• Silver-colored Arista SFP-25G-SR-E 25G SFP28 transceiver modules with blue handles and metallic connectors for 50m LC use
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Arista

Arista SFP-25G-SR-E | 25G SFP28 Transceiver, E-Series, 850nm MMF, 50m, LC

SFP-25G-SR-E

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Description

This 25GbE SFP28 short-reach transceiver is part of Arista's low-latency E-Series optics range. It suits server-to-switch and top-of-rack links over duplex multimode fibre, and the no-FEC mode makes it a good fit for latency-sensitive environments such as financial trading and HPC.

It operates at 850nm with a duplex LC connector over 50.0um multimode fibre. With FEC disabled it reaches 30m on OM3 or 50m on OM4. Enabling FEC extends reach to 70m on OM3 or 100m on OM4. Transmit power is -4.5 to 2.4 dBm, and receive power is -5.9 to 2.4 dBm without FEC or -10.3 to 2.4 dBm with FEC. Maximum power consumption is 1.5 W, drawn from the host SFP28 port.

It fits Arista SFP28 (25G) ports and is used with OM3 or OM4 duplex multimode fibre. Both ends of the link must use matching FEC settings.

Enquire with XS Network Tech for new or used pricing and availability.

Features

- E-Series (Enhanced) optic designed for low latency
- Can run without FEC for the lowest latency on short links
- Can run with FEC to extend reach to 70m on OM3 and 100m on OM4
- Standard duplex LC multimode connectivity
- Powered from the host SFP28 port
- Operating case temperature range of 0 to 70 C

Warranty

All products sold by XS Network Tech include a 12-month warranty on both new and used items. Our in-house technical team thoroughly tests used hardware prior to sale to ensure enterprise-grade reliability.

All technical data should be verified on the manufacturer data sheets.

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Technical Specifications

FAQs

Technical Specifications

- PHY type: 25GBASE-SR-E (SR-Enhanced)
- Form factor: SFP (SFP28)
- Connector type: LC (duplex)
- Wavelength: 850 nm
- Cable type: MMF
- Core size: 50.0 um
- Modal bandwidth: 2000 MHzkm (OM3) / 4700 MHzkm (OM4)
- Tx power: -4.5 to 2.4 dBm
- Rx power without FEC: -5.9 to 2.4 dBm
- Rx power with FEC: -10.3 to 2.4 dBm
- Max reach without FEC: 30m (OM3) / 50m (OM4)
- Max reach with FEC: 70m (OM3) / 100m (OM4)
- Dimensions (H x W x D): 8.55 x 13.7 x 56.5 mm
- Operating case temperature: 0 to 70 C
- Storage temperature: -40 to 70 C
- Relative humidity: 5 to 95%
- Operating altitude: 0 to 10,000 ft
- Maximum power consumption: 1.5 W

FAQs

Q: What reach does this transceiver support?
A: Without FEC it reaches 30m on OM3 or 50m on OM4. With FEC enabled it reaches 70m on OM3 or 100m on OM4.

Q: Do both ends of the link need the same FEC setting?
A: Yes. Both ends of the link must use matching FEC settings, either both without FEC or both with FEC.

Q: What fibre does it need?
A: It runs over duplex multimode fibre with LC connectors, using OM3 or OM4 cabling at 850nm.

Q: Which ports does it fit?
A: It fits Arista SFP28 (25G) ports. Platform support is listed in Arista's Transceiver and Cable Guide.

Q: Why choose the E-Series over a standard 25G SR optic?
A: The E-Series is designed for low latency and can run without FEC, which suits short links in financial trading and HPC. FEC can be enabled when longer reach is needed.

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