40G QSFP+ to QSFP+ QDR Direct Attach Copper Cable 30AWG Passive 5M

This 40G QSFP+ to QSFP+ passive DAC cable supports QDR 40G Ethernet transmission with 30AWG twinax construction, delivering reliable short-reach connectivity for modern data center networks.

SKU DAC-40GQSFP-P05 Category
Share this product with

The 40G QSFP+ to QSFP+ QDR direct attach copper cable is designed for high-speed short-reach interconnects in data center and enterprise networking environments. It supports 40G QDR (Quad Data Rate) applications, delivering stable, low-latency performance between QSFP+ ports.

Built with passive twinax copper construction and 30AWG wire gauge, this cable provides an efficient and cost-effective alternative to optical transceivers for short-distance links. It requires no external power and ensures reliable signal integrity for rack-to-rack or adjacent rack connectivity. The 5-meter length makes it suitable for flexible deployment in medium-range intra-data center cabling 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 TypePassive DAC
ConnectorQSFP+ to QSFP+
Data Rate40G QDR (4x10G lanes)
Cable Length5 m
Wire Gauge30AWG
MediumTwinax Copper
Power RequirementPassive (No power needed)
LatencyUltra-low
Operating Temperature0°C to +70°C
Storage Temperature-40°C to +85°C
Standards ComplianceIEEE 802.3ba | RoHS
  • QSFP+ to QSFP+ direct attach copper cable
  • Supports 40G QDR high-speed transmission
  • Passive twinax design (no power required)
  • 30AWG wire gauge for flexibility and routing efficiency
  • Low latency and stable signal integrity
  • Plug-and-play compatibility with QSFP+ ports
  • 5m length for flexible rack-to-rack deployment
  • Data center interconnects
  • Switch-to-switch backbone links
  • High-speed server connectivity
  • Enterprise and cloud networking infrastructure
  • HPC (High-Performance Computing) clusters
  • Storage area networks (SAN)

We provide OEM and ODM services for high-speed DAC and AOC cable assemblies. Custom options include cable length, wire gauge (30AWG/26AWG), connector coding, EEPROM programming, branding, and packaging. Both standard and enterprise-grade configurations are available to meet diverse networking requirements.

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 QDR in 40G QSFP+ cables?
A: QDR (Quad Data Rate) refers to 4x10G lanes used to achieve 40G transmission in QSFP+ systems.

Q2: Is this a passive or active cable?
A: This is a passive DAC cable, meaning it does not require external power for operation.

Q3: What is the advantage of DAC over optical transceivers?
A: DAC cables offer lower cost, lower power consumption, and minimal latency for short-distance connections.

Q4: Is 5m a long distance for passive DAC?
A: 5m is within the typical operating range for high-quality 30AWG passive DAC cables, suitable for intra-data center use.

Q5: Can this cable be used with all QSFP+ devices?
A: It is compatible with standard QSFP+ ports that support 40G Ethernet, subject to device compatibility.