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Arista 400GB Transceivers - QSFP-DD / OSFP - Refurbished, Used, New
Arista 400G transceivers are the QSFP-DD and OSFP optics that light the 400G ports on Arista 7060X4, 7280R3 and 7800R3 switches for spine, leaf and data center interconnect links. Each module carries 400G as four 100G lanes (DR4, XDR4, FR4) or eight 50G lanes (SR8) and is chosen by the port type on your switch, the fiber in the ground and the distance between the two ends. The same collection includes the OSFP-800G-2XDR4, an 800G module built as two 400G halves. NetworkTigers sells Arista QDD-400G and OSFP-400G modules refurbished, used and new. Every transceiver is tested before it ships so it links up at full rate when it arrives.
Arista 400G modules by form factor and reach
| Part number | Reach, fiber and connector | Shop |
|---|---|---|
| QDD-400G-SR8 | QSFP-DD, 400GBASE-SR8, 850nm, parallel multimode fiber, up to 100m on OM4, eight-lane MPO | QDD-400G-SR8 |
| QDD-400G-DR4 | QSFP-DD, 400GBASE-DR4, 1310nm, parallel single-mode fiber, up to 500m, MPO-12 | QDD-400G-DR4 |
| QDD-400G-XDR4 | QSFP-DD, 400GBASE-XDR4, 1310nm, parallel single-mode fiber, up to 2km, MPO-12 | QDD-400G-XDR4 |
| QDD-400G-FR4 | QSFP-DD, 400GBASE-FR4, four CWDM wavelengths on duplex single-mode fiber, up to 2km, duplex LC | QDD-400G-FR4 |
| OSFP-400G-SR8 | OSFP, 400GBASE-SR8, 850nm, parallel multimode fiber, up to 100m on OM4, eight-lane MPO | OSFP-400G-SR8 |
| OSFP-400G-DR4 | OSFP, 400GBASE-DR4, 1310nm, parallel single-mode fiber, up to 500m, MPO-12 | OSFP-400G-DR4 |
| OSFP-400G-XDR4 | OSFP, 400GBASE-XDR4, 1310nm, parallel single-mode fiber, up to 2km, MPO-12 | OSFP-400G-XDR4 |
| OSFP-400G-FR4 | OSFP, 400GBASE-FR4, four CWDM wavelengths on duplex single-mode fiber, up to 2km, duplex LC | OSFP-400G-FR4 |
| OSFP-400G-2FR4 | OSFP, 400GBASE-2FR4, two 200G FR4 channels on single-mode fiber, up to 2km, dual CS connectors | OSFP-400G-2FR4 |
| OSFP-800G-2XDR4 | OSFP, 800G as 2x 400G XDR4, eight 100G FR lanes on parallel single-mode fiber, up to 2km, dual MPO-12 | OSFP-800G-2XDR4 |
| Related Arista optics | Lower speeds, breakouts and active cables for the same switches | All Arista optics | 100G QSFP28 | Breakout cables | AOC cables |
Which Arista 400G transceiver do I need?
Check the port first. QSFP-DD and OSFP modules do not interchange: a QSFP-DD cage is the same width as QSFP28 and accepts older QSFP28 and QSFP+ optics, while an OSFP cage is wider, carries a larger heatsink and takes only OSFP modules. Arista 7280R3 and 7060X4 variants ship with one or the other, so match the prefix (QDD or OSFP) to the switch. Then choose by fiber and distance. SR8 runs 100m over OM4 multimode and suits in-row links. DR4 covers 500m and XDR4 2km over parallel single-mode with an MPO connector, and both can break out to four 100G DR or FR links at the far end. FR4 carries 2km over ordinary duplex single-mode fiber with LC connectors, which is the easiest fit when your structured cabling is already duplex. 2FR4 and 800G-2XDR4 are dual-port modules that present two independent links from one cage.
Frequently asked questions
Can I run a 400G DR4 optic to four 100G switches?
Yes. A DR4 or XDR4 module on an MPO-12 breakout cable connects to four 100G-DR or 100G-FR optics on the far side when the switch port is configured for 4x 100G. SR8 breaks out to 2x 200G or 8x 50G on supported switches. FR4 does not break out because its four lanes share one duplex fiber.
Do these modules run hot in a QSFP-DD port?
400G modules draw more power than QSFP28 optics, and DR4 and FR4 variants typically draw more than SR8. Arista switches manage this by port and front-to-back airflow, so keep the fan trays and power supplies the chassis was designed with, and keep dust plugs in empty cages so airflow across a loaded row stays as intended.
Will an Arista 400G optic work in a non-Arista switch?
The modules follow the QSFP-DD and OSFP MSAs, so they often link in other vendors' ports, but some platforms block or warn on non-native optics. NetworkTigers tests each module in an Arista switch; tell us the target platform if you need it confirmed elsewhere.
NetworkTigers has sold enterprise network equipment since 1996. Every transceiver carries the NetworkTigers 365-day warranty. Building a spine or a DCI link? Ask us for a quote.
NEW Arista QDD-400G-DR4 400GBASE-DR4 500m parallel SMF QSFP-DD Transceiver
$ 619.99
Call if you need more
Arista OSFP-800G-2XDR4 8x 100GBASE-FR 2km Over Parallel SMF OSFP Transceiver
$ 2,203.99
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Arista OSFP-400G-XDR4 400GBASE-XDR4 up to 2km over parallel SMF OSFP Transceiver
NEW Arista QDD-400G-XDR4 400GBASE-XDR4 2km over parallel SMF QSFP-DD Transceiver
NEW Arista QDD-400G-FR4 400GB BASE-FR4 1310nm SMF 2km QSFP-DD Transceiver
$ 437.99
$ 574.99
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NEW Arista OSFP-400G-FR4 400GB BASE-FR4 1310nm 2km SMF LC DOM OSFP Transceiver
$ 1,469.99
$ 1,821.99
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Arista QDD-400G-XDR4 400GBASE-XDR4 2km over parallel SMF QSFP-DD Transceiver
$ 133.99
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Arista QDD-400G-SR8 400GB BASE-SR8 100m Parallel OM4 MMF QSFP-DD Transceiver
Arista QDD-400G-FR4 400GB BASE-FR4 1310nm SMF 2km QSFP-DD Transceiver
$ 429.99
$ 562.99
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Arista QDD-400G-DR4 400GBASE-DR4 500m parallel SMF QSFP-DD Transceiver
$ 606.99
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Arista OSFP-400G-SR8 400GBASE-SR8 100m over parallel OM4 MMF OSFP Transceiver
$ 822.99
$ 857.99
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Arista OSFP-400G-FR4 400GB BASE-FR4 1310nm 2km SMF LC DOM OSFP Transceiver
$ 705.99
$ 939.99
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Arista OSFP-400G-DR4 400GB BASE-DR4 500m Over Parallel SMF OSFP Transceiver
