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5m (16ft) Chelsio QSFP-4SFP25G-CU5M Compatible 100G QSFP28 to 4 x 25G SFP28 Ethernet Passive Direct Attach Copper Breakout Cable
5m (16ft) Chelsio QSFP-4SFP25G-CU5M Compatible 100G QSFP28 to 4 x 25G SFP28 Ethernet Passive Direct Attach Copper Breakout Cable
5m (16ft) Chelsio QSFP-4SFP25G-CU5M Compatible 100G QSFP28 to 4 x 25G SFP28 Ethernet Passive Direct Attach Copper Breakout Cable
P/N: Q100-4S25-C5
$76.50
6
Solds
4
Reviews
2
Questions
safeguard
4-Year Warranty
30-Day Returns
30-Day Exchange
（1 In Stock）

Product Highlights

Max. Power Consumption 0.125W
Tested in Targeted Switches for Superior Performance
Minimum Bend Radius 60mm for Flexible Routing
Supports 100G to 4x 25G Ethernet Interoperability
Simplifies Patching and Offers Cost-effective Short Links
Hot Pluggable Cable Compliant with QSFP28/SFP28 MSA
Low Insertion Loss and Ultra-low Crosstalk
See more
Specifications
Certification
Connectivity Solutions
Comparison Table
Q&A
Reviews
Resources
5m (16ft) Chelsio QSFP-4SFP25G-CU5M Compatible 100G QSFP28 to 4 x 25G SFP28 Ethernet Passive Direct Attach Copper Breakout Cable
The 100G QSFP28 to 4x 25G SFP28 Direct Attach Cable utilizes passive copper technology, ensuring reliable connectivity without the need for additional power. This cable provides a cost-effective solution for interconnecting equipment within a close range, such as telecom operator equipment rooms or data centers. It offers a seamless connection between a 100G QSFP28 port and four 25G SFP28 ports, meeting the requirements of industry standards IEEE 802.3bj, SFF-8402, and SFF-8665.
Specifications
Connector Type
QSFP28 to 4x SFP28
Data Rate
103.125Gbps to 4x 25.78125Gbps
Media
Copper
Cable Type
DAC
Cable Length
1m~5m(3ft~16ft)
Outer Diameter
1m~3m@AWG 30 4m~5m@AWG 26
Jacket Material
PVC
Minimum Bend Radius
23mm@AWG 30 33mm@AWG 26
Power Consumption
≤0.1W
Case Operating Temperature
0 to 70°C (32 to 158°F)
Protocol
4x 25G Breakout Ethernet
Application
Swicth to Switch Switch to NIC Router to NIC Other Links
Certification
Product
Product
Product
Product
Product
Product
Product
Product
Product
Product
Connectivity Solutions
Chelsio NIC to Switch links：100G QSFP28 to 4x 25G SFP28
All
Chelsio NIC to Switch links：100G QSFP28 to 4x 25G SFP28
Comparison Table
Cisco Compatible 100G QSFP28 Passive DAC, 1m (3ft)
Q100-Q100-C1
Cisco Compatible 100G QSFP28 AOC, 1m (3ft)
Q100-Q100-A1
Cisco Compatible 100G QSFP28 to 4x25G SFP28 Passive Breakout DAC, 1m (3ft)
Q100-4S25-C1
Cisco Compatible 100G QSFP28 to 4x25G SFP28 AOC, 1m (3ft)
Q100-4S25-A1
Connector Type QSFP28 to QSFP28QSFP28 to QSFP28QSFP28 to 4x SFP28QSFP28 to 4x SFP28
Data Rate 103.125Gbps to 103.125Gbps103.125Gbps to 103.125Gbps103.125Gbps to 4x 25.78125Gbps103.125Gbps to 4x 25.78125Gbps
Media CopperFiberCopperFiber
Cable Type DACAOCDACAOC
Cable Length 0.5m~5m(2ft~16ft)1m~100m(3ft~328ft)1m~5m(3ft~16ft)1m~50m(3ft~165ft)
Outer Diameter 0.5m~3m@AWG 30 4m~5m@AWG 263.0mm1m~3m@AWG 30 4m~5m@AWG 263.0mm
Jacket Material PVCOFNPPVCOFNP
Minimum Bend Radius 23mm@AWG 30 33mm@AWG 2630mm23mm@AWG 30 33mm@AWG 2630mm
Power Consumption ≤0.1W≤2.2W≤0.1W≤2.2W@QSFP28 ≤1.0W@SFP28
Case Operating Temperature 0 to 70°C (32 to 158°F)0 to 70°C (32 to 158°F)0 to 70°C (32 to 158°F)0 to 70°C (32 to 158°F)
Protocol 100 Gigabit Ethernet 100G Infiniband EDR100 Gigabit Ethernet 100G Infiniband EDR4x 25G Breakout Ethernet4x 25G Breakout Ethernet
Application Swicth to Switch Switch to NIC Router to NIC Other LinksSwicth to Switch Switch to NIC Router to NIC Other Optical LinksSwicth to Switch Switch to NIC Router to NIC Other LinksSwicth to Switch Switch to NIC Router to NIC Other Optical Links
Connector Type
Data Rate
Media
Cable Type
Cable Length
Outer Diameter
Jacket Material
Minimum Bend Radius
Power Consumption
Case Operating Temperature
Protocol
Application
Cisco Compatible 100G QSFP28 Passive DAC, 1m (3ft)
Q100-Q100-C1
Cisco Compatible 100G QSFP28 AOC, 1m (3ft)
Q100-Q100-A1
Cisco Compatible 100G QSFP28 to 4x25G SFP28 Passive Breakout DAC, 1m (3ft)
Q100-4S25-C1
Cisco Compatible 100G QSFP28 to 4x25G SFP28 AOC, 1m (3ft)
Q100-4S25-A1
QSFP28 to QSFP28
QSFP28 to QSFP28
QSFP28 to 4x SFP28
QSFP28 to 4x SFP28
103.125Gbps to 103.125Gbps
103.125Gbps to 103.125Gbps
103.125Gbps to 4x 25.78125Gbps
103.125Gbps to 4x 25.78125Gbps
Copper
Fiber
Copper
Fiber
DAC
AOC
DAC
AOC
0.5m~5m(2ft~16ft)
1m~100m(3ft~328ft)
1m~5m(3ft~16ft)
1m~50m(3ft~165ft)
0.5m~3m@AWG 30 4m~5m@AWG 26
3.0mm
1m~3m@AWG 30 4m~5m@AWG 26
3.0mm
PVC
OFNP
PVC
OFNP
23mm@AWG 30 33mm@AWG 26
30mm
23mm@AWG 30 33mm@AWG 26
30mm
≤0.1W
≤2.2W
≤0.1W
≤2.2W@QSFP28 ≤1.0W@SFP28
0 to 70°C (32 to 158°F)
0 to 70°C (32 to 158°F)
0 to 70°C (32 to 158°F)
0 to 70°C (32 to 158°F)
100 Gigabit Ethernet 100G Infiniband EDR
100 Gigabit Ethernet 100G Infiniband EDR
4x 25G Breakout Ethernet
4x 25G Breakout Ethernet
Swicth to Switch Switch to NIC Router to NIC Other Links
Swicth to Switch Switch to NIC Router to NIC Other Optical Links
Swicth to Switch Switch to NIC Router to NIC Other Links
Swicth to Switch Switch to NIC Router to NIC Other Optical Links
Questions & Answers
edit icon Ask a question
All (2) Compatibility (1)Installation (1)
Q:

How should cables be routed in a high-density rack?

by Q***m on 2025-11-05 16:38:52

A:

Use cable managers to maintain airflow and prevent bending.

by AICPLIGHT on 2025-11-05 23:37:02

like icon Helpful 0
comment icon Comment 0
Q:

How should cables be routed in a high-density rack?

by w***m on 2025-09-30 16:43:55

A:

Yes, backward compatibility is supported in many cases.

by AICPLIGHT on 2025-09-30 17:43:09

like icon Helpful 0
comment icon Comment 0
Customer Reviews
edit icon Write a review
All (4) Compatibility (1)Ease of Use (2)Value (1)
w
w***m
2025-11-26 23:03:07
Confirmed Purchase
5.0

Plug-and-play experience was excellent. The cables came clean and ready for immediate deployment.

link icon Helpful 0
comment icon Comment 0
m
m***m
2025-11-18 11:45:31
Confirmed Purchase
5.0

High-quality interconnects at a fraction of the price of branded cables. Ideal for scaling AI clusters on a budget.

link icon Helpful 0
comment icon Comment 0
t
t***m
2025-10-15 17:01:20
Confirmed Purchase
5.0

Fully compatible with our NVIDIA ConnectX-6 NICs and Mellanox switches. No firmware warnings or handshake delays.

link icon Helpful 0
comment icon Comment 0
Y
Y***m
2025-09-23 23:24:32
Confirmed Purchase
5.0

Pre-labeled and pre-tested AOCs made our rack wiring painless. They’re flexible enough for tight bends and clearly marked on each end.

link icon Helpful 0
comment icon Comment 0
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