CFexpress Type B

ATP Electronics Introduces PCIe® 4.0 x2 CFexpess Type B Cards for High-Speed Imaging/Video Applications



Taipei, Taiwan (April 2023) – ATP Electronics, the global leader in specialized storage and memory solutions, introduces the N651Si / N601Sc  Series CFexpress cards Type B, the latest NAND-flash based high-speed memory cards to adopt the NVMe protocol over PCIe interface. Using the PCIe 4.0 x2 interface, they deliver superior, high-speed performance compared with other cards using the PCIe 3.0 x2 interface.


Convenient Storage Portability, Improved Read/Write Performance, Low Latency


N651Si / N601Sc  CFexpress cards offer convenient portability with enhanced sequential read/write performance of up to 3,500/3,200 MB/s. These removable storage devices are backward-compatible with XQD. The N651Si / N601Sc Series CFexpress cards sport the Gen. 4 x2 interface and are also backward compatible with CFexpress Gen. 3 x2. They are suitable for convenient movement among different devices and provide dependable access in environments with little or no network availability.

The DRAM-less CFexpress cards feature Host Memory Buffer (HMB) support to improve random read performance. Tests also show a 58% drop in latency with HMB-enabled Quality of Service (QoS) writes.

The N651Si / N601Sc  Series CFexpress cards are constructed with 3D triple level cell (TLC) flash and come in a range of capacities meeting varied storage requirements, from 128 GB to 1 TB. They are available in pseudo single level cell (pSLC) flash according to customer request and by project support.

Built for rugged operating environments, the N651Si / N601Sc  Series CFexpress cards offer extended endurance and reliable performance while operating under extreme temperatures, making them excellent choices for high-speed imaging, digital video recording, and other demanding applications in industrial PC/embedded, automation, networking, test and measurement, and transportation systems. The upcoming N651Si Series can support I-Temp operating ranges from -40°C to 85°C, while the N601Sc Series is rated for C-Temp operation at 0°C to 70°C.


Huge Savings with Low Power Consumption, SW RAID 1, 0 Compatibility


The N651Si / N601Sc  Series CFexpress cards support Active State Power Management (ASPM), enabling low power consumption at <2.7 mW (PS4 sleep) and <22 mW (PS3 standby), translating to huge power savings.

Also contributing to lower costs is software RAID 0 and RAID 1 support, so there is no need to invest in a hardware RAID controller. This means substantial savings and better compatibility, as RAID management is done by the processor without impacting system performance, and a RAID array can easily be configured with the built-in functionality.

To ensure optimal sustained performance, the N651Si / N601Sc  Series CFexpress cards continuously monitor device temperature and enable firmware-based throttling that adjusts performance without drastic drops.

Peace-of-Mind Security


TCG Opal 2.0 provides top-notch data encryption/decryption and optional hardware write‑protection security prevents data tampering and unauthorized write access to the device.

Product Specifications


PCIe® Gen4 NVMe CFexpress Card
Product Line
Superior Superior
N651Si N601Sc
Interface PCIe G4 x2 PCIe G4 x2
Flash Type 3D TLC 3D TLC
Form Factor CFexpress Type B CFexpress Type B
Operating Temperature -40°C to 85°C 0°C to 70°C
Power Loss Protection Options Firmware Based Firmware Based
Optional SED Features AES 256-bit Encryption, TCG Opal 2.0 AES 256-bit Encryption, TCG Opal 2.0
Capacity 128 GB to 1 TB 128 GB to 1 TB

Sequential Read (MB/s) up to
3,500 3,500

Sequential Write (MB/s) up to
3,200 3,200

Random Reads IOPS up to
770,000 770,000

Random Writes IOPS up to
750,000 750,000
Endurance and Reliability
Endurance (TBW)1 up to 1,000 TB 1,000TB
MTBF @ 25°C
>2,000,000 hours >2,000,000 hours
Number of Insertions
10,000 minimum 10,000 minimum
Dimensions (mm) 29.6 x 38.5 x 3.8 29.6 x 38.5 x 3.8
Warranty 2 years 2 years
1 Under highest Sequential write value. May vary by density, configuration and applications.


  1. For more information on ATP’s CFexpress Type B cards, visit:
  2. Media Contact on the Press Release: Kelly Lin (Kellylin[at]
  3. Follow ATP Electronics on LinkedIn:


About ATP

ATP Electronics (“ATP”) has dedicated 30 years of manufacturing excellence as the premier provider of memory and NAND flash storage products for rigorous embedded/industrial/automotive applications. As the “Global Leader in Specialized Storage and Memory Solutions,” ATP is known for its expertise in thermal and high-endurance solutions. ATP is committed to delivering add-on value, differentiation and best TCO for customers. A true manufacturer, ATP manages every stage of the manufacturing process to ensure quality and product longevity. ATP upholds the highest standards of corporate social responsibility by ensuring sustainable value for workers, the environment, and business throughout the global supply chain. For more information on ATP Electronics, please visit or contact us at info[at]