Seagate-IMSourcing Momentus 7200.4 ST9500420AS 500 GB 2.5" Hard Drive - SATA - 7200 rpm - 16 MB Buffer - Hot Swappable - Plug-in Module
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  • Innovative hard drive features for every laptop.

    Momentus® laptop hard drives deliver feature-rich performance and innovative upgrades with capacity points up to 750 GB.

    • G-Force Protection™ technology can protect your data even if you drop your laptop
    • Seagate® Smart Align™ technology for a simple, utility-free transition to the new Advanced Format 4K sector standard
    • Self-Encrypting Drive (SED) models, including FIPS 140-2 Validated SED for government-grade security
  • Data protection for dropped laptops.

    Optional Seagate G-Force Protection technology helps protect the data stored on your Momentus hard drive if you drop your laptop.

  • Easily migrates to Advanced Format.

    Select Momentus laptop hard drives include Seagate SmartAlign technology. This innovation helps you easily get all the benefits of the new Advanced Format 4K sector standard–no utilities, no extra steps.

  • Secure Self-Encrypting Drive options.

    Momentus Self-Encrypting Drive (SED) options can securely protect your data where it lives–on the hard drive–without affecting performance. You get all the benefits of secure data encryption without the headaches.



  • G-Force Protection™ technology.

    Optional upgrades for Momentus® laptop hard drives include Seagate® G-Force Protection technology.

    When G-Force Protection technology detects that your hard drive has been dropped, it instantly swings the drive heads to a safe zone away from the storage disk. This can keep your critical data safe and recoverable at impact, even if your laptop does not survive.

  • SmartAlign™ technology for easy 4K migration.

    A change is coming to the hard drive industry. The smallest sector of organized data on a drive is moving from 512 to 4,096 bytes. The new format, known as Advanced Format (AF) 4K, offers advantages like increased efficiency, but migrating your drive can be challenging.

    Luckily, Seagate is ready to help you make a seamless transition to 4K sectors.

    Select Momentus laptop hard drives feature Seagate SmartAlign technology, which automatically does the work of AF migration in the background. The drive’s performance is not affected, and there is no need for time-consuming utilities required by other AF-enabled drives.


  • Optimal security with Self-Encrypting Drives.

    Momentus laptop hard drives are available as a Self-Encrypting Drive (SED)* that protects your data the instant you save it to your drive. For government-grade security, Momentus internal hard drives can also be purchased as a FIPS 140-2 Validated SED.1

    Lost laptop? Rest easy knowing that your data is protected and 100% encrypted–always.

    Select Momentus laptop hard drives features include:

    • Instant on-the-fly encryption without performance degradation
    • SecureErase™ technology can instantly erase the secure key data on your hard drive, enabling safe and easy disposal or repurposing of the drive



Formatted Capacity500 GB
Form Factor2.5
Spindle Speed (RPM)7200
Cache (MB)16
Transfer Rate, Max Ext (MB/s)300
Sustained Data Rate OD1.23 MB/s
Average Latency (ms)4.17
Reliability/Data Integrity
Nonrecoverable Read Errors per Bits Read1 in 10 14
Power Management
Idle, Typical Operating (W)0.69
Operating0 to 60 °C
Non-operating-40 to 70 °C
Operating: Gs (ms)350 (2ms)
Non-operating: Gs (ms)1000 (1ms)
Acoustics (bels - sound power)
Height (in/mm)0.370/9.5
Width (in/mm)2.750/69.85
Length (in/mm)3.951/100.35
Weight (lb/g)0.238/110
PackageDrive Only
InterfaceSATA 3Gb/s
Spindle Speed (RPM)7200RPM
Cache (MB)16MB
Areal Density394
Maximum Operating Shock350Gs
Storage TypeHDD
Typical Weight110g
AFR0.5 %
Operating Temperature60°C
Average Operating Power1.4W


  1. 1 Not available in all countries. See FIPS 140-2 Level 2 Certificate. TM: The FIPS logo is a certification mark of NIST, which does not imply endorsement by NIST, the U.S., or Canadian governments.

General Information

The Seagate Momentus 7200.4 drive delivers the highest available capacity on a laptop hard drive while satisfying today's need for performance. System builders can count on extending the life of their 7200-RPM laptops by eliminating the need to replace or upgrade due to performance issues.

Technical Information
Storage Capacity:500 GB

Drive Performance
Maximum External Data Transfer Rate:300 MBps (2.3 Gbps)
Rotational Speed:7200 rpm
Buffer:16 MB

Drive Interface:SATA
Drive Interface Standard:SATA/300

Physical Characteristics
Form Factor:Plug-in Module
Drive Width:2.5"
Hot Swappable:Yes
Weight (Approximate):3.88 oz

Additional Warranty Information:
  • Product does not ship from original manufacturer
  • Product may not be eligible for original manufacturer warranty, rebates or programs
  • Direct replacement warranty provided by Ingram Micro (1 year for components, 3 year for systems)
  • Product ships from IMSourcing facility within 2-3 days or from stock
  • Product may ship in non-standard packaging
  • All returns processed directly from IMSourcing
  • Product condition subject to availability
  • Replacement parts are from our Service inventory and meet our rigorous inspection and quality standards. Some will be new, some are manufacturer certified refurbished, some are considered 'as new' and have been tested, refurbished or remanufactured. All are fully warranted
  • Where applicable, -IM indicates an Ingram Micro certified pre-owned product

  • Product images may differ from actual product appearance.
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    Shipping Restrictions
    • This item cannot be shipped to PO Boxes.
    • This item can be shipped only within the U.S.

    • UPC: 890552658503 
    • Mfr's Part #: ST9500420AS