Lenovo 4C57A82405 ST650 V3 2.5IN Sas/sata 8-BAY BP KIT

Lenovo 4C57A82405 ST650 V3 2.5-Inch 8-Bay SAS/SATA Backplane Kit

Overview

The Lenovo 4C57A82405 is an 8-bay 2.5-inch SAS/SATA backplane kit designed to expand drive capacity within the ThinkSystem ST650 V3 tower server. If you're building out or upgrading a ST650 V3 and need to add a dedicated 2.5-inch drive bay assembly — whether for SAS HDDs, SATA SSDs, or a mix of both — this kit installs directly into the chassis without improvised hardware. Dual-interface support (SAS and SATA) gives you flexibility to populate with whatever drive tier the workload demands, from high-throughput SAS spindles to cost-effective SATA flash.

Compatibility

Verified for the Lenovo ThinkSystem ST650 V3 tower server. This backplane kit is platform-specific — it is not a universal fit for other ST-series generations (ST550, ST650 V2) or rack-mount ThinkSystem models. Confirm your chassis generation before ordering. SAS and SATA drive interfaces are both supported, allowing mixed drive populations within the same bay assembly. Compatible with standard 2.5-inch SFF enterprise drives used across the server storage components category.

Installation Notes

At 1.80 lb and 7.00 × 5.00 × 8.00 in, the backplane assembly is a discrete chassis subcomponent — plan for the physical clearance required inside the ST650 V3 bay during installation. Follow Lenovo's ST650 V3 hardware maintenance documentation for proper backplane seating, cable routing to the RAID/HBA controller, and any torque requirements on retention hardware. No tools beyond standard server-maintenance kit are implied by the available evidence.