Engineered with cutting-edge radiation-hardened technologies, the PR4 series SSD guarantees steadfast data integrity and reliable performance, even in the most demanding conditions. With unparalleled radiation tolerance, the PR4 SSD is the ideal choice for aerospace and mission-critical deployments, ensuring confidence in every operation. Product Specs and Datasheet →
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NAND Flash
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The PR4 SSD integrates Exascend’s Neutron Shield 2.0, ensuring advanced radiation-induced bit flip correction and dual-copy firmware protection. In critical situations, the PR4 SSD seamlessly transitions into safe mode, autonomously resetting from fatal errors to ensure uninterrupted operations.
Exascend's PR4 U.2 and E1.S models consume <7.5W at 3GB/s, <1W at idle, over 50% less than other market solutions. Maximize power for scientific instruments and payloads, enhancing mission efficiency.
Lower power consumption reduces heat generation, vital for missions where heat dissipation is challenging. Enhanced thermal management ensures component reliability in extreme conditions, crucial for prolonged space exploration and research.
By collaborating with top-tier NAND flash manufacturers and SSD controller creators, we have engineered a bespoke firmware architecture that seamlessly unites advanced hardware and innovative design. This empowers flash storage, providing tailored solutions for success.
Neutron Shield 2.0 offers advanced rad-hard technologies and enhanced error correction ensure data integrity. Our Dual Power Loss Protection (PLP) safeguards data during sudden power outages. Dual firmware image copies also ensure uninterrupted SSD operation, error resolution, or instances of firmware corruption.
MIL-STD-810 rated for extreme environments, the PR4 SSD is built to withstand harsh conditions. It features conformal coating to shield against moisture and particles, while underfill technology reinforces BGA connections, preventing vibration failures.
Leveraging Exascend's Adaptive Thermal Control™ and SuperCruise™ technologies, the PR4 SSD optimizes performance through intelligent thermal management and write endurance algorithms. This ensures sustainable peak performance across diverse environments.
With TCG Opal 2.0, AES-256 encryption, secure erase, pre-boot authentication (PBA), and tamper-proof firmware options, the PR4 SSD offers robust data protection, safeguarding sensitive information effectively.
Our control in hardware, firmware and manufacturing allows unmatched power tuning services. Tailoring product performance for your applications achieves optimal performance-to-thermal and performance-to-power ratios.
Exascend’s wide temperature technology leverages a unique combination of high-quality components, purpose-designed hardware and highly-optimized firmware to deliver unmatched wide temperature performance and stability.
| Edition | PR4 Series | ||
| Interface | PCIe 4.0 (NVMe 1.4) | ||
| Flash type | 176-layer 3D TLC | ||
| Form factor | M.2 (2280, 2242) | E1.S | U.2 |
| Capacity | 960GB to 7.68TB | 960GB to 7.68TB | 960GB to 15.36TB |
| Input voltage | 3.3V ±5% | 12V ±10% | |
| Power consumption | Active <8W; Idle <1W | ||
| Sequential read/write up to | 3,200/3,000 MB/s | 3,500/3,000 MB/s | |
| 4K random read/write up to | 400,000/50,000 IOPS | 500,000/55,000 IOPS | |
| Operational temperature | -40°C to 85°C | ||
| Storage temperature | -50°C to 95°C | ||
| Humidity (non-condensing) | 5–95% (Operating) | ||
| Vibration | 10 G (peak, 10–2000 Hz) | ||
| Shock | Operating: 50 G (11 ms duration, half sine wave) Non-operating: 1500 G (0.5 ms duration, half sine wave) | ||
| Features | Radiation-hardened. Advanced LDPC error correction. Firmware power loss protection. Conformal coating. Underfill. TCG Opal 2.0 / AES-256 (optional). | Radiation-hardened. Advanced LDPC error correction. Firmware & hardware power loss protection. Conformal coating. Underfill. Hot-plug capable. TCG Opal 2.0 / AES-256 (optional). | |
| TBW up to | 4,800TB | 4,800TB | 9,600TB |
| DWPD (JESD218) | 0.6 @ 3 years | ||
| MTBF | 2,000,000 hours | ||
| Warranty | 3 years | ||
Download datasheet
| Image | Model Name | Form factor | Capacity (GB) | Max. seq. read (MB/s) | Max. seq. write (MB/s) | TBW (max.) | Inquiry |
|---|---|---|---|---|---|---|---|
 | EXPR4U15360GB | U.2 | 15360 | 2800 | 2800 | 9600 | |
| EXPR4U7680GB | U.2 | 7680 | 3500 | 3000 | 4800 | |
| EXPR4U3840GB | U.2 | 3840 | 3500 | 3000 | 2400 | |
| EXPR4U1920GB | U.2 | 1920 | 3200 | 3000 | 1200 | |
| EXPR4U960GB | U.2 | 960 | 3200 | 1800 | 600 | |
 | EXPR4E7680GB | E1.S | 7680 | 3500 | 3000 | 4800 | |
| EXPR4E3840GB | E1.S | 3840 | 3500 | 3000 | 2400 | |
| EXPR4E1920GB | E1.S | 1920 | 3200 | 3000 | 1200 | |
| EXPR4E960GB | E1.S | 960 | 3200 | 1800 | 600 | |
 | EXPR4Q960GB | M.2 (2242) | 960 | 3200 | 1800 | 600 | |
| EXPR4Q1920GB | M.2 (2242) | 1920 | 3200 | 3000 | 1200 | |
 | EXPR4M7680GB | M.2 (2280) | 7680 | 2200 | 2200 | 4800 | |
| EXPR4M3840GB | M.2 (2280) | 3840 | 2800 | 2800 | 2400 | |
| EXPR4M1920GB | M.2 (2280) | 1920 | 3200 | 3000 | 1200 | |
| EXPR4M960GB | M.2 (2280) | 960 | 3200 | 1800 | 600 |
| Title | Size |
| PR4 Series NVMe SSDs flyer | 4 MB |
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