25G SFP28 Direct Attach Cable Passive High Speed Low Insertion Loss

Basic Information
Place of Origin: Shenzhen, China
Brand Name: Gigaopto
Certification: CE, FCC, ROHS, ISO9001, ISO14000, MSDS, REACH, CP65, TUV, UL
Model Number: GD-SFP28-0P5M
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: 100,000pcs/month
Detail Information
Product: 25G SFP28 DAC Cable: Passive Twinax Copper
Wire Gauge: 30AWG/16AWG Warranty: 3-year
Data Rata: 25Gbps Length: 0.5M-5M
Keywords: Direct Attach Copper Twinax Cable
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SFP28 Direct Attach Cable


25G Direct Attach Cable



Product Description

Hot-pluggable SFP28 25GBASE Passive Direct Attach Copper Twinax Copper Cable Low insertion loss



Applications of 25G SFP28 Direct Attach Cable

  • High performance computing
  • Low EMI radiation Switches, servers and routers
  • Telecommunication and wireless infrastructure
  • Medical diagnostics and networking
  • Test and measurement equipment
  • Data Center networks
  • Storage area networks




This high speed,cost-effective Direct Attach Cables are designed for use in 25Gigabit Ethernet links.

They are electrically compliant with the SFF-8431, and the mechanical SFP28 plug is compatible with SFF-8432.

SFP28 Copper twinax cables are suitable for very short distances and offer a highly cost-effective way to connect within racks and across adjacent racks .

Gigaopto offers passive SFP28 twinax cables in lengths of 0.5~3meters by 30AWG and 4~5meters by 26AWG.

Each SFP28 connector comprises an EEPROM providing product information which can be read by the host system.

Every SFP28 Passive Direct Attach Copper Cable has been programmed, uniquely serialized, and data-traffic and application tested to ensure it is 100% compliant and functional.



Functional Specification


Product Name SFP28 DAC Max Data Rate 25.78125Gbps
Passive or Active Passive Cable Length 0.5-Meter to 5-Meter
Connector Type SFP28 to SFP28 Cable impedance 100 Ω ( typ.)
Minimum Bend Radius 35mm Wire Gauge 26/30AWG
Cable type Twinax Copper Power supply 3.3V
Jacket Material PVC (OFNR) Operating Temperature 0 to 70°C (32 to 158°F)
Power Consumption ≤0.1W OEM/ODM Supported
Digital Diagnostic Monitoring N/A Warranty 3-Year
Protocols IEEE 802.3, SFP28 MSA, SFF-8402, Infiniband, EIA 364-1000
Application 25G Ethernet, Data Center, 5G Wireless



Ordering Information


Part Number Description Wire Gauge Minimum Bend Radius
GD-SFP28-0P5M 25G SFP28 to SFP28 DAC Cable 0.5-meter, Passive, 30AWG 25mm
GD-SFP28-1M 25G SFP28 to SFP28 DAC Cable 1-meter, Passive, 30AWG 25mm
GD-SFP28-1P5M 25G SFP28 to SFP28 DAC Cable 1.5-meter, Passive, 30AWG 25mm
GD-SFP28-2M 25G SFP28 to SFP28 DAC Cable 2-meter, Passive, 30AWG 25mm
GD-SFP28-2P5M 25G SFP28 to SFP28 DAC Cable 2.5-meter, Passive, 30AWG 25mm
GD-SFP28-3M 25G SFP28 to SFP28 DAC Cable 3-meter, Passive, 30AWG 25mm
GD-SFP28-4M 25G SFP28 to SFP28 DAC Cable 4-meter, Passive, 26AWG 30mm
GD-SFP28-5M 25G SFP28 to SFP28 DAC Cable 5-meter, Passive, 26AWG 30mm
Note Cable length could be customized to any length as required. Please feel free to contact us.


Electrical Characteristics


Parameter Symbol Unit Min Typ Max Notes
Supply Voltage VCC V 3.14   3.46  
Supply Current ICC A     0.31  
Power Consumption Pc W     1  
Signaling rate per lane   Gbps   25.78125    
Input Differential Impedance RIN Ω   100    
Differential data input swing VIN mVp-p 180   700  
Transmit Disable Voltage VD V 2   Vcc  
Transmit Enable Voltage VEN V Vee   Vee+ 0.8  
Differential data output swing VOUT mVp-p 300   850  
Data output rise time, fall time tr ps     28  
LOS Fault VLOS fault V 2   VccHOST  
LOS Normal VLOS normal V Vee   Vee+0.8  
Power Supply Noise Tolerance VccT/VccR mVpp Per SFF-8431 Rev 4.1  
IIC communication
IIC Clock frequency - KHZ 100   400  





Each Gigaopto’s optical transceiver/AOC/DAC is tested in the host device to verify interoperability, and we promise 100% full compatibility on the specified device with a 3-year warranty. For this 25G SFP28 to SFP28 DAC Cables, please refer to the P/N correspondence table ( for example in 1-Meter length). If you are interested in knowing more compatibility, you are always welcome to contact us.


Corresponding Compatible Brand/Part Number
Brand Part Number Brand Part Number
Gigaopto GD-SFP28-1M Arista CAB-S-S-25G-1M
Cisco SFP-H25G-CU1M Juniper JNP-SFP-25G-DAC-1M
Dell 470-ACEX Mellanox MCP2M00-A001





1.Can I have different compatibility for each end of the 25G SFP28 to SFP28 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