WD Ultrastar DC HC520 SE 12 TB SATA | HDD | for data centers, 7200 rpm, 256 MB cache

CODE: 0F30146 / EAN: 8717306638999

WD Ultrastar DC HC520 SE 12 TB SATA | HDD | for data centers, 7200 rpm, 256 MB cache

CODE: 0F30146 / EAN: 8717306638999
271,37 EUR without VAT (net)
Any customs costs and VAT are to be borne by the buyer in the country of receipt.
Average latency: 4.16
Bytes per sector: 512
Component for: Surveillance system
Depth: 147
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Western Digital 12TB DC HDD - the ideal data center solution

The Ultrastar DC HC500 Series is designed for public and private cloud environments where storage density and cost-effective infrastructure are critical.

western digital data center drives ultra star

WD Ultra Star DC HC520 drive benefits

  • 12TB capacity in a standard 3.5-inch form factor
  • CMR technology works seamlessly in high-capacity enterprise applications and environments
  • Reliable, field-proven fifth generation design
  • HelioSeal® design for exceptional power efficiency (Watts/TB)
  • TDMR and improved two-stage micro-actuator for optimum head positioning and resistance to rotational vibration
  • MTBF of 2.5 million hours
  • Self-encrypting drive options
western digital ULTRASTAR DC HC520

Higher capacity and lower maintenance costs

To meet the growing demand for high capacity, Western Digital introduces the 12TB Ultrastar® DC HC520 hard drive. Built using HelioSeal technology, the industry's only fifth-generation helium platform and the foundation for our high-capacity DC HC500 series, the Ultrastar DC HC520 is designed for public and private cloud environments where storage density, Watts/TB and cost/TB are critical parameters in creating the most cost-effective infrastructure.

HelioSeal technology helps meet the challenges of next-generation data centers

HelioSeal technology enables the Ultrastar DC HC520 drive to have one of the lowest power profiles in the industry, helping data center architects meet green goals and requirements. Designed to support workloads up to 550TB per year, the Ultrastar DC HC520 is based on conventional magnetic recording (CMR) technology for ease of installation in enterprise and cloud data centers.

Reliability and efficiency thanks to modern solutions

Features such as TDMR (two-dimensional magnetic recording) technology and a third-generation two-stage micro-actuator work together to increase head positioning accuracy and deliver improved performance, data integrity and overall drive reliability, which is critical in multi-drive environments where operational vibration is a concern. A choice of SATA 6Gb/s or SAS 12Gb/s interfaces enables easy integration into high-performance data centers.

wd ultrastar technologies

Data persistence and data security features to support compliance with privacy regulations and requirements

With massive capacity and unmatched reliability, Ultrastar DC HC520 is ideal for object storage deployments. Compliance and privacy requirements drive the need for increased data security. Ultrastar DC HC520 offers security and encryption options to help protect data from unauthorized use on both SATA and SAS models.


Features / filters
Average latency 4.16
Bytes per sector 512
Component for Surveillance system
Depth 147
Harmonized System (HS) code 84717050
HDD capacity 12000
HDD interface transfer rate 6
HDD size 3.5
HDD speed 7200
Height 26.1
Interface Serial ATA III
Mean time between failures (MTBF) 2500000
Non-operating shock 300
Non-operating vibration 1.04
Operating shock 70
Operating temperature (T-T) 5 - 60
Operating vibration 0.67
Operating voltage 5 / 12
Power consumption (idle) 5.3
Power consumption (typical) 7.2
Quantity 1
Read seek time 8
Storage drive adapter included No
Storage drive buffer size 256
Storage temperature (T-T) -40 - 70
Type HDD
Weight 660
Width 101.6
Write seek time 8.6

Technical data
Capacity 12 TB
Interface SATA
Security SE
Disk speed 7200 rpm
Cache memory 256 MB
Data transmission speed up to 255 MB/s
Latency (average) 4.16 ms
MTBF 2.5 million hours
Energy consumption During operation: 6.9W
At rest: 5W
Dimensions 147mm x 101.6mm x 26.1mm
Weight 690 g


For which applications is the Western Digital Ultrastar DC HC520 12TB hard drive intended?

  • Enterprise and data center applications where capacity concentration, power efficiency and reliability are paramount

  • Cloud storage

  • Massive scale-out (MSO) data centers

  • Distributed file systems

  • Mass storage using object-oriented solutions such as Ceph™ and OpenStack® Swift

  • Primary and secondary storage for Apache Hadoop® for big data analytics

  • Centralized video surveillance

  • Ideal for all major enterprise applications

  • What are the benefits of purchasing a Western Digital Ultrastar DC HC520 12TB drive?

  • Delivers 50% more capacity than 8TB airline drives

  • 52% lower idle W/TB ratio than Ultrastar 8TB air-attached drives

  • Maintains drive performance in high rotational vibration environments and multi-drive systems

  • Improves response time and data management

  • Retains previous firmware version during secure upgrade, verified with RSA signature

  • The industry's highest reliability Enterprise Capacity hard drive, resulting in fewer failures/fewer service calls

  • Unrivaled among enterprise hard drives

  • Hardware encryption helps protect data from unauthorized use (SED options)

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    271,37 EUR without VAT (net)
    Any customs costs and VAT are to be borne by the buyer in the country of receipt.
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