0TS1925: Western Digital Ultrastar DC SN640 1.92TB PCIe Gen3 NVMe U.2 2.5-Inch Enterprise SSD
Also listed as: WUS4BB019D7P3E3, Ultrastar DC SN640 1.92TB U.2, 0TS1926 · made by Western Digital
The Western Digital Ultrastar DC SN640 1.92TB is a popular enterprise PCIe Gen3 x4 NVMe solid state drive built on 96-layer BiCS4 3D TLC NAND. Designed for cloud hosting, SQL virtualization, and container infrastructure, it reaches 3,100 MB/s sequential read and up to 470,000 random read IOPS with an efficient 12W active power profile. Secondary market buyers should verify remaining write life with nvme-cli, verify that the 7mm casing has not been flexed, and confirm that the drive is not locked by Dell/HPE OEM firmware.
Specifications
| Part number | 0TS1925 |
|---|---|
| Brand | Western Digital |
| Made by | Western Digital |
| Type | SSDs |
| Other numbers | WUS4BB019D7P3E3, Ultrastar DC SN640 1.92TB U.2, 0TS1926 |
| Status | end of sale |
| Capacity (GB) | 1,920 |
| Interface | NVMe PCIe Gen3 U.2 |
| Form factor | SFF 2.5in, U.2 7mm |
| Endurance | Read Intensive, 0.8 DWPD |
| Generation fit | PCIe Gen3 and Gen4 server backplanes with U.2 slots |
About the 0TS1925
0TS1925 is Western Digital's 1.92TB read-intensive enterprise PCIe Gen3 x4 NVMe solid state drive in the Ultrastar DC SN640 product family, model WUS4BB019D7P3E3. Built with 96-layer BiCS4 3D TLC NAND in a 2.5-inch 7mm U.2 form factor, it delivers 3,100 MB/s sequential read and up to 470,000 random read IOPS with an efficient 12W active power profile. It served as a high-volume Gen3 NVMe workhorse for cloud hosting and SQL virtualization.
Compatibility
Fits 2.5-inch U.2 PCIe NVMe server drive bays in Dell PowerEdge 14G/15G, HPE Gen10, and Lenovo ThinkSystem V1/V2 servers. It will not operate in SATA-only or SAS-only bays. Backward compatible with PCIe Gen2 and Gen1 slots. Its 7mm profile fits thin 1U server drive cages.
How to identify a genuine unit
The top label displays Western Digital Ultrastar DC SN640 branding with model WUS4BB019D7P3E3, part number 0TS1925, and 1.92TB NVMe PCIe 3.1 x4. In system inventories, nvme list identifies the drive as WUS4BB019D7P3E3. OEM versions carry Dell (400-BDUQ) firmware.
Buying used
Query nvme smart-log to inspect remaining percentage life, available spare blocks, and total host writes. Units pulled from cloud hosting servers often retain over 80 percent of write endurance. Confirm that the drive does not carry an active TCG Opal security lock.
Reference prices (last 14 days, updated 2026-10-27)
New: USD 185 (1 sighting, Oct 2026)
Used: USD 115 (1 sighting, Oct 2026)
All sightings
| Seller | Condition | Price | Note | Seen |
|---|---|---|---|---|
| serversupply.com | new | USD 185 | 2026-10-27 | |
| ebay.com | used | USD 115 | 2026-10-27 |
Prices seen on public listings on the dates shown, before tax and shipping. Not an offer.
Fits these models
Equivalent part numbers
- Dell 400-BDUQ Dell 1.92TB NVMe SN640 SSD
FAQ
What interface does the SN640 use?
PCIe 3.1 x4 with NVMe 1.3 protocol compliance.
What is the endurance rating of the 1.92TB SN640?
0.8 DWPD over 5 years (approx 2.8 PBW).
Buying or selling 0TS1925?
New, refurbished or used. Tell us the quantity and condition and we connect you with a vetted reseller in your region, usually within one working day.
Sources
- Ultrastar DC SN640 NVMe SSD Product Brief, checked 2026-10-27