Lenovo 4XH7B03843 SR650 V4 4X2.5IN NVME MID BP Option KIT

Lenovo 4XH7B03843 SR650 V4 NVMe Mid Backplane Option Kit

Overview

The Lenovo 4XH7B03843 is a 4x2.5-inch NVMe mid backplane option kit designed for the ThinkSystem SR650 V4 rack server. Installing this kit adds a mid-bay NVMe drive cage, letting you expand internal all-flash storage capacity without replacing the base server chassis — a practical path when your workload grows beyond the factory bay count. The NVMe interface means each drive slot connects at full PCIe speeds, keeping storage throughput in line with what modern compute workloads and high-density NVR or data-intensive applications demand. This kit ships from Mexico (country of origin: MX) and falls under UNSPSC 43211600 (server storage components).

Compatibility

This kit is designed specifically for the Lenovo ThinkSystem SR650 V4. It is not interchangeable with SR650 V2/V3 or other SR-series chassis — backplane keying and mid-bay mounting geometry are generation-specific. Before ordering, confirm your SR650 chassis is the V4 revision and that the target mid-bay slot is unpopulated; installing into an already-occupied bay requires removing the existing backplane assembly. Pair with compatible 2.5-inch NVMe U.2 or U.3 drives that appear on Lenovo's SR650 V4 ServerProven list — drives not on that list may enumerate but are unsupported under warranty. For PoE-driven edge deployments feeding an SR650 V4, consider validating your PoE switch and NVR storage architecture against the expanded bay count this kit enables.

Installation Notes

This kit weighs 10 lb — account for that when planning rail-slide clearance and service access in a populated rack. Installation requires powering down the server and following Lenovo's SR650 V4 hardware maintenance guide for mid-bay backplane replacement; no hot-swap procedure is supported during backplane installation itself. Ensure the server's PCIe riser and NVMe cable routing can support the additional backplane before committing to the upgrade — cable kits may be sold separately depending on base server configuration.