Cisco QSFP‑4SFP10G‑CU50CM Full English Product Description

Cisco QSFP‑4SFP10G‑CU50CM is an original Cisco passive breakout direct‑attach twinax copper cable with a fixed length of 0.5 meter. One end terminates with a QSFP+ connector, and the fan‑out side provides four independent SFP+ connectors. Compliant with QSFP+ MSA SFF‑8436, SFP+ MSA SFF‑8431 and IEEE 802.3ba standards, it delivers cost‑effective zero‑power interconnection solution for ultra‑short‑range intra‑rack links in enterprise, cloud and high‑performance computing data centers, converting one 40G QSFP+ port into four separate 10G SFP+ ports.

40G Aggregated / 4×10G Full‑Duplex Electrical Transmission

Supports 40GBASE‑CR4 aggregated bandwidth, breaking out into four independent 10GBASE‑CU channels. Ideal for 40G‑to‑4×10G 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 ultra‑short‑reach 40G/10G 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 and virtualization environments.
Hot‑Swappable QSFP+ and SFP+ Interfaces

Standard hot‑pluggable QSFP+ host connector and four SFP+ 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 QSFP+ and each SFP+ connector for convenient insertion and extraction from network hardware ports.

Technical Specifications

Part Number: QSFP‑4SFP10G‑CU50CM
Cable Length: 0.5 m (1.64 ft)
Cable Type: Passive Shielded Twinax Copper Breakout Assembly
Interface: One QSFP+ to Four SFP+
Data Rate: Aggregate 40 Gbps (4 × 10 Gbps full‑duplex per channel)
Standards Compliance: SFF‑8436, SFF‑8431, IEEE 802.3ba
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 QSFP+ 40G ports supporting breakout function, including data‑center switches, aggregation switches, and other third‑party network devices complying with QSFP+ / SFP+ MSA specifications supporting passive breakout direct‑attach copper cables.

Application Scenarios

Designed for ultra‑short‑distance intra‑rack interconnections in cloud data centers, enterprise data centers and HPC environments. Typical use cases include 40G‑to‑4×10G port expansion, leaf‑spine switch interconnections, switch‑to‑server links and short‑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‑4SFP10G‑CU50CM, 0.5M QSFP+ to 4×SFP+ Passive Breakout Twinax Copper Cable, aggregate 40Gbps (4×10Gbps), zero power consumption, ultra‑low latency, MSA compliant, original Cisco breakout DAC cable for ultra‑short‑range data‑center port expansion interconnections.

Links： Kino Technology Ltd |
Kino Technology Limited 网站技术支持：未来互联

Cisco QSFP‑4SFP10G‑CU50CM Full English Product Description

Product Overview

Key Features

Technical Specifications

Compatible Hardware

Application Scenarios

Short Version (For Invoice / E‑commerce Listing)


	© 2026 Kino Technology Limited. All Rights Reserved. \| Hong Kong Registered · Shenzhen Operation \| Original Brand New & Original Brand Used Network Communication Equipment Supplier