Lenovo 4XF7B08889 SR850 V4 E3.S Chassis Slide Rail

Lenovo 4XF7B08889 SR850 V4 E3.S Chassis Slide Rail

Overview

The Lenovo 4XF7B08889 is a chassis slide rail designed for the ThinkSystem SR850 V4 server platform with E3.S drive bay configuration. At 10 lb, this is a structural rack component — the kind of part that determines whether your SR850 V4 mounts cleanly in a standard rack enclosure and whether you can service the chassis without a second technician holding it in place. If you're building out or expanding an SR850 V4 deployment and the original rail kit is missing, damaged, or unaccounted for, this is the replacement part to source.

Manufactured in Mexico and distributed through major commercial channels, the 4XF7B08889 is a factory-new, genuine Lenovo component — not a third-party substitute. Using the correct OEM rail for the SR850 V4's E3.S chassis variant matters: rail geometry and latch mechanisms are platform-specific, and mismatched rails create fit problems that range from annoying (loose chassis rattle) to operationally unsafe (unsecured server in a production rack).

Key Features

• Platform-Specific Fit: Engineered for the ThinkSystem SR850 V4 with E3.S chassis — the geometry is matched to this platform, so you avoid the trial-and-error of generic rail kits that may require modification or simply won't latch correctly.
• 10 lb Component Weight: At 10 lb, this rail kit is substantial enough to confirm it includes the full sliding mechanism assembly, not just a static bracket — relevant when planning shipping logistics or rack build labor.
• Factory-New Genuine Part: Sourced through commercial distribution channels as a new component, not refurbished or pulled from a decommissioned system. For production rack builds, this matters for long-term reliability and any applicable hardware coverage.
• Mexico Manufacturing Origin: Produced in Mexico under Lenovo's manufacturing standards — consistent with the broader ThinkSystem accessory supply chain for North American enterprise deployments.

Integration and Compatibility

The 4XF7B08889 is specific to the Lenovo ThinkSystem SR850 V4 server in E3.S chassis configuration. Verify your SR850 V4 variant before ordering — Lenovo produces multiple chassis and rail SKUs for the SR850 family, and cross-variant substitution is not supported. Consult the Lenovo server accessory catalog or the SR850 V4 documentation to confirm the correct rail part number for your specific chassis revision. If you are building a multi-node SR850 V4 cluster, rails are typically sold per-chassis — order quantities accordingly. For complementary rack mounting hardware or other server accessories, confirm compatibility against your rack unit depth and rail travel specifications before combining components.

Frequently Asked Questions

Q: What server model is the 4XF7B08889 slide rail compatible with?

A: The 4XF7B08889 is designed for the Lenovo ThinkSystem SR850 V4 server with E3.S chassis configuration. It is not a universal rail and should not be used as a substitute for other SR850 variants or other ThinkSystem platforms.

Q: Is the 4XF7B08889 a new or refurbished component?

A: The 4XF7B08889 is factory-new, sourced through commercial distribution — not refurbished or pulled from existing systems.

Q: How much does the 4XF7B08889 weigh?

A: The component ships at 10 lb. Factor this into freight calculations when ordering multiple units for a rack build.

Q: Where is the 4XF7B08889 manufactured?

A: Country of origin is Mexico, consistent with Lenovo's ThinkSystem accessory production for North American commercial distribution.

James Everett

The 4XF7B08889 is one of those components that gets overlooked in procurement until it's missing from a rack build — at which point it becomes the critical path item. At 10 lb, this is the full slide rail assembly for the SR850 V4 E3.S chassis, not a static bracket, and the weight confirms you're getting the complete mechanism.

Technical Highlights:

• Platform Specificity: Engineered exclusively for the SR850 V4 E3.S chassis — rail geometry, latch engagement, and travel distance are matched to this platform, which is why substituting a generic or cross-variant rail creates fit failures in production racks.
• 10 lb Assembly Weight: The 10 lb weight is a useful proxy for assembly completeness — lightweight substitute rails frequently omit the inner slide carriage, which eliminates the tool-free serviceability that makes 2U servers maintainable without full chassis extraction.
• Mexico Origin, Commercial Channel: Manufactured in Mexico through Lenovo's standard commercial supply chain — factory-new condition, not surplus or gray market, which matters when these components go into production environments with hardware maintenance agreements.

Deployment Considerations:

• Confirm your SR850 V4 chassis variant before ordering — Lenovo uses distinct rail part numbers across chassis sub-configurations, and the E3.S designation is specific. Cross-referencing against your server's machine type and model number before purchase avoids a return cycle.
• Evidence for this SKU is limited to distribution data — for installation torque specs, rail travel dimensions, and rack compatibility (4-post vs. 2-post), consult the Lenovo ThinkSystem SR850 V4 Installation Guide directly before rack integration.

The right deployment scenario for this rail is straightforward: SR850 V4 E3.S chassis builds where the original rail kit was not included, was damaged in transit, or is being replaced as part of a data center refresh. It is not a candidate for cross-platform use.