NVIDIA · Optical Transceivers & SFP
NVIDIA LinkX optical transceivers
NVIDIA LinkX transceivers, formerly Mellanox, connect Quantum InfiniBand and Spectrum Ethernet switches to ConnectX adapters, and they are ordered by an exact part number. The number fixes the form factor, the data rate, the fibre type and whether the module has a finned or a flat top, which decides whether it belongs in a switch or in an adapter. This page lists the 25G, 100G, 400G, 800G and 1.6T modules that CRS PLUS sources.
Catalogue
Equipment reference
| Part Number | Model / Designation | Compatibility | Band / Interface | Condition | Lead Time | Quote |
|---|---|---|---|---|---|---|
| MMA1B00-C100D | 100GBASE-SR4 QSFP28 transceiver | 100GbE | 850 nm multimode · MPO-12 · up to 100 m | On enquiry | On enquiry | |
| MMA1Z00-NS400 | 400G SR4 QSFP112 transceiver | InfiniBand NDR / 400GbE | 850 nm multimode · MPO-12/APC · up to 50 m | On enquiry | On enquiry | |
| MMA2P00-AS | 25GBASE-SR SFP28 transceiver | 25GbE | 850 nm multimode · LC duplex · up to 100 m | On enquiry | On enquiry | |
| MMA4Z00-NS | 800G 2×SR4 twin-port OSFP transceiver, finned top | InfiniBand 2 × NDR / 2 × 400GbE | 850 nm multimode · 2 × MPO-12/APC · up to 50 m | On enquiry | On enquiry | |
| MMA4Z00-NS400 | 400G SR4 single-port OSFP transceiver, flat top | InfiniBand NDR / 400GbE | 850 nm multimode · MPO-12/APC · up to 50 m | On enquiry | On enquiry | |
| MMS1X00-NS400 | 400G DR4 QSFP112 transceiver | InfiniBand NDR / 400GbE | 1310 nm single-mode · MPO-12/APC · up to 500 m | On enquiry | On enquiry | |
| MMS4A00-XMAlso: 980-9IAH1-00XM00 | 1.6T 2×DR4 twin-port OSFP transceiver | InfiniBand 2 × XDR | 1310 nm single-mode · 2 × MPO · up to 500 m | On enquiry | On enquiry | |
| MMS4A20-XM800Also: 980-9IAT0-00XM00 | 800G DR4 single-port OSFP transceiver, riding heat sink | InfiniBand XDR | 1310 nm single-mode · MPO · up to 500 m | On enquiry | On enquiry | |
| MMS4X00-NS400 | 400G DR4 single-port OSFP transceiver, flat top | InfiniBand NDR / 400GbE | 1310 nm single-mode · MPO-12/APC · up to 500 m | On enquiry | On enquiry |
Cannot find a part number? Send us the number and we will identify and price it.
How to read these part numbers
The prefix states the fibre type: `MMA` modules are multimode, short-reach parts at 850 nm, and `MMS` modules are single-mode parts at 1310 nm. The suffix states the rate and the application: `-NS` is a twin-port 800G module carrying two 400G links, `-NS400` a single 400G link, and `-XM` the XDR generation for Quantum-X800.
Twin-port OSFP modules with a finned top, such as `MMA4Z00-NS`, are intended for air-cooled switch ports. Single-port, flat-top modules such as `MMA4Z00-NS400` are intended for adapter ports, where the cage provides the heat sink. Newer XDR modules also carry a `980-` ordering number, shown beside the model.
Ordering notes
State both ends of the link when ordering. A typical NDR connection uses one twin-port 800G module in the switch and two single-port 400G modules in the adapters, joined by MPO-12/APC fibre; an angled (APC) connector is required and a flat-polished (UPC) patch cord will not work. Confirm multimode or single-mode fibre against the installed cabling.
Finned-top and flat-top versions of the same optical class are different part numbers and are not interchangeable between switch and adapter cages. Fibre patch cords and breakout cables are quoted separately.
Lifecycle and availability
These are current LinkX parts and are sourced to order against confirmed supply, as new units or as new surplus with condition stated per line. Certain high-performance networking and computing products are subject to export control, and where that applies the transaction is completed only after compliance checks are satisfied for the stated end destination and end use.
Equipment condition
New — factory-sealed, supplied through the manufacturer's own channel or a qualified distributor, with full manufacturer warranty.
New surplus — unused factory stock, original packaging where available, sourced from decommissioned projects or distributor inventory. Manufacturer warranty may have lapsed; CRS PLUS warranty applies.
Refurbished / tested — previously deployed equipment, cleaned, firmware-checked and functionally tested against the manufacturer's specification before shipment. CRS PLUS warranty applies.
Condition is confirmed in writing on every quotation before you commit to an order.
Warranty
Warranty terms vary by item, by condition and by the supplier the equipment is sourced from. They are stated in writing on the quotation, per line item, before you commit to an order.
Where equipment is supplied new through the manufacturer's own channel, the manufacturer's warranty applies and is passed to you.
Send us the part numbers you need and we will confirm warranty terms alongside availability, condition, lead time and price.
Questions
Frequently asked questions
Do you hold NVIDIA transceivers in stock?
Listing here does not indicate stock held by CRS PLUS. Every line is sourced through our qualified supplier base, and availability, condition and lead time are confirmed against your enquiry before you commit. Condition is stated explicitly on every quotation.
What is the difference between the MMA4Z00-NS and the MMA4Z00-NS400?
The MMA4Z00-NS is a twin-port 800G OSFP module with a finned top, carrying two 400G SR4 links, and it is used in air-cooled switch ports. The MMA4Z00-NS400 is a single-port 400G SR4 OSFP module with a flat top, used in adapter ports. One MMA4Z00-NS in a switch typically connects to two MMA4Z00-NS400 modules in adapters.
Which transceivers are multimode and which are single-mode?
Part numbers beginning MMA are multimode modules for short reach at 850 nm, up to 50 m at 400G and 800G and up to 100 m at 25G and 100G. Part numbers beginning MMS are single-mode modules at 1310 nm with a reach of up to 500 m.
Can you supply a part number that is not listed on this page?
Yes. This page lists 9 line items currently identified in our supplier network, and it is not the limit of what we source. Send the part number, or the machine model and the position the part occupies, and we will identify and price it.
What condition is the equipment supplied in?
New, new-old-stock and tested refurbished are all sourced, and the condition of each line is stated on the quotation before you commit. Where a part is end-of-sale, no manufacturer warranty applies and this is said plainly rather than implied.
Which markets do you deliver to?
CRS PLUS serves buyers across the Middle East and Africa from a supplier base in China, Europe and the United States. Delivery terms and destination are confirmed per enquiry, and shipping is quoted alongside the goods.
What is the price of NVIDIA LinkX transceivers?
CRS PLUS does not publish list prices: the price of each item depends on its condition (new, new surplus or refurbished), the quantity and the destination. Send the part number and quantity through the form on this page and a structured offer follows within 72 hours, with price, condition and lead time stated per line.
What is the lead time for NVIDIA LinkX transceivers?
Lead time depends on where stock is held at the time of your enquiry, so it is confirmed per line on the quotation, together with the condition of each unit. Items that are no longer in production are quoted as new surplus or as tested refurbished units.
Can CRS PLUS propose an alternative if a part number is discontinued or unavailable?
Yes. Where a part cannot be found in the quantity required, our engineers propose an equivalent that delivers the same function from parts that are available, and state the trade-offs in writing before you commit.
Related pages
Manufacturer names, product names and part numbers are the property of their respective owners and are used here for identification purposes only. CRS PLUS sources these products through its qualified supplier base and holds no distributor, reseller or agency appointment from any manufacturer listed.
This catalogue is compiled from our supplier network's available inventory and from manufacturer product documentation, and is reviewed monthly. Listing does not indicate stock held by CRS PLUS — availability, condition and lead time are confirmed per enquiry. Last reviewed: 11 November 2026.
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