R0M47A - Aruba 50G SFP56 to SFP56 3m DAC Cable

HPE Aruba R0M47A — 50G SFP56 to SFP56 3 m Direct Attach Copper (DAC) Cable

What it is

R0M47A is an HPE Aruba 50 Gigabit direct attach copper (DAC) cable terminated with SFP56-compatible connectors.
It provides a 3 meter pre-terminated copper link between two SFP56 ports — typically used to connect switches, routers, servers, or storage with 50 GbE interfaces over very short distances without separate optics.

Why buyers pick R0M47A (plain English)

Plug-and-play simplicity
Pre-terminated SFP56 plugs mean you don’t need separate transceivers — just insert the cable into the SFP56 ports on both ends.

Low cost, low latency
DAC cables are more cost-effective than optics plus fiber for short links and deliver very low latency and predictable performance.

Perfect for short distances
At 3 m, it’s ideal for top-of-rack to server, switch-to-switch, or adjacent rack interconnects where fiber isn’t required.

Energy-efficient copper
No optical components means lower power draw than active optics — good for energy-sensitive deployments.

Enterprise-validated DAC
Designed for Aruba and other SFP56-capable devices, offering reliable 50 GbE connectivity in short-reach environments.

60-second spec box (R0M47A)

Cable type
Direct Attach Copper (DAC)

Length
3 meters

Connector
SFP56-to-SFP56

Speed
50 GbE

Media
Copper passive

Use case
Short-reach 50 GbE connections between switches, servers, and storage.

Where it fits (and when to choose something else)

Perfect for:

• Top-of-rack to server connections in the same rack

• Adjacent rack or short-distance switch interconnects at 50 GbE

• Low-latency, cost-effective 50 GbE infrastructure links

• Environments where fiber optics are not needed or cost-prohibitive

Choose something else if:

• You need longer reach → 50 GbE fiber optics (OSFP/SFP56 optics + fiber)

• You want multimode or single-mode fiber options → SR/LR optics + fiber

• You need 100 GbE or higher speeds → appropriate cables/optics

TL;DR

R0M47A is Aruba’s 3 m 50 GbE SFP56-to-SFP56 DAC cable:
a simple, low-latency, cost-efficient copper link for short-reach 50 GbE connectivity between networking devices in racks and edge deployments.