NVIDIA Mellanox® MCP7F00-A01AG — 100GbE→4×25GbE QSFP28 to 4×SFP28 Passive Hybrid DAC 1.5m
Technical Identity
The NVIDIA Mellanox® MCP7F00-A01AG is a 1.5m passive copper hybrid splitter DAC with a single QSFP28 connector (100GbE) on the switch end and four SFP28 connectors (25GbE each) on the server end. No active electronics, no retimers, no signal conditioning — pure passive twin-axial copper. Used for top-of-rack fan-out from one 100GbE switch port to four independent 25GbE server NICs, reducing port count, cable bulk, and per-port cost in 25GbE access layers. Condition: Refurbished — EU stock, EEPROM-verified, T.E.S IT-SOLUTIONS B2B supply.
Specifications

Brand: NVIDIA Mellanox
Model / MPN: MCP7F00-A01AG
Product family: LinkX Passive Copper Hybrid Cables
Product type: Passive copper hybrid splitter DAC (1:4 breakout)
Switch end: 1× QSFP28 (100GbE)
Server ends: 4× SFP28 (25GbE each)
Aggregate bandwidth: 100Gb/s (4× 25Gb/s legs)
Length: 1.5m
Medium: Passive twin-axial copper (AWG30)
Protocol: Ethernet 100GbE / 25GbE (NRZ)
Power draw: 0 W (passive)
EEPROM: NVIDIA-coded, switch- and NIC-readable
Condition: Refurbished

What This Is NOT

NOT active. Passive copper only — no retimers, no CDR, no signal conditioning. Switch port MUST be configured in 4×25GbE breakout mode.
NOT QSFP56, QSFP-DD, or OSFP. QSFP28 switch-end only.
NOT InfiniBand. Ethernet 100GbE / 25GbE only — not for EDR/HDR IB fabrics.
NOT a single-link 100GbE DAC. This is a 1:4 hybrid splitter, not a straight QSFP28-to-QSFP28 cable.
NOT supplied with adapters, switches, transceivers, or rack hardware.

Compatibility & Constraints

Switch (QSFP28 end): Any 100GbE QSFP28 switch port that supports 4×25GbE breakout — e.g. NVIDIA Spectrum SN2000/SN2100/SN2410/SN2700 series, Cisco Nexus 9000 25/100GbE, Arista 7050/7060, Dell PowerSwitch S5200, Mellanox SX1710 (with appropriate firmware). Switch breakout mode must be enabled in software before link comes up.
Server (SFP28 ends): Any 25GbE SFP28-cage NIC — ConnectX-4 Lx, ConnectX-5, ConnectX-6 Lx, ConnectX-6 Dx, Intel XXV710, Broadcom NetXtreme, or equivalent.
Reach: Intra-rack only (1.5m). Use AOC variants (MFA7A50-Cxxx) for inter-rack runs.
Cooling: Passive — no airflow requirements.

Frequently Asked Questions (FAQ)
Q. What is the MCP7F00-A01AG?
1.5m passive copper hybrid DAC: 1× QSFP28 (100GbE) → 4× SFP28 (25GbE each). Switch port must be in 4×25GbE breakout mode.
Q. Is MCP7F00-A01AG passive or active?
Passive — no signal-conditioning electronics. Switch must be in 4×25GbE breakout mode.
Q. What is the difference between the NEW and Refurbished version?
Same cable specification. Refurbished units are inspected and EEPROM-verified before shipping.
Q. What NICs work on the 4 SFP28 ends?
Any 25GbE SFP28-cage NIC — ConnectX-4 Lx, ConnectX-5, ConnectX-6 Lx, or equivalent.
Q. What condition does T.E.S IT-SOLUTIONS supply?
Refurbished — inspected and verified, EU stock, global B2B shipping.
Why buy from T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS is a Europe-based data-center networking specialist. Every unit is MPN-identified, EEPROM-verified, and cosmetically inspected before leaving our EU warehouse. Multi-currency invoicing, worldwide express shipping, and free pre-sale technical consultation included.