Cisco QSFP‑4SFP25G‑CU3M Full English Product Description

Cisco QSFP‑4SFP25G‑CU3M is an original Cisco passive breakout twinax copper direct‑attach cable with a fixed length of 3 meters. One end terminates with a QSFP28 connector, and the fan‑out side provides four independent SFP28 connectors. Compliant with QSFP28 MSA SFF‑8665, SFP28 MSA SFF‑8402 and IEEE 802.3bj standards, it delivers cost‑effective zero‑power interconnection solution for short‑to‑medium‑range intra‑rack and adjacent cross‑rack links in enterprise, cloud, AI and high‑performance computing data centers, converting one 100G QSFP28 port into four separate 25G SFP28 ports.

100G Aggregated / 4×25G Full‑Duplex Electrical Transmission

Supports 100GBASE‑CR4 aggregated bandwidth, breaking out into four independent 25GBASE‑CU channels. Ideal for 100G‑to‑4×25G port expansion for leaf‑spine fabrics, switch‑to‑switch and switch‑to‑server interconnections.
Passive Zero‑Power Copper Architecture

No internal signal‑amplifier chips. Operates at zero power consumption, reduces data‑center power budget and thermal load, ensures stable signal integrity for short‑to‑medium‑reach 100G/25G high‑speed transmission.
Ultra‑Low‑Latency Interconnection

Twinax copper direct‑attach design provides minimal signal latency compared with active optical cables, suitable for low‑latency data‑center, virtualization and AI‑cluster environments.
Hot‑Swappable QSFP28 and SFP28 Interfaces

Standard hot‑pluggable QSFP28 host connector and four SFP28 fan‑out connectors. Technicians can insert or remove the cable without powering down connected Cisco switches, routers and servers.
Multi‑Layer Shielded Twinax Construction

High‑quality multi‑layer shielded twinax copper cable suppresses EMI and RFI electromagnetic interference, lowers crosstalk risk under high‑density rack deployment conditions.
Standard Pull‑Tab Latch Design

Equipped with pull‑tab latches on QSFP28 and each SFP28 connector for convenient insertion and extraction from network hardware ports.

Technical Specifications

Part Number: QSFP‑4SFP25G‑CU3M
Cable Length: 3 m (9.84 ft)
Cable Type: Passive Shielded Twinax Copper Breakout Assembly
Interface: One QSFP28 to Four SFP28
Data Rate: Aggregate 100 Gbps (4 × 25 Gbps full‑duplex per channel)
Standards Compliance: SFF‑8665, SFF‑8402, IEEE 802.3bj
Typical Power Consumption: 0 W (Passive)
Commercial Operating Temperature: 0°C ~ 70°C
Storage Temperature: ‑40°C ~ 85°C
Outer Jacket: Black PVC
Environmental Compliance: RoHS‑6 Lead‑Free

Cisco switches and routers equipped with QSFP28 100G ports supporting breakout function, including Cisco Nexus series, Catalyst 9000X series data‑center switches, aggregation switches, and other third‑party network devices complying with QSFP28 / SFP28 MSA specifications supporting passive breakout direct‑attach copper cablesCisco.

Application Scenarios

Designed for short‑to‑medium‑distance intra‑rack and adjacent cross‑rack interconnections in cloud data centers, enterprise data centers, AI and HPC environments. Typical use cases include 100G‑to‑4×25G port expansion, leaf‑spine switch interconnections, switch‑to‑server links and short‑to‑medium‑reach Storage Area Network (SAN) connections, where zero‑power, low‑latency and cost‑effective copper breakout interconnection is preferred.

Short Version (For Invoice / E‑commerce Listing)

Cisco QSFP‑4SFP25G‑CU3M, 3M QSFP28 to 4×SFP28 Passive Breakout Twinax Copper Cable, aggregate 100Gbps (4×25Gbps), zero power consumption, ultra‑low latency, MSA compliant, original Cisco breakout DAC cable for short‑to‑medium‑range data‑center port expansion interconnections.

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Cisco QSFP‑4SFP25G‑CU3M Full English Product Description

Product Overview

Key Features

Technical Specifications

Compatible Hardware

Application Scenarios

Short Version (For Invoice / E‑commerce Listing)


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