£ 517.95 | £ 621.54 inc VAT
ATTO ExpressSAS H240N
ATTO ExpressSAS H240N
24-Port Internal 24Gb SAS/SATA PCIe 4.0 x8 HBA With 3 x SFF-8654
The ATTO ExpressSAS H240N is a high-density 24-port internal 24Gb SAS/SATA host bus adapter for servers and workstations requiring a large number of direct-attached storage connections.
Three x8 SlimSAS SFF-8654 internal connectors provide 24 SAS PHYs through a PCIe 4.0 x8 host interface.
- 24 internal SAS/SATA ports via 3 x8 SlimSAS SFF-8654 connectors.
- PCIe 4.0 x8 host interface; backward compatible with PCIe 3.0.
- 24Gb, 12Gb and 6Gb SAS plus 6Gb SATA target support.
- ATTO360 Storage management and PowerCenter Pro RAID 0, 1, 1e and 10 support.
Category: SAS/SATA HBA PCIe Cards
Brand: ATTO Technology
£ 1,088.95 | £ 1,306.74 inc VAT
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ATTO ExpressSAS H240N – Product Overview
High-Density 24Gb Internal SAS
The ExpressSAS H240N provides 24 internal SAS/SATA ports through three x8 SlimSAS SFF-8654 connectors, giving dense direct-attached connectivity for large server storage configurations.
PCIe 4.0 x8 Host Interface
The low-profile adapter uses an x8 PCIe 4.0 host interface and remains backward compatible with PCIe 3.0 systems.
Broad SAS And SATA Support
The H240N automatically negotiates 24Gb, 12Gb and 6Gb SAS targets and supports 6Gb SATA targets. SSP, STP, SMP, SAT, dual-port SAS and 512e/4Kn advanced-format media are supported.
Management And Data Protection
ATTO360 Storage supplies central configuration, monitoring and diagnostics. ATTO PowerCenter Pro software RAID 0, 1, 1e and 10 is included for supported internal-storage deployments, alongside event logging and cable-management features.
ATTO ExpressSAS H240N – Key Features
- 24 internal SAS/SATA ports.
- 3 x8 SlimSAS SFF-8654 internal connectors.
- PCIe 4.0 x8 host interface with PCIe 3.0 backward compatibility.
- 24Gb, 12Gb and 6Gb SAS target support.
- 6Gb SATA target support.
- Low-profile PCIe form factor.
- ATTO360 Storage management and configuration.
- PowerCenter Pro RAID 0, 1, 1e and 10 support.
- Supports SSP, STP, SMP, SAT and direct-attached SATA protocols.
- T10-DIF/PI and 512e/4Kn advanced-format media support.
- Maximum power consumption: 22W.
- Recommended minimum airflow: 150 LFM.
- Three-year standard warranty.
ATTO ExpressSAS H240N – Technical Specifications
| Model | ATTO ExpressSAS H240N |
| SKU | ESAH-240N-000 |
| Port Configuration | 24 internal SAS/SATA ports |
| Connectors | 3 x8 SlimSAS SFF-8654 internal |
| SAS Data Rates | 24Gb/s, 12Gb/s and 6Gb/s |
| SATA Data Rate | 6Gb/s |
| Host Interface | PCIe 4.0 x8; backward compatible with PCIe 3.0 |
| Form Factor | Low profile; full-height and low-profile connection brackets supported |
| Protocols | SSP, STP, SMP, SAT, direct-attached SATA |
| RAID | ATTO PowerCenter Pro RAID 0, 1, 1e and 10 |
| Management | ATTO360 Storage GUI; scriptable CLI; CSMI and IOCTL management APIs |
| Boot Support | UEFI 2.3.1 with HII support |
| Maximum Power | 22W |
| Recommended Airflow | 150 LFM minimum |
| Operating Temperature | 0°C to 55°C |
| Operating Humidity | 10% to 90% non-condensing |
| Storage Temperature | -40°C to 70°C |
| Storage Humidity | 5% to 95% non-condensing |
| Dimensions | 6.600 x 2.713 in |
| Operating Systems | Windows / Windows Server, macOS, SLES, RHEL, Rocky Linux, Ubuntu, VMware ESXi, FreeBSD, illumos |
| Warranty | 3 years |
ATTO ExpressSAS H240N Product Downloads
ATTO Technology Delivery Information
Generally, next working day delivery services (UK Mainland) are available on standard ATTO Technology Delivery orders placed before 2 pm (subject to stock availability).
Non-timed deliveries should be delivered between 9 am and 6 pm.
Orders placed after 2 pm on Fridays and weekends will be processed as normal the following Monday.
Orders placed on Bank Holidays will be processed the next working day.
If urgent, please call one of our helpful account managers so they may double check everything for you, enabling you to place your order with confidence.
Please note: these product details are for guide purposes only, and may contain errors.
We always recommend double-checking the product specs and features on the manufacturer website, or contact us if unsure before ordering.


