2.5-inch HDD laptop performance drives. SED and FIPS options.
US$750B+ Investment Needed for SSD to Replace US$30B HDD Business
More1Seagate SmartAlign technology may not be available on all models. Please refer to the Momentus Thin data sheet for clarification.
2Self-Encrypting Drives (SEDs) and FIPS 140-2 Validated drives are not available for all models or countries. TM: The FIPS logo is a certification mark of NIST, which does not imply product endorsement by NIST, nor by the US or Canadian governments.
Until recently, system integrators and OEMs had no choice but to limit their thinner, fully functional computing designs to high-end devices. The available hard drive options were either too costly, performed too slowly, or both.
Enter Seagate ingenuity Momentus® Thin hard drives exploit current laptop drives in both material and product design to provide the world’s first 7mm 2.5 inch form factor drive.
The result is affordable, thin storage for entry-level to mainstream laptops, high-end netbooks, thin ultraportables and more. Momentus Thin drives open new frontiers in slim-computing design.
A change is coming in the hard drive industry. The smallest sector of organised data on a drive is increasing from 512 to 4,096 bytes. The new format, known as Advanced Format (AF) 4K, offers advantages such as increased efficiency, but migrating your drive can be challenging.
Luckily, Seagate is ready to help you make a seamless transition to 4K sectors.
Momentus Thin 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 the time-consuming utilities that are required by other AF-enabled drives.
Smart
Momentus Thin hard drives are available as Self-Encrypting Drives (SEDs) that help secure your data the instant you save it to your drive. For US-government-grade security, the Momentus Thin hard drive can also be purchased as a FIPS 140-2 Validated SED.1
Have you lost your laptop? Rest easy knowing that your data is secure and one hundred per cent encrypted — always. Momentus Thin hard drive features include:
1Self-Encrypting Drives (SED) and FIPS 140-2 Validated drives are not available for all models or countries. TM: The FIPS logo is a certification mark of NIST, which does not imply product endorsement by NIST, nor by the US or Canadian governments.

| Capacity | 500GB | 320GB | 250GB | 160GB |
|---|---|---|---|---|
| Show me: | ||||
| Form Factor | 2.5" | 2.5" | 2.5" | 2.5" |
| Interface Options | SATA 6Gb/s | SATA 3Gb/s, SATA 6Gb/s | SATA 3Gb/s, SATA 6Gb/s | SATA 3Gb/s |
| Performance | ||||
| Spindle Speed (RPM) | 5400 | 7200, 5400 | 7200, 5400 | 5400, 7200 |
| Cache (MB) | 16 | 16 | 16 | 16 |
| Transfer Rate, Max Ext (MB/s) | 600 | 300, 600 | 300, 600 | 300 |
| Sustained Data Rate OD | ||||
| Average Latency (ms) | 5.6 | 4.17, 5.6 | 4.17, 5.6 | 5.6, 4.17 |
| Reliability/Data Integrity | ||||
| Non-recoverable Read Errors per Bits Read | 1 in 1014 | 1 in 1014 | 1 in 1014 | 1 in 1014 |
| Annualised Failure Rate (AFR) | 0.50% | 0.50% | 0.50% | |
| Power Management | ||||
| Seek, Typical Operating (W) | 1.40 | 1.60, 1.40 | 1.60, 1.40 | 1.40, 1.60 |
| Idling, Typical Operating (W) | 0.45 | 0.66, 0.48, 0.45 | 0.66, 0.48, 0.45 | 0.48, 0.66 |
| Environmental | ||||
| Temperature | ||||
| Operating | 0° to 60°C | 0° to 60°C | 0° to 60°C | 0° to 60°C |
| Non-operating | -40° to 70°C | -40° to 70°C | -40° to 70°C | -40° to 70°C |
| Shock | ||||
| Operating: Gs (ms) | 400 (2ms) | 350 (2ms), 400 (2ms) | 350 (2ms), 400 (2ms) | 350 (2ms) |
| Non-operating: Gs (ms) | 1000 (1ms) | 1000 (1ms) | 1000 (1ms) | 1000 (1ms) |
| Acoustics (bels - sound power) | ||||
| Idling | 2.0 | 2.3, 2.0 | 2.3, 2.0 | 2.0, 2.3 |
| Operating | 2.2 | 2.5, 2.2 | 2.5, 2.2 | 2.2, 2.5 |
| Physical | ||||
| Height (in/mm) | 0.276/7.0 | 0.276/7.0 | 0.276/7.0 | 0.276/7.0 |
| Width (in/mm) | 2.760/70.10 | 2.76/70.10, 2.760/70.10 | 2.76/70.10, 2.760/70.10 | 2.76/70.10 |
| Length (in/mm) | 3.959/100.55 | 3.959/100.55 | 3.959/100.55 | 3.959/100.55 |
| Height (in/mm) (maximum) | 0.276/7.0 | |||
| Width (in/mm) (maximum) | 2.76/70.10 | |||
| Length (in/mm) (maximum) | 3.959/100.55 | 3.959/100.55 | ||
| Weight (lbs/g) | 0.209/95 | .203/92, 0.209/95 | .203/92, 0.209/95 | .203/92 |
| Model Number | Capacity | Interface | Spindle Speed (RPM) | Cache (MB) | Areal Density | Encryption | Maximum Operating Shock | Length | Width | Height | Typical Weight | AFR | Operating Temperature | Average Operating Power |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ST500LT025 | 500GB | SATA 6Gb/s | 5400RPM | 16MB | 705 | Encryption | 400Gs | 100.55mm | 70.10mm | 7.0mm | 95g | 60°C | 1.20W | |
| ST500LT015 | 500GB | SATA 6Gb/s | 5400RPM | 16MB | 705 | Encryption/FIPS | 400Gs | 100.55mm | 70.10mm | 7.0mm | 95g | 60°C | 1.20W | |
| ST500LT012 | 500GB | SATA 6Gb/s | 5400RPM | 16MB | 705 | 400Gs | 100.55mm | 70.10mm | 7.0mm | 95g | 60°C | 1.20W | ||
| ST320LT012 | 320GB | SATA 6Gb/s | 5400RPM | 16MB | 705 | 400Gs | 100.55mm | 70.10mm | 7.0mm | 95g | 60°C | 1.20W | ||
| ST320LT020 | 320GB | SATA 3Gb/s | 5400RPM | 16MB | 425 | 350Gs | 100.55mm | 70.10mm | 7.0mm | 92g | 0.50% | 60°C | 1.30W | |
| ST320LT007 | 320GB | SATA 3Gb/s | 7200RPM | 16MB | 425 | 350Gs | 100.55mm | 70.10mm | 7.0mm | 92g | 0.50% | 60°C | 1.30W | |
| ST320LT014 | 320GB | SATA 3Gb/s | 7200RPM | 16MB | 425 | Encryption | 350Gs | 100.55mm | 70.10mm | 7.0mm | 92g | 0.50% | 60°C | 1.30W |
| ST250LT003 | 250GB | SATA 3Gb/s | 5400RPM | 16MB | 425 | 350Gs | 92g | 0.50% | 60°C | 1.30W | ||||
| ST250LT012 | 250GB | SATA 6Gb/s | 5400RPM | 16MB | 705 | 400Gs | 100.55mm | 70.10mm | 7.0mm | 95g | 60°C | 1.20W | ||
| ST250LT007 | 250GB | SATA 3Gb/s | 7200RPM | 16MB | 425 | 350Gs | 100.55mm | 70.10mm | 7.0mm | 92g | 0.50% | 60°C | 1.30W | |
| ST250LT009 | 250GB | SATA 3Gb/s | 7200RPM | 16MB | 425 | Encryption/FIPS | 350Gs | 92g | 0.50% | 60°C | 1.30W | |||
| ST250LT014 | 250GB | SATA 3Gb/s | 7200RPM | 16MB | 425 | Encryption | 350Gs | 92g | 0.50% | 60°C | 1.30W | |||
| ST160LT003 | 160GB | SATA 3Gb/s | 5400RPM | 16MB | 425 | 350Gs | 100.55mm | 70.10mm | 7.0mm | 92g | 0.50% | 60°C | 1.30W | |
| ST160LT007 | 160GB | SATA 3Gb/s | 7200RPM | 16MB | 425 | 350Gs | 70.10mm | 7.0mm | 92g | 0.50% | 60°C | 1.30W |