SFP-10G-ER-S – 10GBASE-ER SFP+ – S-Class – 40km SMF

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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

Ethernet-Only Long-Reach Uplinks

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.

Building-To-Building Fiber Spans

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

SFP-10G-ER

SFP-10G-ER-I

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

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    Nicholas Zhang
    Posted on 20/12/2025
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    4.0

    Delivery to our campus was right on schedule. Shipping took a couple extra days, but product itself is perfect.

    Network Eng. Team
    Posted on 25/09/2024
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    5.0

    We had a dead module from another vendor, replaced it with yours and it worked instantly. Thanks for the quick ship.

    Broadband Services
    Posted on 12/06/2024
    Verified Buyer
    5.0

    Needed these for a long-haul link. Signal levels are perfect. Delivery was fast.

Questions & Answers

  • What is the minimum cabling distance for SFP-10G-ER-S?

    SFP-10G-ER-S needs at least 2 m of cabling between the two ends. Links longer than 30 km are treated as engineered links, so measure fiber loss and dispersion for those runs. Short spans below 20 km take the 15216 ATT LC 5= attenuator.
  • What transmit power range does SFP-10G-ER-S specify?

    SFP-10G-ER-S transmits +4.0 to -4.7 dBm. A span with too little loss can push the received level above the receiver limit, which the fixed-loss attenuator prevents.
  • What are the size and weight of SFP-10G-ER-S?

    SFP-10G-ER-S measures 8.5 x 13.4 x 56.5 mm and weighs 75 grams or less. It has a red bail latch and fits a standard SFP+ cage without any clearance allowance.
  • What wavelength range does SFP-10G-ER-S transmit and receive?

    SFP-10G-ER-S transmits and receives anywhere from 1530 to 1565 nm around its nominal 1550 nm wavelength. A mux or filter in the single-mode path must pass that whole band.

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DataSheet Downloads

  • SFP-10G-ER-S Datasheet