Industrial NAND Migration: Why the Newest Technology Isn t Always the Right One
Industrial NAND migration is the process of moving the flash storage of an already-qualified system to a NAND technology that is still in production, without compromising its reliability or its validation. Industrial PCs, HMIs, edge gateways, railway and medical equipment are all concerned. With end-of-life notices now hitting SLC, MLC and BiCS3 generations, the question is landing on the desks of many design engineering teams.
Does that mean jumping straight to the latest 3D NAND? Not necessarily. Swissbit, whose products Mozaïk Storage distributes, argues for a more pragmatic approach. The goal is not to pick the newest generation available, but the storage platform best suited to the next phase of the product’s life. Here is why.
Why has industrial NAND migration become unavoidable?
The flash memory market moves at the pace of consumer electronics. Densities keep rising, architectures change and production cycles get shorter. As a result, NAND manufacturers such as Kioxia gradually phase out older generations, and module and card makers have to follow.
In practice, Swissbit announced in 2026 the end of life of several product families built on Kioxia SLC, MLC and BiCS3 components. These include SATA modules (X-60 to X-86 series), CFast cards, SD and microSD cards and U-58 eUSB modules. For several of these notices, the last time buy (LTB) date was set to 15 September 2026. Teams that have not yet started qualifying a replacement part should do so without delay.
Industrial lifecycles run on a different timeline from NAND
In industry, the calendar is different. An SSD inside an industrial PC, a kiosk or a gateway often stays in service for many years. Meanwhile, the system around it has been validated, certified and proven in the field.
Replacing the storage is therefore never a simple part swap. Several factors come into play:
- firmware and controller dependencies;
- environmental constraints (temperature, vibration, power supply);
- the application’s real write profile;
- the qualification work that has to be repeated.
“The right storage technology is not necessarily the newest one.”
Lisa Picherer, Product Manager for SATA and CFast at Swissbit
Why isn’t the newest NAND always the right choice?
Moving straight to the densest generation may seem logical. Yet such a transition often affects the controller, firmware, performance, power consumption and endurance. For a system that is already validated, introducing more change than necessary adds risk rather than reducing it.
Capacity is another point that is often overlooked. New NAND generations target ever-higher densities. However, an embedded boot drive, an HMI or a control system usually needs only a few gigabytes. Unused capacity brings no benefit: it simply adds cost to the bill of materials.
In this context, technology maturity becomes a genuine asset for a successful industrial NAND migration.
BiCS5: a bridge to current 3D NAND
BiCS (Bit Cost Scalable) is Kioxia’s family of 3D NAND flash. The BiCS3 generation stacks 64 layers of cells, while BiCS5 has 112. BiCS5 is therefore not the newest generation on the market. Its value lies elsewhere: it links established industrial designs to a current 3D NAND platform with long-term availability.
In June 2026, Swissbit began rolling out BiCS5 across a large part of its portfolio. The stated aim is to make industrial NAND migration from SLC, MLC and BiCS3 products easier, while keeping redesign and requalification effort to a minimum. The rollout covers the following interfaces:
- SATA SSDs in several form factors (2.5-inch, mSATA, M.2 SATA);
- CFast cards;
- CompactFlash cards;
- USB solutions, from embedded eUSB modules to industrial USB flash drives.
Form factors and interfaces stay the same, so mechanical and electrical integration is preserved. In addition, single-channel architectures keep low capacities available at a controlled cost, where the application does not need more.
| Swissbit range reaching end of life | NAND technology | Recommended replacement |
|---|---|---|
| eUSB U-58 | BiCS3 pSLC | U-58 BiCS5 pSLC |
| SATA modules X-60, X-66, X-75, X-76, X-86 (2.5″, slim, mSATA, M.2) | Kioxia SLC, MLC and TLC | New-generation X-73, X-75 and X-78 series |
| CFast, SD, microSD, USB | SLC, MLC, pSLC, BiCS3 | See our detailed end-of-life notices |
Endurance: aim for what you need, not the maximum
Industrial workloads vary enormously. A data logger writing continuously has nothing in common with a boot drive that is rarely written to. The right question is therefore not “which NAND offers the highest endurance?” but “how much endurance does my application actually need?”
This is where pSLC (pseudo-SLC) mode comes in. It stores only one bit per cell on NAND designed to hold several. Endurance and data retention rise sharply, at the cost of reduced capacity (divided by three on TLC NAND). In Swissbit’s BiCS5 portfolio, this mode is optional. Write-intensive applications benefit from it, while others can prioritise capacity and cost.
| Technology | Bits per cell | Typical endurance (P/E cycles) | Typical use profile |
|---|---|---|---|
| SLC | 1 | 50,000 to 100,000 | Very write-intensive, mission-critical applications |
| MLC | 2 | 3,000 to 10,000 | Mixed read/write use |
| 3D TLC (BiCS3, BiCS5) | 3 | 1,000 to 3,000 | Boot, HMI, read-mostly workloads |
| pSLC on 3D NAND | 1 | 20,000 to 30,000 | Data logging, journaling, frequent writes |
How to plan industrial NAND migration at the design stage
Migration is still too often treated as an end-of-life emergency. It is far more effective to build it into the system architecture from the start. Before selecting a part, ask yourself the following questions:
- Will a future storage generation fit into the current design?
- Can the form factor and interface stay the same?
- How much of the qualification will need to be repeated?
- How much data does the application write each day?
- Which temperature range is required: commercial (0 °C to 70 °C) or industrial (−40 °C to +85 °C)?
- For how many years must supply be guaranteed, with a fixed BOM?
Installed systems will not all evolve at the same pace. A successful technology transition must therefore offer migration paths suited to each installed base, from CompactFlash to M.2 SSDs. In industry, moving forward does not have to mean starting over.
How Mozaïk Storage supports your industrial NAND migration
As a distributor of Swissbit solutions, Mozaïk Storage supports design engineers, integrators and buyers at every stage of the migration:
- analysis of the part currently in use and its usage profile;
- a BiCS5 equivalent, with or without pSLC mode;
- samples for your qualification campaigns;
- monitoring of product change notices (PCN) and end-of-life notices, to secure your supply over the long term.
Our industrial products are built on a fixed BOM and deliver stable performance in demanding environments. A dedicated team reviews your project with you.
FAQ: industrial NAND migration
What is industrial NAND migration?
It is the move of an already-qualified industrial system’s flash storage to a NAND technology that is still in production, usually when the current generation reaches end of life. The aim is to keep the product’s reliability, form factor and interface while limiting requalification effort.
What is the difference between BiCS3 and BiCS5?
They are two generations of Kioxia 3D NAND. BiCS3 stacks 64 layers of cells, while BiCS5 has 112. BiCS5 provides a more current platform with long-term availability, while remaining compatible with established industrial form factors and interfaces.
Is pSLC mode essential?
No. pSLC mode makes sense for write-intensive applications such as data logging or journaling. For a boot drive or an HMI with few writes, a TLC configuration offers more capacity at a lower cost.
Does moving to BiCS5 mean requalifying the whole system?
Validation is still required. However, by keeping the same form factor and interface, and by choosing a range designed for continuity, the effort focuses on the storage itself. Mozaïk Storage provides samples for your tests.
What should I do if the last time buy date for my part has passed?
Contact your Mozaïk Storage representative promptly. We identify the right replacement part, check availability and arrange samples so you can start qualification without delay.
Sources: Swissbit blog, “The Newest NAND Isn’t Always the Right NAND” and “Rolling out BiCS5 across the Swissbit portfolio”, Lisa Picherer, 2026.
