405-AAST: Dell HBA355i Front SAS 12Gb/s Host Bus Adapter
Also listed as: 0F4G8H, F4G8H · made by Broadcom
The Dell 405-AAST is a Dell HBA355i Front SAS 12Gb/s Host Bus Adapter providing 12Gb/s SAS, 6Gb/s SATA connectivity across Internal SlimSAS SFF-8654 connectors via PCIe 4.0 x8 for Dell R750, R650, R760, R660 servers.
Specifications
| Part number | 405-AAST |
|---|---|
| Brand | Dell |
| Made by | Broadcom |
| Type | HBAs |
| Other numbers | 0F4G8H, F4G8H |
| Status | current |
| Interface | PCIe 4.0 x8 |
| Form factor | Dedicated Front Chassis Mount |
| Ports | Internal SlimSAS SFF-8654 connectors |
| Speed | 12Gb/s SAS, 6Gb/s SATA |
| Tdp (W) | 10 |
About the 405-AAST
The Dell 405-AAST is a Dell HBA355i Front SAS 12Gb/s Host Bus Adapter delivering non-RAID SAS pass-through connectivity across Internal SlimSAS SFF-8654 connectors over PCIe 4.0 x8. Built with Broadcom SAS controller silicon on the 405-AAST, it provides direct target communication for software-defined storage, JBOD shelves, and tape automation. In Dell's storage ecosystem, 405-AAST enables high-throughput host-to-enclosure data pathways.
Compatibility
The 405-AAST installs into PCIe slots or dedicated storage bays on Dell PowerEdge servers including R750, R650, R760, R660. The 405-AAST connects to internal drive backplanes or external PowerVault enclosures over SAS cabling without RAID volume overhead, enabling software-defined storage stacks to manage drives directly.
How to identify a genuine unit
Authentic Dell 405-AAST SAS HBAs carry a serialized label displaying DP/N 0F4G8H, SAS controller branding, and Dell regulatory approvals. In iDRAC under Storage Controllers, the 405-AAST adapter identifies as an authentic Dell HBA with active firmware and device mapping.
Buying used
When sourcing a pre-owned 405-AAST, inspect the physical PCIe edge contacts and SAS connector ports for damaged pins. Verify that onboard passive heatsinks on the 405-AAST are firmly seated, and test in iDRAC to confirm that all connected drives enumerate in pass-through mode.
Fits these models
Equivalent part numbers
- Broadcom SAS3808 IT Broadcom SAS3808 8-port 12Gb/s SAS/SATA Tri-Mode IOC base
FAQ
Does the HBA355i support hardware RAID configurations?
No, it is a pure HBA (Host Bus Adapter) providing non-RAID pass-through; for hardware RAID, the PERC H755 is required.
Why is the Front form factor preferred?
It mounts on the drive cage directly behind the backplane, eliminating long internal cables and leaving all PCIe riser slots free.
Buying or selling 405-AAST?
New, refurbished or used. Tell us the quantity and condition and we connect you with a vetted reseller in your region, usually within one working day.
Sources
- Dell HBA355i Front User's Guide, checked 2026-10-27