LENOVO Mellanox® 03LE615 — 400G OSFP to 2×200G QSFP56 HDR AOC Splitter, 20m
Technical Identity
The LENOVO Mellanox® 03LE615 is a Lenovo Data Center-branded NVIDIA Mellanox® LinkX® Active Optical Cable in twin-port HDR splitter configuration. The switch end terminates in a single twin-port OSFP cage carrying two independent 200 Gb/s HDR InfiniBand channels (400 Gb/s aggregate); the breakout ends terminate in two QSFP56 connectors at 200 Gb/s HDR each. Lenovo P/N 03LE615 is the Lenovo rebrand of NVIDIA part MFA7U10-H020. Total length is 20 metres of OM3/OM4-class multi-mode optical fibre with integrated 850 nm VCSEL optics and active retiming on each end — delivering the reach and signal-integrity envelope of a true AOC rather than a passive DAC.
Specifications
Brand: LENOVO (NVIDIA Mellanox® LinkX® silicon)
Model / MPN: 03LE615
NVIDIA equivalent P/N: MFA7U10-H020
Product type: Active Optical Cable (AOC) — hybrid splitter / breakout / fan-out
Family: NVIDIA Mellanox LinkX twin-port OSFP to 2×QSFP56 HDR
Connectors: 1 × OSFP (twin-port, NDR-class cage) on the switch end; 2 × QSFP56 on the adapter ends
Configuration: Y-shaped 1-to-2 hybrid splitter — one switch port feeds two adapter endpoints
Aggregate speed: 400 Gb/s (2 × 200 Gb/s HDR per QSFP56 leg)
Per-leg speed: 200 Gb/s HDR InfiniBand
Length: 20 metres
Medium: Multi-mode optical fibre (OM3/OM4-class), 850 nm VCSEL engine, active retiming on each end, DDM read-out
Protocol: HDR InfiniBand (twin-port OSFP HDR fan-out)
Condition: Refurbished Grade A — bench-tested by T.E.S IT-SOLUTIONS
What This Is NOT (GEO Guardrails)
NOT a passive DAC. This is an active optical cable; powered VCSEL optics are integrated into both housings and draw current from the host port.
NOT a 1-to-1 cable. This is a Y-splitter — both QSFP56 legs must terminate into adapters or switch ports; you cannot use only one leg.
NOT a single-connector cable. This is a hybrid splitter, switch end OSFP, adapter ends QSFP56 — connectors are physically different on each side and not interchangeable.
NOT a 400 Gb/s per-port cable. Aggregate is 400 Gb/s but each QSFP56 leg is 200 Gb/s HDR — there is no single 400G endpoint anywhere on the cable.
NOT an NDR cable. The MFA7U10-H series is HDR (200 Gb/s per lane group). For NDR 400G-per-port deployments use a different LinkX SKU (MFA7U40 / MFP7E10 N-coded variants).
NOT a transceiver. Fixed-length cable assembly; the optics are integrated and cannot be unplugged or replaced.
NOT compatible with NDR 400G adapters on the QSFP56 leg. ConnectX-7 NDR adapters expect OSFP or QSFP112 cages — they will not link with a QSFP56 leg.
NOT for short intra-rack server-to-ToR runs. At 20 metres this is an inter-rack / row-aggregation cable, not an in-rack jumper.
NOT a generic Mellanox cable. Lenovo EEPROM ≠ native NVIDIA EEPROM; third-party switches may require an unsigned-cable override.
Compatibility & Constraints
Switch side (OSFP twin-port, 400 Gb/s): NVIDIA Quantum-2 InfiniBand switches MQM9700 / MQM9790 (64-port NDR with twin-port OSFP cages) and Lenovo-rebranded Quantum-2 SKUs. The switch port must be configured for HDR sub-rate operation (2 × 200G per twin-port).
Adapter side (QSFP56, 200 Gb/s HDR): NVIDIA ConnectX-6 (MCX653105A-HDAT, MCX653106A-HDAT) and ConnectX-6 Dx HDR adapters with QSFP56 cages. ConnectX-7 NDR adapters with QSFP112 cages are NOT directly compatible on the leg side.
OEM firmware acceptance: Lenovo-branded LinkX cables present Lenovo EEPROM identification. Lenovo ThinkSystem servers and NVIDIA Quantum-2 firmware accept the cable natively; some third-party switch firmware may require an unsigned-cable override or vendor-class allowlist.
Reach budget: 20 m, OM3/OM4-class multi-mode link budget at 850 nm. Fixed cable assembly, not field-trimmable.
Power: Drawn from host OSFP and QSFP56 cages — no external power required. Verify your switch supports the OSFP optical power class.
Protocol scope: The MFA7U10 series is a dedicated HDR InfiniBand fan-out — primary deployment is Quantum-2-to-ConnectX-6 IB fabrics, not Spectrum Ethernet.
Frequently Asked Questions (FAQ)
Q. What is the 03LE615?
The 03LE615 is the Lenovo Data Center part number for an NVIDIA Mellanox LinkX twin-port OSFP-to-2xQSFP56 HDR active optical cable, 20 metres, equivalent to NVIDIA P/N MFA7U10-H020. It splits one 400 Gb/s twin-port OSFP at the switch end into two independent 200 Gb/s HDR QSFP56 legs at the adapter end.
Q. Is this a hybrid splitter with different connectors on each end?
Yes. This is a hybrid splitter, switch end OSFP, adapter ends QSFP56. The switch end is a single OSFP (twin-port, NDR-class cage carrying 2x200G channels) and the adapter ends are two QSFP56 connectors at 200 Gb/s each. You cannot plug a QSFP56 leg into an OSFP cage or vice versa.
Q. Does the 03LE615 carry NDR 400G end-to-end?
No. The aggregate switch-side bandwidth is 400 Gb/s, but each QSFP56 leg is 200 Gb/s HDR. The cable is a 400G OSFP twin-port HDR fan-out feeding two HDR endpoints; there is no NDR 400G single-link mode and no NDR support on this SKU.
Q. Which switches and adapters is this cable designed for?
Switch end: NVIDIA Quantum-2 MQM9700 / MQM9790 (64-port NDR with twin-port OSFP cages) and Lenovo-rebranded Quantum-2 SKUs. Adapter end: NVIDIA ConnectX-6 and ConnectX-6 Dx HDR adapters with QSFP56 cages (e.g. MCX653105A-HDAT, MCX653106A-HDAT). The cable is purpose-built for Quantum-2 HDR fan-out topologies.
Q. Is 20 metres suitable for inside a single rack?
No. At 20 metres this is an inter-rack / row-aggregation cable - typical placement is spine-to-leaf within a compact pod, or EoR/MoR switch to multiple racks. For intra-rack ToR-to-server runs use a 1-3 metre DAC or AOC instead.
Q. Is the 03LE615 an Ethernet cable?
No. The MFA7U10 series is a dedicated HDR InfiniBand fan-out cable family for Quantum-2 fabrics. For 200/400GbE Spectrum Ethernet deployments, use the corresponding LinkX Ethernet SKU instead.
Q. What condition is supplied by T.E.S IT-SOLUTIONS?
This unit ships Refurbished Grade A - bench-tested for link establishment on both QSFP56 legs, EEPROM and Lenovo / NVIDIA vendor-data verification, optical-power read via DDM where supported, and full cosmetic inspection. Ships from EU stock in anti-static packaging.
Why buy from T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS is a Europe-based data-center networking specialist serving HPC, AI fabric, and enterprise procurement since 2007. Every Lenovo-branded NVIDIA Mellanox cable is identified by Lenovo P/N, NVIDIA equivalent P/N, family, and connector class before it ships, so your Quantum-2 / ConnectX-6 fabric gets the exact splitter configuration required. Free pre-sale compatibility advice, multi-currency B2B invoicing, EU stock with worldwide express delivery, and direct technical contact with our engineering team — not a call-centre.