WD Ultrastar HC555 18 TB 3.5 Inch SATA 6Gb/s Enterprise HDD
Brand: Western Digital | Category: Enterprise HDDs
SKU: 0B48723 | Part #: 0B48723 | MPN: WUH722018CLE6L4
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About the WD Ultrastar HC555 18 TB 3.5 Inch SATA 6Gb/s Enterprise HDD
The 18 TB capacity and 7200 RPM rotational speed position the WD Ultrastar HC555 as a high-density, performance-tier enterprise storage solution for data centers requiring sustained throughput and large aggregate capacity in a compact footprint. Manufactured by Western Digital under part number WUH722018CLE6L4, this 3.5-inch SATA 6Gb/s drive combines HelioSeal helium-filled multi-disk technology with robust enterprise-grade reliability metrics, making it an ideal choice for storage architects and IT procurement teams building next-generation data center infrastructure.
The Ultrastar HC555 delivers exceptional reliability with a 2,500,000-hour mean time between failures (MTBF) and an annual failure rate of just 0.35%, backed by a 550 TB/year workload rating that supports continuous, mission-critical operations. Its 512 MB cache buffer and high areal density architecture optimize I/O performance across large-scale RAID deployments. Power efficiency remains competitive with 7.4 W during active read/write operations and 5.0 W in idle mode, helping reduce total cost of ownership in power-constrained environments. The drive meets international standards with RoHS compliance and operates reliably across the full 0°C to 60°C temperature range. Built to survive the rigors of data center installation and operation, it withstands 70 G operating shock and 250 G non-operating shock loads. At 650 grams and measuring 147.0 mm × 101.6 mm × 26.1 mm, the WD Ultrastar HC555 maintains the industry-standard 3.5-inch form factor for seamless integration into existing infrastructure. Contact Omnixon Global to request an RFQ for the WD Ultrastar HC555 18 TB enterprise HDD (part number WUH722018CLE6L4) and discover competitive pricing tailored to your organization's storage requirements.
Key Specifications
- Formatted Capacity: 18 TB
- Form Factor: 3.5 Inch
- Interface: SATA 6Gb/s
- Rotational Speed: 7200 RPM
- Cache Buffer: 512 MB
- MTBF: 2,500,000 hours
- Annual Failure Rate: 0.35%
- Workload Rating: 550 TB/year
Technical Specifications
| Brand | Western Digital |
| Category | Enterprise HDDs |
| SKU | 0B48723 |
| Part Number | 0B48723 |
| MPN | WUH722018CLE6L4 |
| Condition | New |
| Capacity | 18 TB |
| Form Factor | 3.5" |
| Interface | SATA 6Gb/s |
| Speed | 7,200 RPM |
| Manufacturer Part Number | 0B48723 |
| Series | Ultrastar HC555 |
| Formatted Capacity | 18 TB |
| Form Factor | 3.5 Inch |
| Interface | SATA 6Gb/s |
| Rotational Speed | 7200 RPM |
| Cache (Buffer) | 512 MB |
| Areal Density | High — HelioSeal multi-disk helium platform |
| Workload Rating | 550 TB/year |
| MTBF | 2,500,000 hours |
| Annual Failure Rate (AFR) | 0.35% |
| Operating Power (Read/Write) | 7.4 W |
| Idle Power | 5.0 W |
| Operating Shock | 70 G (2 ms, half sine) |
| Non-Operating Shock | 250 G (2 ms, half sine) |
| Operating Temperature | 0°C to 60°C |
| Dimensions (L x W x H) | 147.0 mm x 101.6 mm x 26.1 mm |
| Weight | 650 g |
| RoHS Compliant | Yes |
| Encryption | None (0B48723 — non-SED model) |
Frequently Asked Questions about WD Ultrastar HC555 18 TB 3.5 Inch SATA 6Gb/s Enterprise HDD
What does the WD Ultrastar HC555 18 TB 3.5 Inch SATA 6Gb/s Enterprise HDD do?
At 18 TB, the WD Ultrastar HC555 18 TB 3.5 Inch SATA 6Gb/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 SATA 6Gb/s interface is supported by major server platforms.
What are the headline specs of the WD Ultrastar HC555 18 TB 3.5 Inch SATA 6Gb/s Enterprise HDD?
Key specifications for the WD Ultrastar HC555 18 TB 3.5 Inch SATA 6Gb/s Enterprise HDD: capacity 18 TB; form factor 3.5 Inch; interface SATA 6Gb/s; 5 Years support; new condition; model WUH722018CLE6L4; part number 0B48723; capacity 18 TB; interface SATA 6Gb/s; form factor 3.5 Inch; random write iops 550 TBW. Manufacturer part number 0B48723. For the full datasheet with electrical, environmental, and compliance details, contact our pre-sales engineering team.
Is the WD Ultrastar HC555 18 TB 3.5 Inch SATA 6Gb/s Enterprise HDD compatible with my infrastructure?
The WD Ultrastar HC555 18 TB 3.5 Inch SATA 6Gb/s Enterprise HDD uses a SATA 6Gb/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.