SFP-10G-ER – 10GBASE-ER SFP+ – 1550nm SMF – 40km Reach

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SFP-10G-ER Description

The SFP-10G-ER is a Cisco 10GBASE-ER SFP+ transceiver for 40 km 10G Ethernet links over single-mode fiber between buildings or sites. 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. Links shorter than 20 km need a 5 dB 1550 nm fixed-loss attenuator, and paths longer than 30 km require verified cable loss.

Quick Specs

Parameter

Specification

Product ID

SFP-10G-ER

Product type

10GBASE-ER SFP+ transceiver

Data rate

10 Gigabit Ethernet

Fiber type

Standard single-mode fiber

SMF reference

ITU-T G.652

Wavelength

1550 nm

Operating distance

Up to 40 km

Connector type

Dual LC/PC

Maximum power consumption

1.5W

Operating temperature class

Commercial 0 to 70°C

Attenuator planning

5 dB 1550 nm fixed-loss attenuator for links under 20 km

Application Scenarios

Metro And Campus Fiber Spans

Across a campus or metro fiber route of 20 to 40 km, the module carries a 10G Ethernet link over G.652 single-mode fiber between SFP+ ports on the two end switches or routers.

Long Uplink To A Remote Site

A remote office or edge site 30 to 40 km from the core can reach it over one duplex fiber pair, and the cable loss is verified first because links beyond 30 km are engineered links.

Product Comparison

Parameter

SFP-10G-ER

SFP-10G-ZR

SFP-10G-LR

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

1310 nm

Operating distance

Up to 40 km

Up to about 80 km

10 km

Operating temperature

0 to 70°C

0 to 70°C

0 to 70°C

Maximum power consumption

1.5W

1.5W

1W

Bail latch color

Red

Green

Blue

SFP-10G-ER and SFP-10G-ZR both run 1550 nm over G.652 single-mode fiber, but SFP-10G-ER is documented for up to 40 km at 1.5W while SFP-10G-ZR reaches up to about 80 km, so spans beyond 40 km need SFP-10G-ZR. SFP-10G-LR is the 1310 nm option at 10 km and 1W, and it suits links of 10 km or less without the attenuator that SFP-10G-ER needs under 20 km. The latch color tells the three apart in the rack: red for SFP-10G-ER, green for SFP-10G-ZR and blue for SFP-10G-LR. Sites that need the -40 to 85 degrees C industrial range order SFP-10G-ER-I instead, and Cisco’s S-Class line SFP-10G-ER-S does not support FCoE.

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: For links under 20 km, add a 5 dB 1550 nm fixed-loss attenuator, spare part 15216 ATT LC 5=. Without it the receiver can be overloaded on a short ER span.
  • Spans beyond 30 km: Verify cable loss values for any path over 30 km. Links longer than 30 km are treated as engineered links.

Specifications

Parameter Specification Parameter Specification
Product ID SFP-10G-ER Product type 10GBASE-ER SFP+ transceiver
Cisco ordering description 10GBASE-ER SFP+ Module for SMF Data rate 10 Gigabit Ethernet
Fiber type Standard 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 matrix required for exact host and software support

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    Samantha Tanaka
    Posted on 11/03/2026
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    5.0

    Box contents matched the shipping manifest perfectly. Nothing missing, nothing extra.

    William Long
    Posted on 05/02/2026
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    5.0

    Received a shipping notification within an hour of ordering.

    Ashley Moore
    Posted on 01/01/2026
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    5.0

    Zero post-deployment issues. Our monitoring shows clean performance.

    M. Al-Fayed
    Posted on 05/10/2024
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    5.0

    Excellent packaging. International shipping was surprisingly fast. Very happy with the service.

    System Admin - L2
    Posted on 28/07/2024
    Verified Buyer
    5.0

    High quality, genuine optics. Running stable for months now. Service was excellent.

Questions & Answers

  • What transmit and receive power range does SFP-10G-ER specify on N7K-M348XP-25L?

    On N7K-M348XP-25L and the other supported M-series cards, SFP-10G-ER transmits at 4.0 to -4.7 dBm and receives at -1.0 to -15.8 dBm, per the Nexus hardware installation guide. These levels apply to the 1550 nm single-mode link. Use them with the measured fiber loss when you build the optical power budget.
  • Which M-series line cards list SFP-10G-ER in a Nexus chassis?

    SFP-10G-ER is supported on N7K-M132XP-12, N7K-M132XP-12L, N7K-M224XP-23L and N7K-M348XP-25L, per the Nexus hardware installation guide. It is not listed for N7K-M108X2-12L. Confirm the line card in the chassis before ordering the optic, because a card outside that list will not accept it.
  • Does SFP-10G-ER need a revision footnote on Nexus F-series line cards?

    No. SFP-10G-ER is listed without a revision footnote on N7K-F132XP-15, N7K-F248XP-25, N7K-F248XP-25E and N7K-F348XP-25, per the Nexus hardware installation guide. Any SFP-10G-ER on hand can be installed on those cards, and the same fiber and connector rules for the 40 km class still apply.
  • How many miles is the 40 km reach of SFP-10G-ER?

    The 40 km reach of SFP-10G-ER is 24.9 miles, per the Nexus hardware installation guide, for G.652 single-mode fiber with dual LC/PC connectors at 1550 nm. Use the mileage figure when a carrier fiber record or a site survey is written in miles, and confirm it against the measured loss on the route.

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DataSheet Downloads

  • SFP-10G-ER Datasheet