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Lenovo passive QSFP28 to four SFP28 breakout cable, 3.28 ft

Lenovo

Lenovo 1M Passive QSFP28 to 4xSFP28 DAC 3.28 ft

SKU CH-3Q5B-CWQW2

A 3.28 ft passive direct-attach cable splits one QSFP28 port into four SFP28 connections

  • Cable categoryQSFP28/SFP28
  • First connectorQSFP28 Network
  • Second connector4 x SFP28 Network
  • Overall length3.28 ft (1 m)
  • Key featuresFeatures:Passive
  • QSFP28 to four SFP28 connectors simplify 4-channel breakout
  • Passive copper design needs no external power supply
  • 28 ft length fits standard rack-to-rack cabling
  • Lenovo branded for consistent manufacturing quality
  • Direct-attach cable reduces latency versus optical modules

Lenovo 1M Passive QSFP28 Breakout Cable

This Lenovo cable connects a single QSFP28 port to four separate SFP28 ports. It is built for network engineers who need to split a high-density uplink into multiple lower-speed links within a rack. The passive design requires no external power and adds minimal latency to the connection.

Suits direct-attach breakout links in dense racks

Installers who need active signal conditioning or longer reach than 3.28 ft should look at active optical alternatives. Builders requiring connectors other than QSFP28 or SFP28 will need a different cable assembly. This unit does not support conversion to other form factors or active equalisation.

Passive copper construction limits reach to 3.28 ft

The fixed length determines the maximum spacing between the host switch and the four target devices. No signal regeneration occurs inside the cable, so the link budget depends entirely on the connected ports. Verify that both ends support passive direct-attach operation at the intended data rate.

How it compares

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Price $81.99
Pricier than about 90% of the 9,945 comparable items (median $14.99).

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Specifications

Product
Brand nameLenovo
Connectivity
Cable categoryQSFP28/SFP28
Ports & slots
First connectorQSFP28 Network
Second connector4 x SFP28 Network
Size & build
Overall length3.28 ft (1 m)

Questions about this item

When should the passive QSFP28-to-4xSFP28 cable be replaced?

The passive copper assembly has no active parts, so replacement is only needed if the connectors are damaged or the cable sheath shows wear.

What limits throughput when the 3.28 ft link runs continuously?

The passive design supports the rated lane speed as long as the host ports stay within specification; no active equalisation is present to extend reach.

How much heat does the 1 m passive DAC add to the rack during all-day operation?

With no onboard electronics the cable adds negligible heat; only the connected transceivers generate measurable warmth.

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