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Arista OSFP-400G-2FR4 400GBASE-2FR4 OSFP 1271-1331nm 2 km SMF
400 Gbps 400GBASE-2FR4 (2 × 200G-FR4) OSFP transceiver, 1271–1331 nm (4 lambda CWDM), up to 2 km SMF, 0 to 70 °C case temperature.
- Manufacturer
- Arista Networks, Inc.
- Mfr part number
- OSFP-400G-2FR4
- Series
- 400G OSFP
- Category
- Fiber optic transceiver modules
- Datasheet
- OSFP-400G-2FR4 datasheet (PDF)
OSFP-400G-2FR4 specifications
| Attribute | Value |
|---|---|
| Part Number | OSFP-400G-2FR4 |
| Manufacturer | Arista Networks, Inc. |
| Brand | Arista Networks |
| Standard | 400GBASE-2FR4 (2 × 200G-FR4) |
| Form Factor | OSFP, hot-swappable |
| Data Rate | 400 Gbps |
| Wavelength | 1271–1331 nm (4 lambda CWDM) |
| Media | 2 pairs duplex single-mode |
| Max Distance | 2 km SMF |
| Connector | 2 × CS |
| Tx Power | −4.2 to 4.7 dBm/lane |
| Rx Power | −8.2 to 4.7 dBm/lane |
| Breakout | 2 × 200G-FR4 |
| Max Power | 12 W |
| Case Temp | 0 °C to 70 °C |
| Dimensions | 13.0 × 22.6 × 100.4 mm |
| Compliance | IEEE 802.3, OSFP MSA |
| Reach detail | 2 km over two pairs of duplex single-mode fiber (interoperates with 2 × 200GBASE-FR4) |
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 OSFP-400G-2FR4
The Arista OSFP-400G-2FR4 is a hot-swappable OSFP 400GBASE-2FR4 (2 × 200G-FR4) optical transceiver for 400 Gbps Ethernet over 2 pairs duplex single-mode, with a 2 × CS interface and reach of up to 2 km SMF. It also supports breakout to 2 × 200G-FR4. Typical uses: 400G spine and super-spine fabrics, AI/ML clusters, 4 × 100G breakout and data-centre interconnect.
- 400 Gbps 400GBASE-2FR4 up to 2 km SMF
- Two 200G-FR4 links in one port
- Interoperates with QSFP-200G-FR4
- 2 × CS connector · 2 pairs duplex single-mode
- Genuine Arista optic · GST invoice · pan-India dispatch
OSFP-400G-2FR4: frequently asked questions
What is the Arista OSFP-400G-2FR4?
The Arista OSFP-400G-2FR4 is a OSFP 400GBASE-2FR4 (2 × 200G-FR4) module from Arista Networks for 400 Gbps links. It plugs into a OSFP port on an Arista switch and is used for 400G spine and super-spine fabrics, AI/ML clusters, 4 × 100G breakout and data-centre interconnect.
What is the maximum distance of the OSFP-400G-2FR4?
Arista specifies the OSFP-400G-2FR4 for 2 km over two pairs of duplex single-mode fiber (interoperates with 2 × 200GBASE-FR4).
What are the transmit and receive power levels of the OSFP-400G-2FR4?
Per Arista's published optics data sheet, the OSFP-400G-2FR4 transmits −4.2 to 4.7 dBm/lane and receives −8.2 to 4.7 dBm/lane.
Which fiber and connector does the OSFP-400G-2FR4 need?
The OSFP-400G-2FR4 uses a 2 × CS connector on 2 pairs duplex single-mode, at 1271–1331 nm (4 lambda CWDM). Both ends of the link must use the same optical standard.
Is the OSFP-400G-2FR4 compatible with my Arista switch?
It works in Arista switches with OSFP 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.
Does OSFP-400G-2FR4 work with QSFP-200G-FR4?
Yes. OSFP-400G-2FR4 is two 200GBASE-FR4 optics in one OSFP module, and Arista states optical interoperability with 2 × 200GBASE-FR4 up to 2 km.
Does the OSFP-400G-2FR4 support breakout?
Yes. Arista lists breakout to 2 × 200G-FR4. Use the matching optics at the far end and a suitable breakout cable or patch panel.
Is your OSFP-400G-2FR4 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 OSFP-400G-2FR4 price in India and how do I order?
The Arista OSFP-400G-2FR4 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 OSFP-400G-2FR4 draw?
Arista lists maximum power of 12 W for the OSFP-400G-2FR4. 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
OSFP-400G-VSR4400GBASE-VSR4, 30 m OM3 / 50 m OM4OSFP-400G-SR8400GBASE-SR8, 70 m OM3 / 100 m OM4OSFP-400G-SR8-C400GBASE-SR8 + 8 × 50G / 25G-SR, 70 m OM3 / 100 m OM4OSFP-400G-SRBD400GBASE-BIDI, 70 m OM3 / 100 m OM4OSFP-400G-DR4400GBASE-DR4, 500 m SMFOSFP-400G-XDR4400GBASE-XDR4, 2 km SMFGovernment, PSU and enterprise orders welcome. GST invoice and pan-India delivery.
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