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Kingston A400

KingstonSSD

A400

Released April 2017.5Press articleweekly.ascii.jp/elem/000/001/462/1462208Read 15 October 2026ASCII Japan: Kingston unveiled the A400 on 3 April 2017 and sales started on 14 April 2017 in Japan, with Amazon.co.jp pre-orders. This is the earliest dated evidence found. Some retailer sheets suggest 2017-05 Last checked 16 October 2026.

Interface
SATA
Form factor
2.5-inch
Capacity
240, 480, 960GB
Read speed
500MB/s

23 of 63 fields known.

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All specs

SourceCalculated

General

Series
Not available
Model numbers
SA400S37/240G, SA400S37/480G, SA400S37/960G1Maker spec sheet (PDF)kingston.com/datasheets/sa400_en.pdfRead 15 October 2026Part Numbers table lists SA400S37/240G, SA400S37/480G and SA400S37/960G for the 2.5 inch standalone drive. The 2022 US datasheet also lists SA400S37/120G and the M.2 2280 model SA400M8. The M.2 model is a different form factor and is not stored here. A 1920GB model, SA400S37/1920G, is sold by retailers but is not on this datasheet2Maker spec sheet (PDF)kingston.com/datasheets/SA400S37_us.pdfRead 15 October 20262022 US datasheet MKD-393.5US lists SA400S37/120G, /240G, /480G and /960G, and the M.2 parts SA400M8/240G and SA400M8/480G. The 120GB is not on the 2024 datasheet and is not stored
GTIN / EAN
740617261219, 740617263442, 7406172773576Retailer pagescan.co.uk/products/240gb-kingston-a400-ssd-25-sata-iii-6-g-bs-up-to-500mb-s-read-up-to-350mb-s-write-speedRead 15 October 2026GTIN row reads 0740617261219, which is UPC 740617261219, for SA400S37/240G7Retailer pagescan.co.uk/products/480gb-kingston-a400-25-ssd-7mm-sata-iii-6gb-s-3d-nand-tlc-500mb-s-read-450mb-s-write-retailRead 15 October 2026GTIN listed as 740617263442 for SA400S37/480G8Retailer pagescan.co.uk/products/960gb-kingston-a400-25-ssd-sata-iii-6gb-s-2ch-tlc-500mb-s-read-450mb-s-write-retailRead 15 October 2026GTIN row reads 0740617277357, which is UPC 740617277357, for SA400S37/960G. A search result for an eBay Germany listing shows the same EAN
Announced
3 April 20175Press articleweekly.ascii.jp/elem/000/001/462/1462208Read 15 October 20263 April 2017, the Japan announcement. No global Kingston press release was readable
Status
Available1Maker spec sheet (PDF)kingston.com/datasheets/sa400_en.pdfRead 15 October 2026The current Kingston datasheet and product page title cover the drive, and Kingston's May 2026 press release marks 100 million units shipped4Press articlethemachinemaker.com/news/kingston-surpasses-100-million-a400-sata-ssd-shipments-worldwideRead 15 October 2026Trade coverage dated 3 June 2026 of Kingston's press release that more than 100 million A400 SATA SSDs have shipped since the 2017 launch. Kingston's own release is behind a Cloudflare challenge
Predecessor
Not available
Successor
Not available
Launch price (US)
Not available
Launch price (EU)
Not available
Markets
Not available
Colours
Not available
Form factor
2.5-inch1Maker spec sheet (PDF)kingston.com/datasheets/sa400_en.pdfRead 15 October 2026Form factor row reads 2.5 inch. Key Features says a 2.5 inch 7 mm form factor
Capacity
240, 480, 960GB1Maker spec sheet (PDF)kingston.com/datasheets/sa400_en.pdfRead 15 October 2026Capacities row reads 240GB, 480GB, 960GB. Kingston's flash guide footnote says part of the listed capacity is used for formatting. The 2022 US datasheet also lists 120GB2Maker spec sheet (PDF)kingston.com/datasheets/SA400S37_us.pdfRead 15 October 2026Lists 120GB, 240GB, 480GB and 960GB. The 120GB model is left out because the 2024 datasheet no longer lists it

Interface

Interface
SATA1Maker spec sheet (PDF)kingston.com/datasheets/sa400_en.pdfRead 15 October 2026Interface row reads SATA Rev. 3.0 (6Gb/s) with backwards compatibility to SATA Rev. 2.0 (3Gb/s)
PCIe generation
Not available
PCIe lanes
Not available
NVMe version
Not available
Detachable cable
Not available

Hardware

Controller
Not available
Flash type
TLC5Press articleweekly.ascii.jp/elem/000/001/462/1462208Read 15 October 2026Article describes a 2-channel controller and TLC NAND, and says the controller and NAND used to meet the specs may vary with production date6Retailer pagescan.co.uk/products/240gb-kingston-a400-ssd-25-sata-iii-6-g-bs-up-to-500mb-s-read-up-to-350mb-s-write-speedRead 15 October 2026Flash Memory Type row reads TLC7Retailer pagescan.co.uk/products/480gb-kingston-a400-25-ssd-7mm-sata-iii-6gb-s-3d-nand-tlc-500mb-s-read-450mb-s-write-retailRead 15 October 2026Flash Memory Type row reads TLC, with 3D NAND in the overview8Retailer pagescan.co.uk/products/960gb-kingston-a400-25-ssd-sata-iii-6gb-s-2ch-tlc-500mb-s-read-450mb-s-write-retailRead 15 October 2026Flash Memory Type row reads TLC
Flash memory
Not available
Flash layers
Not available
DRAM cache
None6Retailer pagescan.co.uk/products/240gb-kingston-a400-ssd-25-sata-iii-6-g-bs-up-to-500mb-s-read-up-to-350mb-s-write-speedRead 15 October 2026DRAM Cache Memory row reads N/A. The controller row reads 2Ch. SATA has no host memory buffer, so the value is none7Retailer pagescan.co.uk/products/480gb-kingston-a400-25-ssd-7mm-sata-iii-6gb-s-3d-nand-tlc-500mb-s-read-450mb-s-write-retailRead 15 October 2026DRAM Cache Memory row reads N/A8Retailer pagescan.co.uk/products/960gb-kingston-a400-25-ssd-sata-iii-6gb-s-2ch-tlc-500mb-s-read-450mb-s-write-retailRead 15 October 2026DRAM Cache Memory row reads N/A9Retailer pageinet.se/produkt/4300499/kingston-a400-480gb-2-5Read 15 October 2026A customer Q&A on the 480GB page, written for the 120GB model, says the A400 has no DRAM cache and uses a pseudo-SLC cache for write speed. Memory type row reads TLC
DRAM cache size
Not available
Component sides
Not available

Performance

Sequential read (claimed)
500MB/s1Maker spec sheet (PDF)kingston.com/datasheets/sa400_en.pdfRead 15 October 2026Baseline performance, data transfer (ATTO): up to 500 MB/s read for 240GB, 480GB and 960GB. Footnote 1: out-of-box performance on a SATA Rev. 3.0 motherboard. Host not named2Maker spec sheet (PDF)kingston.com/datasheets/SA400S37_us.pdfRead 15 October 2026Same ATTO figures as the 2024 datasheet: up to 500 MB/s read
Sequential write (claimed)
450MB/s1Maker spec sheet (PDF)kingston.com/datasheets/sa400_en.pdfRead 15 October 2026ATTO: 350 MB/s (240GB), 450 MB/s (480GB), 450 MB/s (960GB). Same test conditions as read. Base value is the 960GB model, the largest capacity on the datasheet2Maker spec sheet (PDF)kingston.com/datasheets/SA400S37_us.pdfRead 15 October 2026Same ATTO figures: 350 MB/s (240GB) and 450 MB/s (480GB and 960GB). 120GB is 320 MB/s
Random 4K read (claimed)
Not available
Random 4K write (claimed)
Not available

Endurance and reliability

Endurance (TBW)
300TB1Maker spec sheet (PDF)kingston.com/datasheets/sa400_en.pdfRead 15 October 2026TBW row: 240GB 80 TB, 480GB 160 TB, 960GB 300 TB. Footnote 4: derived from the JEDEC workload JESD219A. Base value is the 960GB model2Maker spec sheet (PDF)kingston.com/datasheets/SA400S37_us.pdfRead 15 October 2026Same TBW: 80 TB, 160 TB and 300 TB. 120GB is 40 TB
MTBF or MTTF (claimed)
2,000,000h1Maker spec sheet (PDF)kingston.com/datasheets/sa400_en.pdfRead 15 October 2026Life expectancy row reads 2 million hours MTBF. The 2022 US and Latin America datasheets (MKD-393.5US) read 1 million hours MTBF, and retailer copies also say 1,000,000. The newest datasheet is stored2Maker spec sheet (PDF)kingston.com/datasheets/SA400S37_us.pdfRead 15 October 2026Life expectancy 1 million hours MTBF. This disagrees with the 2024 datasheet, which reads 2 million hours. The 2024 value is stored
Operating temperature
Min0Max70°C1Maker spec sheet (PDF)kingston.com/datasheets/sa400_en.pdfRead 15 October 2026Operating temperature 0 to 70 C. Storage range of -40 to 85 C is not stored2Maker spec sheet (PDF)kingston.com/datasheets/SA400S37_us.pdfRead 15 October 20260 to 70 C, same as the 2024 datasheet

Power

Power while reading (claimed)
Not available
Power while writing (claimed)
Not available
Max power consumption (claimed)
1.535W1Maker spec sheet (PDF)kingston.com/datasheets/sa400_en.pdfRead 15 October 2026Power consumption row reads 0.195W idle / 0.279W avg / 0.642W (MAX) read / 1.535W (MAX) write. The higher max figure is stored, 1.535 W for write. The max read figure is 0.642 W. The datasheet gives no test tool, so the figures are as published2Maker spec sheet (PDF)kingston.com/datasheets/SA400S37_us.pdfRead 15 October 2026Same power row: 0.642 W max read and 1.535 W max write
Average power in light use (claimed)
279mW1Maker spec sheet (PDF)kingston.com/datasheets/sa400_en.pdfRead 15 October 20260.279W Avg is stored as 279 mW. The A400 datasheet does not name the workload behind the average. The 0.195 W idle figure is not stored, since the datasheet names no low-power state2Maker spec sheet (PDF)kingston.com/datasheets/SA400S37_us.pdfRead 15 October 2026Same 0.279 W avg figure
Idle power (claimed)
Not available
Sleep power (claimed)
Not available

Measured

We could not find any of these 9 fields. Show them
Sequential read (measured)
Not available
Sequential write (measured)
Not available
Random 4K read at queue depth 1 (measured)
Not available
Random 4K write at queue depth 1 (measured)
Not available
Write cache size (measured)
Not available
Write speed after the cache (measured)
Not available
3DMark Storage Benchmark
Not available
Highest temperature under load (measured)
Not available
Idle power (measured)
Not available

Cooling and build

We could not find any of these 4 fields. Show them
Heatsink
Not available
RGB lighting
Not available
Dust and water rating
Not available
Drop test height
Not available

Security and software

Security
Not available
Software
Kingston SSD Manager1Maker spec sheet (PDF)kingston.com/datasheets/sa400_en.pdfRead 15 October 2026Footnote 3 says the SSD Life Remaining value can be read with Kingston SSD Manager

Compatibility

Platforms
PC (no OS named)1Maker spec sheet (PDF)kingston.com/datasheets/sa400_en.pdfRead 15 October 2026Text says the drive is designed for desktop and notebook computer workloads and not for server environments. Stored as PC, since no operating system is named

Dimensions and weight

Front and side, drawn to scale.

Dimensions
Length100Width69.9Height7mm(3.9 × 2.8 × 0.3 in)1Maker spec sheet (PDF)kingston.com/datasheets/sa400_en.pdfRead 15 October 2026Dimensions row reads 100.0mm x 69.9mm x 7.0mm (2.5 inch)2Maker spec sheet (PDF)kingston.com/datasheets/SA400S37_us.pdfRead 15 October 2026100.0mm x 69.9mm x 7.0mm for the 2.5 inch drive
Weight
41.9g(1.5 oz)1Maker spec sheet (PDF)kingston.com/datasheets/sa400_en.pdfRead 15 October 2026Weight row: 41 g (240-480GB), 41.9 g (960GB). Base value is the 960GB model2Maker spec sheet (PDF)kingston.com/datasheets/SA400S37_us.pdfRead 15 October 202641g (240-480GB) and 41.9g (960GB). 39 g for the 120GB 2.5 inch

In the box

We could not find any of these 2 fields. Show them
In the box
Not available
Cables included
Not available

Warranty

Manufacturer warranty (source market)
3years1Maker spec sheet (PDF)kingston.com/datasheets/sa400_en.pdfRead 15 October 2026Limited 3-year warranty with free technical support. Footnote 3 adds that the warranty runs 3 years or until Life Remaining is used up. The datasheet is global and names no market2Maker spec sheet (PDF)kingston.com/datasheets/SA400S37_us.pdfRead 15 October 2026Limited 3-year warranty with free technical support

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Variants

Each variant lists only what differs from the specs above.

Model numberGTINCapacitySequential read (claimed)Sequential write (claimed)Endurance (TBW)Weight
SA400S37/240G740617261219240 GB500 MB/s350 MB/s80 TB41 g
SA400S37/480G740617263442480 GB500 MB/s450 MB/s160 TB41 g
SA400S37/960G740617277357960 GB500 MB/s450 MB/s300 TB41.9 g

Sources

We read 9 sources for this SSD. The numbers match the markers in the sheet.

  1. Read 15 October 2026Backs 19 fields
  2. Read 15 October 2026Backs 13 fields
  3. Read 15 October 2026Backs 1 field
  4. Read 15 October 2026Backs 1 field
  5. Read 15 October 2026Backs 4 fields
  6. Read 15 October 2026Backs 4 fields
  7. Read 15 October 2026Backs 4 fields
  8. Read 15 October 2026Backs 4 fields
  9. Read 15 October 2026Backs 1 field

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