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Arista SFP-25G-SR 25GBASE-SR SFP28 850nm
25 Gbps 25GBASE-SR SFP28 transceiver, 850 nm, up to 70 m OM3 / 100 m OM4, 0 to 70 °C case temperature.
- Manufacturer
- Arista Networks, Inc.
- Mfr part number
- SFP-25G-SR
- Series
- 25G SFP28
- Category
- Fiber optic transceiver modules
- Datasheet
- SFP-25G-SR datasheet (PDF)
SFP-25G-SR specifications
| Attribute | Value |
|---|---|
| Part Number | SFP-25G-SR |
| Manufacturer | Arista Networks, Inc. |
| Brand | Arista Networks |
| Standard | 25GBASE-SR |
| Form Factor | SFP28, hot-swappable |
| Data Rate | 25 Gbps |
| Wavelength | 850 nm |
| Media | Multimode (OM3/OM4) |
| Max Distance | 70 m OM3 / 100 m OM4 |
| Connector | Duplex LC |
| Tx Power | −8.4 to 2.4 dBm |
| Rx Power | −10.3 to 2.4 dBm |
| Max Power | 1.5 W |
| Case Temp | 0 °C to 70 °C |
| Dimensions | 8.55 × 13.7 × 56.5 mm |
| Reach detail | 70 m on OM3 and 100 m on OM4 duplex multimode fiber |
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
The Arista SFP-25G-SR is a hot-swappable SFP28 25GBASE-SR optical transceiver for 25 Gbps Ethernet over multimode (OM3/OM4), with a Duplex LC interface and reach of up to 70 m OM3 / 100 m OM4. Typical uses: 25G server access, leaf-spine fabrics and 10G-to-25G migrations.
- 25 Gbps 25GBASE-SR up to 70 m OM3 / 100 m OM4
- 25G server and leaf connectivity
- Breaks out from 100G-SR4 parallel optics
- Duplex LC connector · Multimode (OM3/OM4)
- Genuine Arista optic · GST invoice · pan-India dispatch
SFP-25G-SR: frequently asked questions
What is the Arista SFP-25G-SR?
The Arista SFP-25G-SR is a SFP28 25GBASE-SR 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?
Arista specifies the SFP-25G-SR for 70 m on OM3 and 100 m on OM4 duplex multimode fiber.
What are the transmit and receive power levels of the SFP-25G-SR?
Per Arista's published optics data sheet, the SFP-25G-SR transmits −8.4 to 2.4 dBm and receives −10.3 to 2.4 dBm.
Which fiber and connector does the SFP-25G-SR need?
The SFP-25G-SR 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 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 vs SFP-25G-MR-SR vs SFP-25G-MR-XSR: which one?
SFP-25G-SR is fixed 25G (70 m OM3 / 100 m OM4). SFP-25G-MR-SR is dual-rate 25G/10G with the same 25G reach and 300/400 m at 10G, so it can talk to existing 10G-SR. SFP-25G-MR-XSR extends 25G reach to 200 m OM3 / 300 m OM4.
Is your SFP-25G-SR 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 price in India and how do I order?
The Arista SFP-25G-SR 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.
How much power does the SFP-25G-SR draw?
Arista lists maximum power of 1.5 W for the SFP-25G-SR. Check your switch's per-port power budget for dense deployments.
Documents
NextGen datasheetPDF · specs, FAQ & buying guideManufacturer datasheet
Arista family datasheet
Related Arista parts
SFP-25G-MR-SR10/25GBASE-MR-SR, 100 m @25G / 400 m @10GSFP-25G-MR-XSR10/25GBASE-MR-XSR, 300 m OM4 @25GSFP-25G-SR-E25GBASE-SR, 50 m OM4 (no FEC)SFP-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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