40G QSFP+ to QSFP+ Direct Attach Copper Cable 24AWG Passive 10M QDR

This 40G QSFP+ passive DAC cable delivers cost-effective, low-latency connectivity for short-range data center applications. Featuring 24AWG copper construction, it ensures stable 40Gbps performance over distances up to 10 meters. Ideal for high-density environments, it simplifies deployment with reliable plug-and-play operation.

SKU DAC-40GQSFP-P10 Category
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The 40G QSFP+ to QSFP+ Passive Direct Attach Copper (DAC) Cable (24AWG, 10m) is engineered for reliable, high-speed data transmission in short-range data center environments. Designed to deliver stable 40Gbps connectivity, it provides a cost-effective and energy-efficient alternative to optical transceivers for interconnecting QSFP+ ports.

With its robust 24AWG copper construction, this cable ensures excellent signal integrity, low insertion loss, and minimal latency over extended short distances. It is ideal for linking switches, routers, and server interfaces within racks or across adjacent racks, supporting both 40G Ethernet and InfiniBand protocols.

Built to FiberMania’s strict quality standards, each cable undergoes comprehensive performance testing to guarantee durability, consistency, and long-term operational reliability in demanding networking scenarios.

Featured DAC & AOC Cable Solutions

SKU Cable Type Data Rate Form Factor A Form Factor B Wire Type Length
AOC-100GQSFP28-5 AOC 100G QSFP28 QSFP28 OM4 Fiber Cable 5M
AOC-10GSFP-10 AOC 10G SFP+ SFP+ OM4 Fiber Cable 10M
AOC-25GSFP28-3 AOC 25G SFP28 SFP28 OM4 Fiber Cable 3M
AOC-40GQSFP-10 AOC 40G QSFP+ QSFP+ OM3 Fiber Cable 10M
AOC-QSFP-10G4SFP-5 AOC 40G QSFP+ 4*SFP+ OM3 Fiber Cable 5M
AOC-QSFP28-4SFP28-3 AOC 100G QSFP28 4×SFP28 OM3 Fiber Cable 3M
DAC-100GQSFP28-25G4SFP28-P5 DAC 100G QSFP28 4×SFP28 24AWG 5M
DAC-100GQSFP28-P3 DAC 100G QSFP28 QSFP28 26AWG 3M
DAC-10GCX4-P05 DAC 10G CX4 CX4 28AWG 3M
DAC-10GSFP-P10 DAC 10G SFP+ SFP+ 24AWG 10M
DAC-10GSFP-XFP-A10 DAC 10G SFP+ XFP 24AWG 10M
DAC-400GQSFP-P5 DAC 400G QSFP-DD QSFP-DD 30AWG 5M
DAC-40GQSFP-P07 DAC 40G QSFP+ QSFP+ 28AWG 7M
DAC-QSFP-10G4SFP-P03 DAC 40G QSFP+ 4 * SFP+ 30AWG 3M
DAC-SFP-P05 DAC 1.25G SFP SFP 30AWG 5M
Cable TypeCopper
Active / PassivePassive
Connector TypeQSFP+ to QSFP+
Cable Gauge24 AWG
Cable Length10 m
Data Rate / Protocol40 Gbps QDR
Features / NotesHigh-speed QDR passive
  • QSFP+ to QSFP+ interface for seamless 40G interconnection
  • 24AWG copper conductors for enhanced signal stability over longer DAC lengths
  • Passive design with ultra-low power consumption
  • Supports data rates up to 40Gbps (40GBASE-CR4 compliant)
  • Optimized for low latency and minimal signal attenuation
  • Plug-and-play deployment with no firmware or configuration required
  • Fully tested for insertion loss, return loss, and crosstalk performance
  • 40 Gigabit Ethernet (40GBASE-CR4) deployments
  • InfiniBand SDR / DDR / QDR environments
  • Data center Top-of-Rack (ToR) and End-of-Row (EoR) connectivity
  • Switch-to-switch and switch-to-server interconnects
  • High-performance computing (HPC) clusters
  • Storage area networks (SAN) and networked storage systems

FiberMania provides flexible OEM/ODM solutions to meet diverse project requirements:

  • Custom cable lengths (e.g., 0.5m to 15m or longer on request)
  • Cable gauge options (24AWG / 26AWG / 30AWG)
  • Connector EEPROM programming (vendor compatibility coding)
  • Private labeling (logo, packaging, labeling design)
  • Custom jacket materials, colors, and fire ratings (LSZH, PVC)
  • Bulk packaging or retail-ready packaging options

Customize DAC & AOC High-Speed Cable Solution

Cable Type Passive DAC / Active DAC (ACC) / Active Optical Cable (AOC)
Form Factor SFP+ / SFP28 / QSFP+ / QSFP28 / QSFP56 / QSFP-DD / OSFP
Data Rate 10G / 25G / 40G / 50G / 100G / 200G / 400G / 800G
Cable Length 0.5m–15m (DAC) / 1m–100m (AOC)
Transmission Medium Twinax Copper / Multimode Optical Fiber
Connector Compatibility Cisco / NVIDIA / Arista / Juniper / Dell / HPE / Generic Compatible
Jacket Type PVC / LSZH
EEPROM Coding OEM Compatible Programming Available
Operating Temperature Commercial / Industrial Grade

Q1: What is the maximum supported distance for this passive DAC cable?
A1: Passive DAC cables typically support distances up to 7–10 meters depending on AWG; this 24AWG version is optimized for stable 10m transmission.

Q2: Is this cable compatible with different switch brands?
A2: Yes, it can be programmed for compatibility with major brands (e.g., Cisco, Juniper, Arista) via EEPROM customization.

Q3: What is the difference between 24AWG and thinner DAC cables?
A3: 24AWG cables offer lower signal attenuation and better performance over longer distances compared to 26/30AWG, but are thicker and less flexible.

Q4: Does this DAC cable support auto-negotiation?
A4: Auto-negotiation depends on the connected devices; the cable itself transparently supports compliant QSFP+ interfaces.

Q5: Can this cable be used for breakout configurations?
A5: No, this is a straight QSFP+ to QSFP+ cable. Breakout applications require QSFP+ to 4x SFP+ DAC cables.

Q6: How is signal integrity verified during production?
A6: Each cable is tested for key parameters including insertion loss, return loss, impedance, and crosstalk to ensure consistent high-speed performance.