NVIDIA MMA1Z00-NS400 Compatible 400G QSFP112 SR4 Transceiver — MPO-12/APC, 850nm MMF, for BlueField-3 and ConnectX-7 QSFP112

QSFP112 — the BlueField-3 module, not the OSFP one. $549.00 at Resilient Tec.

NVIDIA MMA1Z00-NS400 compatible — 400G QSFP112 SR4, 850nm multimode, four 100G-PAM4 lanes over a single MPO-12/APC interface.

→ NVIDIA OSFP part-number crosswalk — Mellanox MMA/MMS numbers mapped to the new NVIDIA 980- numbers, with form factor, optics and the correct part for each end of the link.

OEM Equivalent: NVIDIA / Mellanox MMA1Z00-NS400
Description: Single-port QSFP112 SR4 optical transceiver, 400Gb/s, MPO-12/APC, multimode, InfiniBand NDR and Ethernet

NVIDIA's NDR generation ships 400G SR4 optics in two different shells. The optics inside are the same: 4 × 100G-PAM4, 850nm VCSEL, one MPO-12/APC connector, 50m on OM4. The cage is not.

• MMA1Z00-NS400 — QSFP112. This part, $549.00. For BlueField-3 DPUs and ConnectX-7 adapters in their QSFP112 form.
• MMA4Z00-NS400 — OSFP, flat-top (RHS), $579.00. For ConnectX-7 and ConnectX-8 single-port OSFP.

The two part numbers differ by one character, describe themselves almost identically on a datasheet, and differ in the single thing that decides whether the module physically seats.

The rule worth memorising: a BlueField-3 never takes OSFP. NVIDIA states plainly that BlueField-3 adapters accept QSFP112 devices only, and that OSFP is not for use in BlueField-3 DPUs. If a BlueField-3 line is on your PO and someone has quoted you an MMA4Z00-NS400 against it, that quote is wrong — the module will not go in.

NVIDIA documents this module in the same two topologies as its OSFP sibling. In both, the far end is a twin-port 800G module in the switch — the MMA4Z00-NS in a Quantum-2 InfiniBand or Spectrum-4 Ethernet switch.

Both fibers on the twin-port switch module must be the same type — two straight cables or two splitters, never one of each. And a splitter does not give you 400G per leg: each split end carries two of the four channels, so the adapter negotiates down to 200G silently, with nothing to flag it. We build 1:2 MPO-12/APC splitters to order.

Same fiber as the OSFP part, and the same trap: MPO-12/APC — angle-polished at 8°, Type B crossover, female/unpinned. The module carries the alignment pins; the cable carries the holes.

The MPO-12/UPC cords in an existing 100G or 200G fabric are flat-polished and cannot mate with an NDR module. If you are upgrading rather than building new, none of your current MPO patch cords come forward with you — budget the fiber alongside the optics. The full MPO-12/APC vs UPC guide covers endface, pinning, polarity and the key-up-to-key-down rule most published guidance gets wrong.

In stock now: MPO-12/APC OM4 Type B trunk cable, female-to-female, 1 m to 20 m, $59.00 to $139.00, and the genuine NVIDIA MFP7E10-N005 5 m assembly at $44.95.

• QSFP112 is not QSFP-DD, and not QSFP56. It carries four 100G-PAM4 lanes in a QSFP-sized shell. A QSFP-DD module will not seat in it and vice versa — see OSFP vs QSFP-DD for where each form factor lives.
• Flat-top and finned-top do not apply here. That distinction belongs to the OSFP family, where the question is whether the module or the cage carries the heatsink. QSFP112 has one shape. If someone is asking you which top style you need on a QSFP112 part, they are quoting from the wrong family — here is the rule that actually applies.
• Reach is the module's, not the channel's. The 50 m OM4 figure already assumes patch panels in the path, which is four connector junctions. More hops means less usable distance.
• Coding matters more than the glass. A module that is not coded for the specific host platform can be flagged or rejected even when the optics are perfect — what to check before buying compatible NDR optics.
• If the run is short enough, skip the optics. Copper sidesteps the coding and fiber questions entirely — where that line falls.

Your adapter is a BlueField-3 DPU or a ConnectX-7 in QSFP112. The cage is QSFP112, not OSFP. Your fiber plant is multimode (OM3 or OM4) with MPO-12/APC connectors. Your runs are 50 m or shorter. You want 400G NDR InfiniBand or 400G Ethernet, or 200G off a splitter.

$549.00 · In stock at Resilient Tec.
Quantities are limited. For volume, tell us the quantity and the host platform and we will quote it. Request a quote →

Shipped from Knoxville, Tennessee. Free standard shipping on all US orders, no minimum. POs and net terms available for qualified business accounts. Populating a pod? Tell us the node count and the module part numbers at both ends and we will quote the optics and the fiber together.

Warranty: lifetime, backed by Resilient Tec — not a manufacturer term. When a module fails you reach a named seller in Knoxville, not a ticket queue.

• MMA4Z00-NS — 800G OSFP SR8 twin-port finned-top (IHS) — $829.00, the switch-side module at the far end. One of those feeds two of these.
• MMA4Z00-NS400 — 400G OSFP SR4 flat-top (RHS) — $579.00, the OSFP sibling, for ConnectX-7/ConnectX-8 single-port OSFP and DGX ports
• MPO-12/APC OM4 multimode trunk cable, Type B, female-to-female — $59.00 to $139.00, one per module, 1 m to 20 m, in stock
• MFP7E10-N005 — 5 m MPO-12/APC multimode fiber — $44.95, genuine NVIDIA
• MPO-12/APC 1:2 splitter cables — built to order, for NDR200 fan-out from one twin-port switch port to four adapters
• NVIDIA OSFP part-number crosswalk — check a part number against your ports before the PO goes out
• Transceivers — the rest of the optics catalog

MPO-12/APC vs UPC: Why Your Existing Fiber Won't Work With NDR Optics

Does the MMA4Z00-NS400 Work With My System? ConnectX-7, BlueField-3, Quantum-2 and DGX H100 Compatibility

Flat-Top or Finned-Top OSFP? How to Tell Which Module Your ConnectX-7 Actually Needs

Is a Third-Party MMA4Z00-NS or MMA4Z00-NS400 Safe? What to Check Before You Buy

OSFP vs. QSFP-DD: A Practical Breakdown for GPU Clusters

What Is NDR InfiniBand Actually Used For? ConnectX-7, Quantum-2 and Real AI Cluster Fabrics Explained

Why 800G and 400G NVIDIA Optics Have 40+ Week Lead Times in 2026