Keeping IT systems reliable means having the right parts ready when needed. Field Replaceable Units (FRUs) let technicians replace faulty components on-site, reducing downtime and costs. At Renewtech, we supply certified refurbished FRUs across the UK and Europe to keep your infrastructure running smoothly and sustainably.
What Is a Field Replaceable Unit (FRU)?
A Field Replaceable Unit (FRU) is any hardware component that can be replaced directly by a technician without sending the system back to the manufacturer. In most modern servers, almost every removable part — from fans and drives to power supplies and system boards — is classified as a FRU.
Each part carries a unique FRU number that identifies the exact model and ensures compatibility during maintenance or repair. This modular design keeps IT systems reliable, flexible, and efficient, allowing businesses to replace only the parts that need attention instead of entire systems.
At Renewtech, FRUs are part of our daily operations — they represent the practical foundation of how companies can maintain, extend, and optimise their hardware. Every refurbished server and component we supply is made up of verified FRUs, tested to meet manufacturer standards. By reusing quality FRUs, we help businesses reduce costs, minimise downtime, and support sustainability across their infrastructure.
The Role of FRUs in Server Maintenance and Lifecycle Management
Every modern server, storage system, or network device is built from a collection of Field Replaceable Units. These modular components are designed to be removed and replaced individually, enabling technicians to service equipment quickly without needing to send entire systems for repair.
Because nearly every part inside a server — from drives and fans to processors, DIMMs, and system boards — is a FRU, maintenance becomes a modular process. A single component can be swapped without disturbing the rest of the configuration, keeping business operations online and minimising downtime.
In UK data centres and enterprise environments, this approach is essential. Instead of waiting for vendor service or replacing full systems, IT teams can target specific FRUs that need attention, saving both time and resources.
At Renewtech, we base our entire refurbishment process on this principle. Each refurbished server and spare part we supply consists of genuine manufacturer FRUs, thoroughly tested and verified to perform as intended. It’s how we help companies maintain stable, efficient, and sustainable IT environments across the UK and Europe.
How to Identify the Right FRU for Your Server
Every manufacturer labels Field Replaceable Units differently, which can make it tricky to identify the correct part number. Whether you’re replacing a failed component or planning an upgrade, the FRU number is your key to finding the exact compatible part.
Below you’ll find examples for the most common brands we work with — including how to recognize their labels and what typical part codes look like.
| Brand | Typical label on part | Common FRU/part code patterns (examples) | Notes |
| Dell / Dell EMC | DP/N, FRU P/N, Dell Part | 400-AXSD, 450-AIQX, 403-BCPG, 118000653 | Found on servers, storage, and networking parts. Dell and Dell EMC use the same numbering format. |
| HPE (Hewlett Packard Enterprise) | Spare Part No., FRU Number | 708046-001, 727260-002, 660093-001 | Newer servers show HPE; older parts may still say HP. |
| Lenovo | FRU P/N | 00YK016, 01KR355, 01KP357 | Clearly printed on drives, boards, and adapters. |
| IBM | FRU P/N | 00Y4643, 49Y7962, 46W0831 | Used across legacy System x and BladeCenter hardware. |
| NetApp | X-Part, sometimes FRU | X477A-R6, X343A-R6, 111-xxx-xxx | NetApp uses its own X-Part numbering for storage FRUs. |
| Cisco (incl. UCS) | PID, sometimes FRU ID | UCS-MR-X32G2RS-H, 403-BCPE, J9850A | FRUs often searchable by Product ID (PID) in UCS Manager. |
| Fujitsu | FRU No., Spare | CA06531-B120, S26361-F5531-L590 | Labels vary slightly; usually near barcodes on modules. |
| Supermicro | FRU or board sticker | CSE-847-…, X10DRI-…, PSU labels | Printed directly on the chassis or PSU; formatting varies. |
| Seagate | Drive label model + OEM FRU | ST4000NM019B, ST8000NM0075 | Drive FRUs usually reference the OEM (Dell, HPE, Lenovo). |
| Arista | P/N, Spare | 10-xxxx, 57-1000333-01 | FRU label appears on optics, PSUs, and fans. |
| Brocade | P/N, Spare | 57-0000088-01, 57-1000117-01 | Found on switches, transceivers, and SFPs. |
| Juniper | P/N, Optic label | FTLX8574D3BNL-E5, PWR-66W-AC-V2 | Optical modules and PSUs follow standard MSA labeling. |
| Intel | P/N, Adapter Label | E10G42BTDA, X520-DA2 | CPUs and NICs may also have OEM FRUs assigned by Dell or HPE. |
| NVIDIA | P/N, Adapter Label | 900-21001-0020-100, 900-21010-0000-000 | GPUs often carry OEM-assigned FRUs when used in servers. |
| AMD | P/N, Adapter Label | 100-532-600-00, 100-564-599-00 | CPU and GPU parts are linked to OEM FRUs for server compatibility. |
If you already know your FRU number, you can use it to identify the matching part — but you don’t need it. With our Server Configurator, all you have to do is select your brand and server model. The tool automatically displays every compatible part we currently have in stock — including CPUs, memory, drives, and power supplies.
This way, you’ll only see tested, compatible FRUs that fit your exact system. No need to cross-reference manuals or part lists — just choose your model and configure or repair your server with complete confidence. Whether you’re upgrading performance, replacing a faulty component, or planning maintenance, the configurator ensures you get the right parts every time — quickly and reliably.
Avoid Compatibility Issues — Use our Server Configurator
Use our Server Configurator to find only the parts that fit your system — no guesswork, no compatibility issues. Select your brand and server model, and instantly see every compatible CPU, memory module, drive, or power supply we have in stock.
Why Field Replaceable Units Are Important for IT Operations
Because most hardware components are FRUs, they play a central role in every maintenance and lifecycle strategy. Having access to compatible FRUs means technicians can perform fast, reliable replacements without depending on OEM repair cycles or long lead times.
Here’s why FRUs are essential to modern IT:
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Reduced downtime: Faulty modules — whether fans, drives, or controllers — can be replaced immediately with matching FRUs.
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Lower costs: Replacing a single FRU avoids unnecessary full-system purchases.
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Simplified logistics: Stocking key FRUs ensures fast local response to hardware failures.
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Extended system life: Replacing or upgrading FRUs extends the lifespan of entire platforms.
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Consistent performance: Using genuine FRUs ensures full compatibility and reliability.
For organizations supported by Renewtech, these benefits extend even further through Renewcare, our Third Party Maintenance service. Renewcare ensures that tested FRUs are always available as part of a structured, cost-efficient maintenance plan — with local EU and UK logistics support.
Refurbished FRUs: A Sustainable and Cost-Effective Choice
Since nearly all components within enterprise hardware are FRUs, refurbishment plays a vital role in extending their lifecycle. Refurbished FRUs are tested, revalidated, and reintroduced into service, offering the same function and compatibility as new parts — but at significantly lower cost and environmental impact.
At Renewtech, each FRU we handle — from processors and memory modules to power supplies and system boards — is individually tested by certified technicians before being approved for reuse. This ensures reliability while promoting responsible resource use.
The benefits include:
✓ Up to 80% cost savings compared to new OEM components.
✓ Lower environmental impact, with fewer parts discarded as waste.
✓ Reduced emissions, supporting sustainability goals.
✓ Proven reliability, with all FRUs tested and validated before shipment.
By reusing and reselling verified FRUs, Renewtech supports a circular hardware economy — helping UK organisations balance cost, performance, and sustainability in their IT operations.
Need Help Finding the Right FRU or Compatible Part? We Can Help
Choosing the correct part for your server can be time-consuming — especially with different generations, configurations, and FRU numbers. That’s why our Server Configurator does the work for you.
At Renewtech, we specialize in tested, refurbished Field Replaceable Units (FRUs) that match your exact server model. Simply select your brand and server, and the server configurator will display every compatible CPU, memory module, drive, and power supply currently in stock.
✓ Guaranteed compatibility – Only compatible parts are shown for your chosen server.
✓ Certified quality – Every FRU is tested by certified technicians before shipping.
✓ Fast UK delivery – We offer fast, secure, and blind shipping directly to your customers.
✓ Sustainable solution – Extend your hardware’s lifespan while reducing e-waste.
Not sure where to start? Our specialists are ready to help you select the right components or assist with larger configurations.
Contact our team today or use the Server Configurator to see all available parts for your systems.