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Arista 40GB Transceivers QSFP+ - Refurbished, Used, New
Arista 40G QSFP+ transceivers fit the 40G ports on Arista 7050X, 7060X, 7280 and 7500 series switches and are used for leaf-to-spine uplinks, switch-to-switch trunks and 4x 10G breakouts to servers. The lineup splits into parallel optics with an MPO connector (SR4, XSR4, PLR4), which can break out into four 10G links, and duplex optics with an LC connector (UNIV, SRBD, LR4, LRL4, ER4), which run over the same two-strand patch cords you already use for 10G. NetworkTigers sells all eight Arista 40G QSFP+ types refurbished, used and new. Every transceiver is tested before it ships so it links up when it arrives.
Arista 40G QSFP+ modules by reach
| Part number | Reach, fiber and connector | Shop |
|---|---|---|
| QSFP-40G-SR4 | 40GBASE-SR4, 850nm, parallel multimode fiber, MPO-12, up to 100m on OM3 and 150m on OM4; breaks out to 4x 10G-SR | QSFP-40G-SR4 |
| QSFP-40G-XSR4 | Extended-reach SR4, 850nm, parallel multimode fiber, MPO-12, up to 300m on OM3 and 400m on OM4; breaks out to 4x 10G-SR | QSFP-40G-XSR4 |
| QSFP-40G-SRBD | 40G BiDi, two 20G wavelengths each way on one duplex multimode pair, LC, up to 100m on OM3 and 150m on OM4 | QSFP-40G-SRBD |
| QSFP-40G-UNIV | Universal 40G, 1310nm, duplex LC, up to 150m on multimode and 500m on single-mode fiber | QSFP-40G-UNIV |
| QSFP-40G-LRL4 | 40GBASE-LRL4, 1310nm CWDM, duplex single-mode fiber, LC, up to 1km | QSFP-40G-LRL4 |
| QSFP-40G-LR4 | 40GBASE-LR4, 1310nm CWDM, duplex single-mode fiber, LC, up to 10km | QSFP-40G-LR4 |
| QSFP-40G-PLR4 | Parallel LR4, 1310nm, parallel single-mode fiber, MPO-12, up to 10km; breaks out to 4x 10G-LR | QSFP-40G-PLR4 |
| QSFP-40G-ER4 | 40GBASE-ER4, 1310nm CWDM, duplex single-mode fiber, LC, up to 40km | QSFP-40G-ER4 |
| Related Arista optics | Other Arista speeds and the cables that pair with 40G ports | All Arista optics | 10G SFP+ | 100G QSFP28 | Breakout cables | DAC cables |
Which Arista 40G QSFP+ do I need?
Decide whether the link is point-to-point 40G or a breakout. For a breakout to four 10G ports you need a parallel optic (SR4, XSR4 or PLR4) and an MPO-to-4x LC fanout cable; the duplex optics cannot be split. For a straight 40G link over existing duplex multimode patch cords, SRBD or UNIV let you reuse the LC cabling from your 10G days without pulling new MPO trunks, with UNIV also working on single-mode up to 500m. Choose SR4 for MPO trunks up to 150m and XSR4 when the multimode run goes beyond that. On single-mode, LRL4 covers 1km, LR4 10km and ER4 40km over duplex LC, while PLR4 gives 10km over parallel fiber and can also land on four 10G-LR optics at the far end. Match the same optic type at both ends of a link, and check the OM rating and connector polarity of your MPO trunk before ordering parallel optics.
Frequently asked questions
Can a 40G QSFP+ optic go in a 100G QSFP28 port?
Yes on most Arista 7060X, 7280R and 7500R ports, which accept QSFP+ modules and run the port at 40G. The reverse is not true: a QSFP28 optic will not run in a 40G-only QSFP+ port.
What is the difference between LR4 and PLR4?
Both reach 10km over single-mode fiber. LR4 multiplexes four wavelengths onto one duplex LC pair, so it needs only two strands. PLR4 sends one 1310nm lane per fiber over an eight-strand MPO cable, so it needs parallel single-mode trunk but can break out to four separate 10G-LR links.
Does an XSR4 link to a standard SR4 at the other end?
Yes. XSR4 uses the same 850nm parallel signaling as SR4, so a mixed pair links at SR4 distances. You only get the extended 300m or 400m reach when both ends are XSR4.
NetworkTigers has sold enterprise network equipment since 1996. Every transceiver carries the NetworkTigers 365-day warranty. Need a batch for a spine upgrade? Ask us for a quote.
Arista QSFP-40G-UNIV 40GB MMF Universal 1310nm QSFP+ Transceiver
$ 54.99
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Arista QSFP-40G-SR4 40GB BASE-SR4 850nm Short Reach MMF QSFP+ Transceiver
$ 29.99
$ 34.99
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Arista QSFP-40G-PLR4 40GB BASE-LR4 1310nm SMF MTP-12 QSFP+ Transceiver
$ 62.99
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Arista QSFP-40G-LR4 BASE-LR4 40GB 1310nm Long Reach SMF LC QSFP+ Transceiver
$ 119.99
$ 144.99
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NEW Arista QSFP-40G-SR4 40GB BASE-SR4 850nm Short Reach MMF QSFP+ Transceiver
Arista QSFP-40G-LRL4 40GB BASE-LRL4 850nm SMF QSFP+ Transceiver
$ 48.99
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NEW Arista QSFP-40G-PLR4 40GB BASE-LR4 1310nm SMF MTP-12 QSFP+ Transceiver
$ 178.99
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NEW Arista QSFP-40G-XSR4 40GB BASE-XSR4 850nm Short Reach MMF QSFP+ Transceiver
$ 76.99
$ 97.99
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NEW Arista QSFP-40G-UNIV 40 Gigabit Universal MMF QSFP+ Optical Transceiver
NEW Arista QSFP-40G-SRBD 40GB BASE-BIDI 850nm BiDI MMF QSFP+ Transceiver
NEW Arista QSFP-40G-LRL4 40GB BASE-LRL4 850nm SMF QSFP+ Transceiver
$ 89.99
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NEW Arista QSFP-40G-LR4 BASE-LR4 40GB 1310nm Long Reach SMF LC QSFP+ Transceiver
Arista QSFP-40G-XSR4 40GB BASE-XSR4 850nm Short Reach MMF QSFP+ Transceiver
$ 23.99
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Arista QSFP-40G-SRBD 40GB BASE-BIDI 850nm BiDirectional MMF QSFP+ Transceiver
$ 91.99
$ 117.99
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Arista QSFP-40G-ER4 BASE-ER4 40GB SMF QSFP+ Transceiver
$ 2,029.99
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