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Black rectangular 2.5 inch SATA SSD with Kingston A400 label

Kingston Technology Corp.

Kingston Technology Corp. SA400S37/240G 240GB 2.5" SATA internal SSD

SKU CH-SG82-W66PK MPN SA400S37/240G

A 240GB 2.5" SATA internal SSD using 3D NAND, delivering sequential reads up to 500 MBps and writes up to 350 MBps with no DRAM cache, shock and vibration resistance.

  • Total capacity240 GB
  • Sequential read speedUp to 500 MB/s
  • Sequential write speedUp to 350 MB/s
  • Interface typeSATA III
  • Form factor2.5 in (6.35 cm)
  • Product typeInternal Solid State Drive (SSD)

Model 240GB

  • Faster boot and file transfers with 500 MBps read speed
  • Quicker saves and installs at 350 MBps write speed
  • Shock and vibration resistance protects data in notebooks
  • Low 0.279 W active draw runs cooler than a hard drive
  • 1,000,000 hour MTBF signals long-term reliability

Capacity and interface

The Kingston A400 240GB drive uses a 2.5 inch SATA form factor and 3D NAND flash memory. It targets users who want faster boot and load times on systems limited to the SATA interface. The lack of a DRAM cache is offset by host memory buffer support for everyday responsiveness.

Sustained load behaviour

Sequential write speeds reach 350 MBps while reads peak at 500 MBps, and the controller maintains these rates across typical consumer workloads. Average active power stays at 0.279 W with a maximum write draw of 1.535 W, so thermal output remains low inside cramped notebook chassis. The drive operates reliably from 0 °C to 70 °C and endures 2.17 G vibration while running.

Upgrade context

It replaces any 2.5 inch mechanical hard drive up to 960 GB, delivering roughly ten times the speed for start-up, file transfers and application launches. The jump is most worthwhile when reviving an older laptop or desktop that cannot accept newer interfaces but still has a SATA bay. Shock resistance of 20 G while powered off adds durability for mobile use.

How it compares

Measured against everything we stock in Internal NVMe & SATA SSDs, at today’s prices. Recalculated every night.

Price $64.99
Cheaper than about 85% of the 1,994 comparable items (median $180.49).
Total capacity 240 GB
Lower than about 90% of the 1,368 comparable items (median 1 TB).
Sequential read speed Up to 500 MB/s
Lower than about 90% of the 1,180 comparable items (median 2,400 MB/s).
Price per TB $270.79 per TB
Pricier than about 72% of the 1,362 comparable items (median $165.50 per TB).

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Specifications

Product
Brand nameKingston
Product lineA400
Model nameSA400S37/240G
Total capacity240 GB
Product typeInternal Solid State Drive (SSD)
Intended useConsumer
Performance
Sequential read speedUp to 500 MB/s
Sequential write speedUp to 350 MB/s
Storage
NAND flash type3D NAND
Cache memoryNo DRAM (HMB)
Connectivity
Connection protocolSATA
Ports & slots
Interface typeSATA III
Power
Idle power draw0.195 W
Active power draw0.279 W Avg
0.642 W (MAX) Read
1.535 W (MAX) Write
Size & build
Form factor2.5 in (6.35 cm)
Overall height7 mm
Overall width69.9 mm
Product depth100 mm
Product weight41g
Shipping weight0.07 kg
Package size182 × 130 × 3 mm
Environment & compliance
Operating temperature range0 °C to 70 °C
Storage temperature range-40 °C to 85 °C
Vibration toleranceOperating: 2.17G Peak (7-800 Hz)
Non-operating: 20G Peak (10-2000 Hz)
More details
Mean time between failures1,000,000 h

Other versions of this model

4 more in the same range

Questions about this item

How much power does the A400 240GB draw during all-day operation?

The drive averages 0.279W active and peaks at 1.535W during write bursts, while idle power is only 0.195W. With no moving parts it runs silently and stays within the 0°C to 70°C operating range.

What connector and bay does the SA400S37/240G need to work?

It requires a standard SATA III data cable and a SATA power connector from the host, plus a 2.5" drive bay or bracket. No extra drivers are needed for Windows, Linux or macOS.

Will this 2.5" SATA SSD work in an older laptop that still uses a mechanical hard drive?

Yes. The SATA III interface is backward compatible with SATA II and SATA I ports, so the drive will function in legacy notebooks and desktops, delivering up to 500MB/s read and 350MB/s write where the link allows.

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