Transceiver • SFP28 25G • QSFP+ 40G • QSFP28 100G
QSFP28 100G, QSFP+ 40G & SFP28 25G modules — Compatibility guaranteed
High-density transceivers for Data Centre, HPC and cloud. Every module is custom coded for your equipment (Cisco, Arista, Mellanox, HPE, Juniper…) and factory tested before shipping. Next-day delivery from our France stock.
✓ Compatibility guaranteed or refunded
✓ Factory coded & tested
✓ France stock, next-day shipping
✓ Technical support included
Cisco compatible
Arista / Mellanox
HPE / Juniper
Lifetime warranty
25G / 40G / 100G optical modules — compatible with Nvidia, Mellanox, Arista, Cisco, HPE, Juniper, Marvell.
How to choose your transceiver module?
Enter your parameters to automatically find the module compatible with your equipment.
100% Compatible
Every module is coded specifically for your brand. Compatibility guaranteed or refunded.
Factory tested
Each transceiver is tested individually before shipping: optical power, sensitivity, temperature.
Technical support
Our team helps you choose the right module. Contact us if your configuration is not listed.
25G SFP28 — Servers and high-density NICs
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Sale!
Elfcam® – 25G SFP28 SR Transceiver Module SFP28 25GBASE-SR 850nm 100m DOM LC Duplex MMF, compatible with Nvidia/Mellanox/Arista/Cisco/HPE/Juniper/Marvell, Pack of 1 (Ref: 16612)
5 comments Original price was: 966,99 Kč.893,99 KčCurrent price is: 893,99 Kč. + This product has multiple variants. The options may be chosen on the product page -
Sale!
Elfcam® – 25G SFP28 LR Transceiver Module SFP28 25GBASE-LR 1310nm 10km DOM LC Duplex SMF, compatible with Nvidia/Mellanox/Arista/Cisco/HPE/Juniper/Marvell, Pack of 1 (Ref: 20961)
2 comments Original price was: 1 450,99 Kč.1 208,99 KčCurrent price is: 1 208,99 Kč. + This product has multiple variants. The options may be chosen on the product page -
Sale!
Elfcam® – 25G SFP28 LR Transceiver Module SFP28 25GBASE-LR 1310nm 80km DOM LC Duplex SMF, compatible with Nvidia/Mellanox/Arista/Cisco/HPE/Juniper/Marvell, Pack of 1 (Ref: 20956)
4 comments Original price was: 16 932,99 Kč.10 642,99 KčCurrent price is: 10 642,99 Kč. + This product has multiple variants. The options may be chosen on the product page
40G QSFP+ — Aggregation and spine-leaf
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Sale!
40G QSFP+ SR4 Transceiver Module QSFP+ 40GBASE-SR4 850nm 100m MPO, compatible with Nvidia/Mellanox/Arista/Cisco/HPE/Juniper/Marvell (Ref: 16632)
4 comments Original price was: 2 417,99 Kč.2 175,99 KčCurrent price is: 2 175,99 Kč. + This product has multiple variants. The options may be chosen on the product page -
Sale!
40G QSFP+ to 4 x SFP+ Direct Attach Copper Cable (DAC), Twinax Cable, Passive
3 comments 1M – 3M Original price was: 1 426,99 Kč.1 353,99 KčCurrent price is: 1 353,99 Kč. + This product has multiple variants. The options may be chosen on the product page -
Sale!
40G QSFP+ to QSFP+ Direct Attach Copper Cable (DAC), Twinax Cable, Passive
2 comments 1M – 3M Original price was: 966,99 Kč.893,99 KčCurrent price is: 893,99 Kč. + This product has multiple variants. The options may be chosen on the product page -
40G QSFP+ ZR4 Transceiver Module QSFP+ 40GBASE-ZR4 1310nm 80km
2 comments + -
Sale!
40G QSFP+ ER4 Transceiver Module QSFP+ 40GBASE-ER4 10CWDM 40km
3 comments Original price was: 48 380,99 Kč.45 961,99 KčCurrent price is: 45 961,99 Kč. + -
Sale!
40G QSFP+ LR4 Transceiver Module QSFP+ 40GBASE-LR4 4x10CWDM 10km OS2 LC/UPC, compatible with Nvidia/Mellanox/Arista/Cisco/HPE/Juniper/Marvell, Pack of 1 (Ref: 16633)
3 comments Original price was: 1 692,99 Kč.1 410,99 KčCurrent price is: 1 410,99 Kč. + This product has multiple variants. The options may be chosen on the product page
100G QSFP28 — Data Centre & high-density interconnect
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100G QSFP28 SR4 Transceiver Module QSFP28 100GBASE-SR4 850nm 100m DOM MTP/MPO, Compatible with Nvidia/Mellanox/Arista/Cisco/HPE/Juniper/Marvell, Pack of 4
3 comments 4 595,99 Kč + -
Elfcam® – 100G QSFP28 Transceiver Module QSFP28 100GBASE 1310nm 10/40/80km DOM LC Duplex SMF, Pack of 1 (Ref: 21161)
3 comments 4 353,99 Kč + This product has multiple variants. The options may be chosen on the product page -
Sale!
Elfcam® – 100G QSFP28 LR4 Transceiver Module QSFP28 100GBASE-LR4 1309nm 10km DOM LC Duplex, Pack of 1 (Ref: 21164)
3 comments Original price was: 14 513,99 Kč.14 029,99 KčCurrent price is: 14 029,99 Kč. + -
Sale!
Elfcam® – 100G QSFP28 SR4 Transceiver Module QSFP28 100GBASE-SR4 850nm 100m DOM MTP/MPO, compatible with Nvidia/Mellanox/Arista/Cisco/HPE/Juniper/Marvell, Pack of 1 (Ref: 21161)
3 comments Original price was: 3 869,99 Kč.1 208,99 KčCurrent price is: 1 208,99 Kč. + This product has multiple variants. The options may be chosen on the product page -
Sale!
100G QSFP28 BIDI Transceiver Module QSFP28-BIDI-100G 100GBASE TX1291/RX1311 and TX1311/1291 1 Pair
4 comments 100G QSFP28 BIDI, 10KM – 100G QSFO28 BIDI, 20KM Original price was: 48 356,99 Kč.45 937,99 KčCurrent price is: 45 937,99 Kč. + This product has multiple variants. The options may be chosen on the product page
100G cables — AOC & DAC
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Sale!
Elfcam – Twinax DAC QSFP28 to QSFP28 100G Cable, 100GBASE-CR Passive Copper Cable, Compatible with Nvidia/Cisco/Dell/Intel/Arista/HPE Aruba (Ref: 25358)
2 comments 0.5M – 3M Original price was: 627,99 Kč.603,99 KčCurrent price is: 603,99 Kč. + This product has multiple variants. The options may be chosen on the product page -
Sale!
Elfcam® – 100Gbit/s OM3 QSFP28 to QSFP28 AOC Fiber Optic Cable (Ref: 24965)
3 comments 1M – 100M Original price was: 3 143,99 Kč.2 901,99 KčCurrent price is: 2 901,99 Kč. + This product has multiple variants. The options may be chosen on the product page
MPO/MTP cables for 100G SR4
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Sale!
MPO Female to MPO Female Optical Fiber Cable, Multimode OM3 50/125um LSZH, compatible with Nvidia/Mellanox/Arista/Cisco/HPE/Juniper/Marvell, Type B (12 Fibers) (Ref:6759)
5 comments 1M – 30M Original price was: 700,99 Kč.603,99 KčCurrent price is: 603,99 Kč. + This product has multiple variants. The options may be chosen on the product page -
Sale!
Elfcam® – 12 Fiber MPO/APC Female to MPO/APC Female Optical Fiber Cable, Type B Polarity, Single Mode OS2 for 40G QSFP+, compatible with Nvidia/Mellanox/Arista/Cisco/HPE/Juniper/Marvell, 100G QSFP28 (Ref: 19322)
2 comments 1M – 100M Original price was: 482,99 Kč.434,99 KčCurrent price is: 434,99 Kč. + This product has multiple variants. The options may be chosen on the product page
Complete 100G guide: see our 100G Data Centre solution page to choose between QSFP28 SR4, LR4, DAC or AOC based on your infrastructure.
Which switch do these modules plug into?
A QSFP28 module is only useful if there is a port to take it. Our L3 managed Ethernet chassis offer from 2 to 32 100G ports depending on their place in the fabric — access switch or spine.
FAQ — 25G / 40G / 100G transceiver modules
1How to choose between QSFP28 SR4, LR4 and BiDi?
- SR4 (850nm, MPO): short distance ≤ 100m over OM3/OM4 fibre — intra-rack and inter-rack in server rooms.
- LR4 (1309nm, LC): long distance up to 10km over OS2 single-mode fibre — inter-building or DCI.
- BiDi (1291/1311nm): a single fibre for both directions — saves cabling if fibre is already installed.
2What's the difference between DAC, AOC and transceiver + fibre cable?
- DAC (direct copper): ≤ 5m, cheaper, zero power draw — ideal for intra-rack top-of-rack.
- AOC (active fibre): up to 100m, lightweight, no separate SFP — long-reach inter-rack.
- Transceiver + fibre cable: flexible, unlimited distances, individual hot-plug — permanent infrastructure.
3Are your modules compatible with my Cisco / Arista / Mellanox switch?
Yes. Every Elfcam module is custom coded for the brand of your equipment. Use the configurator above or contact us with the exact model of your switch — we verify compatibility before shipping.
4Which fibre to use with a QSFP28 SR4 100G?
The QSFP28 SR4 uses OM3 or OM4 multimode fibre with an MPO/MTP 12-fibre connector. Max distance: 70m on OM3, 100m on OM4. For longer distances, choose the QSFP28 LR4 with OS2 single-mode fibre and LC Duplex connector.
5Can a QSFP28 be used in a QSFP+ slot?
Only if the switch supports "QSFP28 backward compatible" mode. In that case the port operates at 40G. Check your equipment datasheet — some Arista and Mellanox switches accept both, others require a firmware update.
6What is the warranty and delivery time?
All Elfcam modules come with a lifetime warranty. Next business day shipping from our France stock. Free return if the module fails to initialise on your equipment.
