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Arista SFP-25G-SR-E 25GBASE-SR SFP28 850nm
25 Gbps 25GBASE-SR (E-series, low latency) SFP28 transceiver, 850 nm, up to 50 m OM4 (no FEC), 0 to 70 °C case temperature.
- Manufacturer
- Arista Networks, Inc.
- Mfr part number
- SFP-25G-SR-E
- Series
- 25G SFP28
- Category
- Fiber optic transceiver modules
- Datasheet
- SFP-25G-SR-E datasheet (PDF)
SFP-25G-SR-E specifications
| Attribute | Value |
|---|---|
| Part Number | SFP-25G-SR-E |
| Manufacturer | Arista Networks, Inc. |
| Brand | Arista Networks |
| Standard | 25GBASE-SR (E-series, low latency) |
| Form Factor | SFP28, hot-swappable |
| Data Rate | 25 Gbps |
| Wavelength | 850 nm |
| Media | Multimode (OM3/OM4) |
| Max Distance | 50 m OM4 (no FEC) |
| Connector | Duplex LC |
| Tx Power | −4.5 to 2.4 dBm |
| Rx Power | −5.9 to 2.4 dBm (no FEC) |
| Case Temp | 0 °C to 70 °C |
| Dimensions | 8.55 × 13.7 × 56.5 mm |
| Compliance | IEEE 802.3, SFP28 MSA |
| Reach detail | 30 m OM3 / 50 m OM4 without FEC for lowest latency, or 70 m OM3 / 100 m OM4 with FEC |
All values are from Arista Networks' published Optics Modules and Cables data sheet (Sep 2026). Confirm platform support for your switch with us before ordering.
About the Arista SFP-25G-SR-E
The Arista SFP-25G-SR-E is a hot-swappable SFP28 25GBASE-SR (E-series, low latency) optical transceiver for 25 Gbps Ethernet over multimode (OM3/OM4), with a Duplex LC interface and reach of up to 50 m OM4 (no FEC). Running without FEC removes FEC delay from every hop, which is why it is popular in trading and other latency-critical networks. Typical uses: 25G server access, leaf-spine fabrics and 10G-to-25G migrations.
- 25 Gbps 25GBASE-SR up to 50 m OM4 (no FEC)
- Runs without FEC for lowest latency
- Trading, HFT and low-latency fabrics
- Duplex LC connector · Multimode (OM3/OM4)
- Genuine Arista optic · GST invoice · pan-India dispatch
SFP-25G-SR-E: frequently asked questions
What is the Arista SFP-25G-SR-E?
The Arista SFP-25G-SR-E is a SFP28 25GBASE-SR (E-series, low latency) module from Arista Networks for 25 Gbps links. It plugs into a SFP25 / SFP28 port on an Arista switch and is used for 25G server access, leaf-spine fabrics and 10G-to-25G migrations.
What is the maximum distance of the SFP-25G-SR-E?
Arista specifies the SFP-25G-SR-E for 30 m OM3 / 50 m OM4 without FEC for lowest latency, or 70 m OM3 / 100 m OM4 with FEC.
What are the transmit and receive power levels of the SFP-25G-SR-E?
Per Arista's published optics data sheet, the SFP-25G-SR-E transmits −4.5 to 2.4 dBm and receives −5.9 to 2.4 dBm (no FEC).
Which fiber and connector does the SFP-25G-SR-E need?
The SFP-25G-SR-E uses a Duplex LC connector on multimode (OM3/OM4), at 850 nm. Both ends of the link must use the same optical standard.
Is the SFP-25G-SR-E compatible with my Arista switch?
It works in Arista switches with SFP25 / SFP28 ports that support this optic. Send us your switch model and EOS version and we will check it against Arista's Transceiver and Cable Guide before dispatch, so you only receive a module that works in your port.
SFP-25G-SR-E vs SFP-25G-SR: why choose the E-series?
SFP-25G-SR-E has enhanced optics that let the link run without FEC (30 m OM3 / 50 m OM4), cutting latency. With FEC on it matches SFP-25G-SR at 70/100 m. Pick SR-E when latency matters more than reach.
Is your SFP-25G-SR-E genuine Arista?
Yes. Next Gen Networks supplies original Arista Networks optics, not third-party lookalikes or grey-market stock. Every unit is checked before dispatch, and we share the serial numbers on request so you can verify them in EOS ('show inventory').
What is the SFP-25G-SR-E price in India and how do I order?
The Arista SFP-25G-SR-E price in India depends on quantity, delivery city and current stock. Next Gen Networks supplies it with a GST invoice (input tax credit ready) and pan-India dispatch from New Delhi. Send the part number, quantity and delivery city on WhatsApp +91-7827955775 or email Sales@nextgennetworks.in and we reply with a GST quote.
Documents
NextGen datasheetPDF · specs, FAQ & buying guideManufacturer datasheet
Arista family datasheet
Related Arista parts
SFP-25G-SR25GBASE-SR, 70 m OM3 / 100 m OM4SFP-25G-MR-SR10/25GBASE-MR-SR, 100 m @25G / 400 m @10GSFP-25G-MR-XSR10/25GBASE-MR-XSR, 300 m OM4 @25GSFP-25G-LR25GBASE-LR, 10 km SMFSFP-25G-LR-E25GBASE-LR, 2 km (no FEC) / 10 kmSFP-25G-MR-LR10/25GBASE-MR-LR, 10 km SMFGovernment, PSU and enterprise orders welcome. GST invoice and pan-India delivery.
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