- Fiber Optic Cables
 - Fiber Optic Cable Accessories
 - Copper Cables
 - Copper Cable Accessories
 - High Density Data Center Wiring System
 - Intelligent Management Wiring System
 - Security Cables
 - Conference AV Cables
 - Cabinet and Accessories
 
- SFP+/QSFP+AOC Active Optical fiber Cable Assemblies
 - MPO pre-end modules
 - MPO high density optical fiber patch panels
 - MPO import adapters
 - MTP/MPO Loopback
 - MTP/MPO pre-terminated trunk optical cables
 - MTP/MPO pre-terminated branch optical cables
 - MTP/MPO pre-terminated fanned optical fibers
 - QSFP to SFP optical fiber cables
 - 40G QSFP+ optical fiber connect cables
 - CXP to SFP optical fiber cables
 - 100G CXP optical fiber connect cables
 - 40G QSFP+ optical fiber connect cables
 - IP68 waterproof MPO connector and patch cords
 - SFP+/QSFP+DAC Active Copper Cable Assemblies
 - MPO high density optical fiber distribution box adapter panels
 
25G SFP28 Direct Attach Cable (DAC) Datasheet
Brand Name:KOLORAPUS
Sample: Available
Unit price<=$15 ,free sample and need to pay the freight.
Unit price >$15,need to pay the double sample fee and freight.
MOQ: >=$7000
Origin: China
Certification:ISO/3C/CE/ROHS/UL
Package: Carton
Payment Method:T/T
General Description
SFP28 Direct Attach Cables are compliant with SFF-8432 and SFF-8402 specifications. Various choices of wire gauge are available from 30 to 26 AWG with various choices of cable length (up to 5m).
Features
•  Up to 25.78125 Gbps data rate
•  Up to 5 meter transmission
•  Hot-pluggable SFP 20PIN footprint
•  Improved Pluggable Form Factor(IPF)
compliant for enhanced EMI/EMC
performance
•  Compatible to SFP28 MSA
•  Compatible to SFF-8402 and SFF-8432
•  Temperature Range: 0~ 70 °C
•  RoHS Compatible
Benefits
• Cost-effective copper solution
• Lowest total system power solution
• Lowest total system EMI solution
• Optimized design for Signal Integrity
Applications
• 25G Ethernet
Product Description
• The SFP28 passive cable assemblies are high performance, cost effective I/O solutions for 25G Ethernet. SFP28 copper cables allow hardware manufactures to achieve high port density, configurability and utilization at a very low cost and reduced power budget.
High Speed Characteristics
Parameter  | Symbol  | Min  | Typical  | Max  | Unit  | Note  | 
Differential Impedance  | TDR  | 90  | 100  | 110  | Ώ  | |
Insertion loss  | SDD21  | -22.48  | dB  | At 12.8906 GHz  | ||
Differential Return Loss  | SDD11 SDD22  | See 1  | dB  | At 0.05 to 4.1 GHz  | ||
See 2  | dB  | At 4.1 to 19 GHz  | ||||
Common-mode to common-mode output return loss  | SCC11 SCC22  | -2  | dB  | At 0.2 to 19 GHz  | ||
Differential to common-mode return loss  | SCD11 SCD22  | See 3  | dB  | At 0.01 to 12.89 GHz  | ||
See 4  | At 12.89 to 19 GHz  | |||||
Differential to common Mode Conversion Loss  | SCD21-IL  | -10  | dB  | At 0.01 to 12.89 GHz  | ||
See 5  | At 12.89 to 15.7 GHz  | |||||
-6.3  | At 15.7 to 19 GHz  | |||||
Notes: 1. Reflection Coefficient given by equation SDD11(dB) < -16.5 + 2 × SQRT(f ), with f in GHz 2. Reflection Coefficient given by equation SDD11(dB) < -10.66 + 14 × log10(f/5.5), with f in GHz 3. Reflection Coefficient given by equation SCD11(dB) < -22 + (20/25.78)*f, with f in GHz 4. Reflection Coefficient given by equation SCD11(dB) < -15 + (6/25.78)*f, with f in GHz 5. Reflection Coefficient given by equation SCD21(dB) < -27 + (29/22)*f, with f in GHz 
  | ||||||
Pin Descriptions
SFP28 Pin Function Definition
Pin  | Logic  | Symbol  | Name/Description  | Notes  | ||
1  | VeeT  | Transmitter Ground  | ||||
2  | LV-TTL-O  | TX_Fault  | N/A  | 1  | ||
3  | LV-TTL-I  | TX_DIS  | Transmitter Disable  | 2  | ||
4  | LV-TTL-I/O  | SDA  | Tow Wire Serial Data  | |||
5  | LV-TTL-I  | SCL  | Tow Wire Serial Clock  | |||
6  | MOD_DEF0  | Module present, connect to VeeT  | ||||
7  | LV-TTL-I  | RS0  | N/A  | 1  | ||
8  | LV-TTL-O  | LOS  | LOS of Signal  | 2  | ||
9  | LV-TTL-I  | RS1  | N/A  | 1  | ||
10  | VeeR  | Reciever Ground  | ||||
11  | VeeR  | Reciever Ground  | ||||
12  | CML-O  | RD-  | Reciever Data Inverted  | |||
13  | CML-O  | RD+  | Reciever Data Non-Inverted  | |||
14  | VeeR  | Reciever Ground  | ||||
15  | VccR  | Reciever Supply 3.3V  | ||||
16  | VccT  | Transmitter Supply 3.3V  | ||||
17  | VeeT  | Transmitter Ground  | ||||
18  | CML-I  | TD+  | Transmitter Data Non-Inverted  | |||
19  | CML_I  | TD-  | Transmitter Data Inverted  | |||
20  | VeeT  | Transmitter Ground  | ||||
1.  | Signals not supported in SFP+ Copper pulled-downto VeeT with 30K ohms resistor  | |||||
2.  | Passive cable assemblies do not support  | LOS and TX_DIS  | ||||
 
Mechanical Specifications
The connector is compatible with the SFF-8432 specification.

Regulatory Compliance
Feature  | Test Method  | Performance  | 
Electrostatic Discharge (ESD) to the Electrical Pins  | 
 MIL-STD-883C Method 3015.7  | 
 Class 1(>2000 Volts)  | 
Electromagnetic Interference(EMI)  | FCC Class B  | Compliant with Standards  | 
CENELEC EN55022 Class B  | ||
CISPR22 ITE Class B  | ||
 RF Immunity(RFI)  | 
 IEC61000-4-3  | Typically Show no Measurable Effect from a 10V/m Field Swept from 80 to 1000MHz  | 
RoHS Compliance  | RoHS Directive 2011/65/EU and it's Amendment Directives (EU) 2015/863  | RoHS (EU)2015/863 compliant  | 
REACH Compliance  | REACH Regulation (EC) No 1907/2006  | REACH (EC) No 1907/2006 compliant  | 

















                                















