Western Digital® PC SN520 NVMe™ SSD
Fueling Innovation
Design Flexibility
With future-ready, scalable NVMe architecture, the Western Digital
PC SN520 NVMe SSD offers a robust solution to fuel generations of innovative
IoT applications. Scalable NVMe offers a significant performance increase over
SATA SSDs while further optimizing low power consumption to the low level
of 2.5mW.
This NVMe SSD enables greater design flexibility for IoT and embedded
customers, who seek a cost effective, small form factor, reliable and rugged
storage device with low capacity points from 128GB to 512GB.
Robust Construction Suited for IoT
The Western Digital PC SN520 NVMe SSD, supporting PCIe Gen3 x2,
is designed for applications that have a limited number of PCIe lanes available
for storage, however, require both high performance and low power. Partners
that could benefit from NVMe technology include:
• Commercial: Interactive kiosks, ATMs and Point-of-Sales (POS), Multi-Functional
Printers (MFP) and industries that require high-volume transaction processing
• Edge Equipment and IoT Gateway: Such as network equipment, industrial
machinery, medical equipment, or embedded PC that need the high
capacities to capture the floor’s and sensors’ data and the high IOPS
to support the system’s data analytics
• Media Content Delivery and Streaming: In-flight entertainment systems,
train control and monitoring systems, data recorder and video surveillance
that require high capacity and reliability
Versatile Options for IoT
Equipped with a fully integrated solution which includes in-house controller, 64-layer 3D NAND, firmware, and testing,
Western Digital provides longevity, supply and a robust and reliable design.
Designed with Western Digital’s in-house tiered-caching NVMe architecture, the Western Digital PC SN520 NVMe SSD delivers
high performance with sequential read and write speeds up to 1,700MB/s and 1,400MB/s respectively and high endurance up
to 300 TBW, all of which are available in a variety of small form factors: M.2 2230, M.2 2242, M.2 2280.
Summary
Western Digital PC SN520 NVMe SSD, in variety of small, single-sided form factors such as M.2 2230, M.2 2242 and M.2 2280,
enables customers to build ultra-thin, ultra-small boards and systems that address multiple IoT segments, without sacrificing
performance and power consumption.
WESTERN DIGITAL PC SN NVMe SSD
KEY BENEFITS & FEATURES
READ SPEEDS UP TO ,MBS AND LOW
POWER CONSUMPTION LEVERAGES BOTH
THE PCIe GEN3 x INTERFACE, AS WELL AS
SOPHISTICATED NVMe POWER MANAGEMENT
GBGB CAPACITIES AVAILABLE IN THREE
SMALL FORM FACTORS: M. , M. ,
M. 
ENDURANCE OF UP TO  TBW
 YEAR LIMITED WARRANTY
Form Factors M.2 2230, M.2 2242, M.2 2280
Interface PCIe Gen3 x2 NVMe v1.3
Formatted Capacities1128GB, 256GB, 512GB
Performance2128GB 256GB 512GB
Sequential Read up to (MB/s) 1,500 1,700 1,700
Sequential Write up to (MB/s) 800 1,300 1,400
Random Read up to (IOPS) 95K 220K 270K
Random Write up to (IOPS) 90K 175K 280K
Endurance3 (TBW) 100 200 300
Power 128GB 256GB 512GB
Peak Power (10s) (A) 1.2 1.4 1.8
Avg. Active Power4,5 (mW) 75 75 75
Low Power (PS3)5 (mW) 25 25 25
Sleep (PS4)5 (mW) 2.5 2.5 2.5
Supply Voltage (V / ±5%) 3.3 3.3 3.3
Reliability
MTTF6Up to 1.752M hours
Environmental
Operating Temperature732ºF to 158ºF (0ºC to 70ºC)
Non-operating Temperature8-67ºF to 185ºF (-55ºC to 85ºC)
Operating Vibration 5 gRMS, 10–2000 Hz, 3 axes
Non-operating Vibration 4.9 gRMS, 7–800 Hz, 3 axes
Shock 1,500G @0.5 ms half sine
Certifications FCC, UL, TUV, KCC, BSMI, VCCI, C-Tick
Limited Warranty95 years
Physical Dimensions
Width 22mm ±0.15mm
Length 2230: 30mm ±0.15mm; 2242: 42mm ±0.15mm; 2280: 80mm ±0.15mm
Thickness (max) 2.38mm
Weight 2230: 3.5g ±1g; 2242: 4.0g ±1g; 2280: 6.5g ±1g
Western Digital PC SN520 NVMe SSD
Specifications are subject to change
SKU Form Factor Capacity
SDAPTUW-128G M.2 2230 S3-B-M 128GB
SDAPTUW-256G M.2 2230 S3-B-M 256GB
SDAPTUW-512G M.2 2230 S3-B-M 512GB
SDAPMUW-128G M.2 2242 S3-B-M 128GB
SDAPMUW-256G M.2 2242 S3-B-M 256GB
SDAPMUW-512G M.2 2242 S3-B-M 512GB
SDAPNUW-128G M.2 2280 S3-B-M 128GB
SDAPNUW-256G M.2 2280 S3-B-M 256GB
SDAPNUW-512G M.2 2280 S3-B-M 512GB
Western Digital
5601 Great Oaks Parkway
San Jose, CA 95119, USA
www.wdc.com
Western Digital and the Western Digital logo are the registered trademarks of
Western Digital Corporation or it’s affiliates in the U.S. and/or other countries.
All marks are the property of their respective owners. Pictures shown may vary
from actual products. The NVMe™ word mark is a trademark of NVM Express, Inc.
©2018 Western Digital Corporation or its affiliates.
1 As used for storage capacity, one gigabyte (GB) = one billion bytes and one terabyte (TB) = one trillion bytes.
Total accessible capacity varies depending on operating environment.
2 Test Conditions: Performance is based on the CrystalDiskMark 5.2.2 benchmark using a 1000MB LBA range ASUS
Z170A desktop with Intel® i7–6700K 4.0GHz, 8GB 2133MHz DDR4. Windows 10 Pro 64-bit using Microsoft StorNVMe
driver, secondary drive. Performance may vary based on host device. 1 MB = 1,000,000 bytes. IOPS = input/output
operations per second.
3 TBW (terabytes written) values calculated using JEDEC client workload (JESD219) and vary by product capacity.
4 Measured using MobileMark™ 2014 on HP EliteBook X360 1030 G2 with i7–7600U, 8GB RAM. Windows 10 Pro,
64-bit RS3 using Microsoft StorNVMe driver, primary drive.
5 Power measurements at 25°C.
6 MTTF = Mean Time To Failure based on internal testing using Telcordia stress part testing. MTTF is based on a sample
population and is estimated by statistical measurements and acceleration algorithms. MTTF does not predict an
individual drive’s reliability and does not constitute a warranty. (Telecordia SR-332, GB, 40°C)
7 Operational temperature as reported by device (composite temperature.)
8 Non-operational storage temperature does not guarantee data retention.
9 5 years or Max Endurance (TBW) limit, whichever occurs first. 5 year warranty in regions not recognizing “limited.”
See http://support.wdc.com for more details.
Product specifications subject to change without notice. Not all products are available in all regions of the world.