Lenovo
Lenovo 1M Passive QSFP28 to 4xSFP28 DAC 3.28 ft
A 3.28 ft passive direct-attach cable splits one QSFP28 port into four SFP28 connections
- CatQSFP28/SFP28
- Connector AQSFP28 Network
- Connector B4 x SFP28 Network
- Length3.28 ft
- 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.
Highlights
- 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
Specifications
| Brand | Lenovo |
|---|---|
| Cat | QSFP28/SFP28 |
| Connector A | QSFP28 Network |
| Connector B | 4 x SFP28 Network |
| Length | 3.28 ft |
| Features | Features:Passive |
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.
New to this? Which coin should you pay with — what to check, what it costs to pay, and what is never asked for.
Also in this aisle
People compared these
Same shelf, same checkout — eight coins and a 30-minute rate lock.
Black Box Corporation
Black Box Corporation CAT6 EZ-RJ45 Modular Plugs 100-Pack
$95.99
0.00114501BTC
In stock
