40G Passive Direct Attach Cable DAC For Date Center / Fiber Channel

Basic Information
Place of Origin: Shenzhen, China
Brand Name: Gigaopto
Certification: CE, FCC, ROHS, ISO9001, ISO14000, MSDS, REACH, CP65, TUV, UL
Model Number: GD-Q10-4S10-0P5M
Minimum Order Quantity: 1
Price: negotiable
Packaging Details: Static bag, Plastic bag, Retail box or by required
Delivery Time: 1-5 work days
Payment Terms: T/T, L/C
Supply Ability: 50,000pcs/month
Detail Information
Product Name: 40G Breakout Active DAC Cable Bit-Rate: 40Gb/s
Cable: 4 Pair Twinax Copper Length: 0.5M
Passive Or Active: Passive Connector: QSFP+ 38pin Footprint + 4 SFP+ 20 Pin Footprint
Warranty: 3-Year Keywords: Passive Fan-out Copper Direct Attach Cable
High Light:

Passive Direct Attach Cable DAC


40G Direct Attach Cable DAC


DAC Direct Attach Cable

Product Description

40G Passive Direct Attach Copper Breakout Cable for Date Center / Fiber Channel




  • Fully compliant to the latest SFP+ & QSFP MSA
  • RoHS compliant
  • Cable Type: Passive Copper Cable
  • Up to 7m transmission
  • Wire AWG: AWG30/AWG26/AWG24
  • Connector 1: High-Density QSFP 38-PIN Connector (SFF-8436 Compliant)
  • Hot plug swappable
  • Temperature range (COM): 0~ 70 °C
  • Low power consumption: 0.02W (typ.)
  • Single 3.3V power supply
  • Connector 2: 4 x SFP+ 10GBASE 20-PIN Connector (SFF-8431 Compliant)
  • Up to 10.3125GBASE transfer rate per SFP+ channel (40GBASE aggregate)
  • Low cross-talk and pair-to-pair skew maintains signal integrity



This GD-Q10-4S10-0P5M is a passive fan-out copper direct attach cable with one QSFP+ end and four SFP+ 10G ends.

This DAC Cable provides short distance (same shelf) inexpensive connectivity at up to 40G rates. It operates 4 independent 10G channels using the QSFP connector footprint on one end and 4 independent SFP+ transceivers of 10Gbps each on the other end. Each of the four channels can operate at multi-rate speeds Gigabit to 10G (1 Gbps to 10.3125Gbps).

This breakout cable is compliant with SFF-8431, SFF-8432, SFF-8472 SFP+ MSA, SFF-8436 QSFP+ MSA standards.

The 40G Direct Attach cables is suitable for cost-effective close-range interconnections within the equipment room of telecom operators or data centers, etc.



Functional Specification


Product Name 40G Breakout Direct Attach Cable Max Data Rate 40Gbps
Electrical Interface 38 pins edge connector(QSFP+) 20 pins edge connector(SFP+) Management Interface Serial, I2C
Minimum Bend Radius 21mm Cable Length 0.5M to 7M
Cable type 4 pair twinax copper Wire Gauge 30AWG
Jacket Material PVC (OFNR) Power supply 3.3V
Compatible Brand MSA Compliant Operating Temperature 0 to 70°C (32 to 158°F)
Protocols 40G InfiniBand 8x DDR, 4x QDR, 10G/40Gigabit Ethernet, Fibre Channel



Ordering Information


Part Number Description Wire Gauge Minimum Bend Radius
GD-Q10-4S10-0P5M 40G QSFP+ to 4SFP+ Breakout DAC Cable, 0.5-meter, Passive 30AWG 21mm
GD-Q10-4S10-1M 40G QSFP+ to 4SFP+ Breakout DAC Cable, 1-meter, Passive 30AWG 21mm
GD-Q10-4S10-2M 40G QSFP+ to 4SFP+ Breakout DAC Cable, 2-meter, Passive 30AWG 21mm
GD-Q10-4S10-3M 40G QSFP+ to 4SFP+ Breakout DAC Cable, 3-meter, Passive 30AWG 21mm
GD-Q10-4S10-5M 40G QSFP+ to 4SFP+ Breakout DAC Cable, 5-meter, Passive 26AWG 26mm
GD-Q10-4S10-7M 40G QSFP+ to 4SFP+ Breakout DAC Cable, 7-meter, Passive 26AWG 30mm
Note Cable length could be customized to any length as required. please feel free to contact us




Parameter Symbol Min Typ Max Units Notes
Differential Impedance Zd 90 100 110 Ω  
Differential Input Return Loss SDDXX <-12+2* SQRT (f) with f in GHz dB 0.01~4.1GHz


Log10/(f/5.5) with f in GHz





Common Mode Output Return Loss



< -7+1.6*f with f in GHz dB 0.01~2.5GHz
    -3 dB 2.5~11.1GHz
Difference Waveform Distortion Penalty dWDPc     6.75 dB  
VMA Loss L     4.4 dB  
VMA Loss to Crosstalk Ratio VCR 32.5     dB  





All of Gigaopto's 40G QSFP+ to 4SFP+ Breakout DAC Cable DACs 50cm Length are open sourced,can be coded to be fully compatible with mainstream devices, please refer to the following form, for more products compatibility, please contact us.


Corresponding Compatible Brand/Part Number
Brand Part Number Brand Part Number
Gigaopto GD-Q10-4S10-0P5M Arista CAB-Q-S-0.5M
Dell 462-3638 Brocade 40G-QSFP-4SFP-C-0105
Extreme 10GB-4-C50-QSFP Mellanox MC2609130-050



Mechanical Specifications


40G Passive Direct Attach Cable DAC For Date Center / Fiber Channel 0




1.Can I have different compatibility for each end of the 40G QSFP+ to 4SFP+ Breakout Direct Attach Cables?

Yes, supported. we offer customized dual compatibility solutions for Direct Attach Copper Cables so that you can choose compatibility for each end separately. All you need is to list out the requested Compatible Brands.


2.What kind of support customers can get from Gigaopto on OEM/ODM?

As for customized direct attach cables, we offer usual customization options such as compatibility, cable length, cable color, operating temperature, label pattern, label colors, etc. Any inquiries for customization is welcome.

Contact Details

WhatsApp : +8615989585901