|---|---|---|---|
| Product ID | SFP-10G-ER-S | Product type | 10GBASE-ER S-Class SFP+ transceiver |
| Cisco ordering description | 10GBASE-ER SFP+ Module for SMF S-Class | Module class | S-Class |
| Data rate | 10 Gigabit Ethernet | FCoE support | Not supported |
| Fiber type | Single-mode fiber | SMF reference | ITU-T G.652 |
| Wavelength | 1550 nm | Transmit wavelength range | 1530 to 1565 nm |
| Receive wavelength range | 1530 to 1565 nm | Operating distance | Up to 40 km |
| Engineered-link note | Links longer than 30 km are engineered links | Transmit power range | +4.0 to -4.7 dBm |
| Receive power range | -1.0 to -15.8 dBm | Connector type | Dual LC/PC |
| Patch-cord rule | PC or UPC connectors supported | Bail latch color | Red |
| Maximum power consumption | 1.5W | Operating temperature class | Commercial |
| Operating temperature | 0 to 70°C | Storage temperature | -40 to 85°C |
| Minimum cabling distance | 2 m | Short-link attenuation | 5 dB 1550 nm fixed-loss attenuator for links under 20 km |
| Attenuator spare part | 15216 ATT LC 5= | SFP+ connector dimensions | 8.5 x 13.4 x 56.5 mm |
| SFP+ connector weight | 75 grams or less | Platform support boundary | Cisco compatibility documentation required for exact host and software support |
Get More Information
Need pricing, stock, or shipping details for the SFP-10G-ER-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 [email protected] for a fast quotation.
Quality Certifications
Customer Reviews
Questions & Answers
-
What is the minimum cabling distance for SFP-10G-ER-S?
-
What transmit power range does SFP-10G-ER-S specify?
-
What are the size and weight of SFP-10G-ER-S?
-
What wavelength range does SFP-10G-ER-S transmit and receive?
Warranty
Layer23-Switch.com offers genuine, high-quality ICT products at competitive wholesale prices—ensuring exceptional value without compromising quality.
All items are brand new, original, and factory-sealed.
Upon request, each unit can be fully tested and verified by a Cisco CCIE-certified engineer to ensure perfect working condition before shipment.
Our Cisco CCIE-certified experts provide free professional support via phone, email, online chat, or remote login—helping you deploy and troubleshoot with confidence.
If you are not satisfied with your purchase, you may request an exchange or full refund. Our customer service team will guide you through the return process quickly and smoothly. Visit Return Policy page for more information.
We support multiple secure payment and logistics options, backed by industry-leading verification:












Visit How to Pay page for more information
Extended, Worry-Free Warranty Coverage Factory New Sealed Enterprise Hardware:
· 3 Years Factory New Sealed
Visit Warranty Policy page for more information
Verify, plan, and comparewith confidence
Use practical tools to check device details, review lifecyclemilestones, and compare hardware before you buy.
Standard Services
Personalized Service, Superior Product Maintenance for Ultimate Satisfaction.
- Projects and Technical Support
- Easy Purchasing Supply
- Product Lifecycle Protection
- Exclusive F3 Team Support
Customized Support for Your Needs with CCIE, HCIE, HPE ASE, etc.

I was overprepared for issues. None came up. Just a clean transaction.
Layer23 understands the value of customer trust. It shows in everything they do.
Delivery to our campus was right on schedule. Shipping took a couple extra days, but product itself is perfect.
We had a dead module from another vendor, replaced it with yours and it worked instantly. Thanks for the quick ship.
Needed these for a long-haul link. Signal levels are perfect. Delivery was fast.