WD Ultrastar HC555 20 TB 3.5 Inch SAS 12Gb/s Enterprise HDD 0B47749
Brand: Western Digital | Category: Enterprise HDDs
SKU: 0B47749 | Part #: 0B47749 | MPN: WUH722020CL5204
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About the WD Ultrastar HC555 20 TB 3.5 Inch SAS 12Gb/s Enterprise HDD 0B47749
The WD Ultrastar HC555 20 TB 3.5 Inch SAS 12Gb/s Enterprise HDD 0B47749 from Western Digital is enterprise-grade Enterprise HDDs hardware built for data centers. It features 20 TB capacity, 3.5" form factor, SAS 12Gb/s interface, 7,200 RPM speed. The WD Ultrastar HC555 is a 20 TB 3.5-inch enterprise hard disk drive built on Western Digital's ninth-generation HelioSeal helium-sealed platform. Formatted with a 512e/4Kn sector configuration and featuring an OptiNAND architecture that integrates a companion iNAND flash storage device with the rotating media controller, the HC555 achieves enhanced rotational vibration tolerance and greater areal density. The drive spins at 7200 RPM and connects via a SAS 12Gb/s dual-port i Available in brand new condition. Western Digital enterprise hdds products are trusted by enterprises and data centers worldwide. Available from Omnixon Global. Contact our sales team to request a quote.
Technical Specifications
| Brand | Western Digital |
| Category | Enterprise HDDs |
| SKU | 0B47749 |
| Part Number | 0B47749 |
| MPN | WUH722020CL5204 |
| Condition | New |
| Capacity | 20 TB |
| Form Factor | 3.5" |
| Interface | SAS 12Gb/s |
| Speed | 7,200 RPM |
| Manufacturer Part Number | 0B47749 |
| Series | Ultrastar HC555 |
| Form Factor | 3.5 inch |
| Capacity | 20 TB |
| Interface | SAS 12Gb/s |
| Interface Ports | Dual port |
| Rotational Speed | 7200 RPM |
| Cache Buffer | 512 MB |
| Max Sustained Transfer Rate | 269 MB/s |
| Logical Sector Size | 512e / 4Kn |
| Rated Workload | 550 TB/year |
| MTBF | 2,500,000 hours |
| Annualized Failure Rate (AFR) | 0.35% |
| Operating Temperature | 5°C to 60°C |
| Power – Operating (Typical) | 7.8 W |
| Power – Idle | 5.0 W |
| Enclosure | Helium-sealed (HelioSeal) |
| Data Integrity | T10 Protection Information (PI) |
| Encryption | Self-Encrypting Drive (SED) option available |
| Dimensions (H x W x D) | 26.1 mm x 101.6 mm x 147 mm |
| Weight | 650 g (approximate) |
Frequently Asked Questions about WD Ultrastar HC555 20 TB 3.5 Inch SAS 12Gb/s Enterprise HDD 0B47749
What does the WD Ultrastar HC555 20 TB 3.5 Inch SAS 12Gb/s Enterprise HDD do?
At 20 TB, the WD Ultrastar HC555 20 TB 3.5 Inch SAS 12Gb/s Enterprise HDD suits enterprise data-center storage tiers — all-flash arrays, hyperconverged storage pools (vSAN, Ceph), database backends, and high-throughput backup repositories. The SAS 12Gb/s interface is supported by major server platforms.
What are the headline specs of the WD Ultrastar HC555 20 TB 3.5 Inch SAS 12Gb/s Enterprise HDD?
Key specifications for the WD Ultrastar HC555 20 TB 3.5 Inch SAS 12Gb/s Enterprise HDD: capacity 20 TB; form factor 3.5 Inch; interface SAS 12Gb/s; 5 Years support; new condition; model WUH722020CL5204; part number 0B47749; capacity 20 TB; interface SAS 12Gb/s; form factor 3.5 Inch; random write iops 550 TBW. Manufacturer part number 0B47749. For the full datasheet with electrical, environmental, and compliance details, contact our pre-sales engineering team.
Is the WD Ultrastar HC555 20 TB 3.5 Inch SAS 12Gb/s Enterprise HDD compatible with my infrastructure?
The WD Ultrastar HC555 20 TB 3.5 Inch SAS 12Gb/s Enterprise HDD uses a SAS 12Gb/s interface in a 3.5 Inch form factor. It's compatible with server platforms that expose this interface — typical deployments include Dell PowerEdge, HPE ProLiant, Lenovo ThinkSystem, and Supermicro SuperServer chassis. For specific vendor part-number compatibility, our team validates against the manufacturer support matrix.