Dell part number 450-18505 identifies the 450-18505 - Dell 750-Watts Redundant Power Supply for PowerEdge R820 R720 R720XD, an enterprise-grade Power Supplies unit appropriate for data-center, server-room, and workstation deployment. Technical specifications include power of 750W, features of Redundant. Typical use cases include in-place upgrades, EOL replacement under existing OEM service contracts, lab/test environments, and refurbished-rebuild programs. Pro Disk Network supplies the 450-18505 to US business buyers. Stocked units ship same-day on in-stock orders placed before 3pm ET. Pro Disk Network applies a 90-day functional warranty. Free US ground shipping on orders over $150; same-day expedited (UPS Next Day Air, FedEx Priority) available at checkout.
The 450-18505 is a Dell power supplies component with power 750W, features Redundant. Pricing on the 450-18505 is quote-based — email sales@prodisknetwork.com or use our live chat for a quote within one business day.
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Reviewed by:Pro Disk Network Engineering Team — . Specifications, compatibility, and pricing for the 450-18505 are shown on this page.
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Same-Day US Shipping — orders before 3pm ET ship today via UPS
30-Day Returns — pre-paid label on DOA and defective items
The 450-18505 is a Dell power supplies part. Email sales@prodisknetwork.com with your system make, model, and serial number - we will confirm compatibility and ship same-day if in stock.
How fast does the 450-18505 ship?
450-18505 orders placed before 3 pm ET ship the same business day from US warehouses. Delivery is next business day to most metro ZIPs via FedEx/UPS overnight; ground delivery covers remaining US in 1-4 business days.
The 450-18505 is deployed by US enterprises, MSPs, government, and education customers across multiple infrastructure scenarios. Below are the most common deployment patterns Pro Disk Network sees in real-world orders.
Rack PDU Replacement — Vertical or horizontal PDUs in cabinet retrofits. Metered or switched models for granular outlet-level control.
Branch UPS — Office or remote site UPS. 1500–3000 VA covers most server-rack mini-deployments with 5–15 minute runtime.
Datacenter UPS Module — Online double-conversion UPS for production server rooms. Match VA rating to total connected load + 30% headroom.
Telco / Battery Backup — DC-powered batteries for telco-class equipment, ISP CPE, and outdoor cabinets. Confirm voltage (-48 V vs +12/24 V).
What is the 450-18505?
The 450-18505 is a Dell server power supply unit with power 750W and features Redundant, manufactured by Dell. Pro Disk Network ships this part new and certified-refurbished from our US warehouse with same-day dispatch on orders placed before 3 PM ET, backed by a 30-day return guarantee.
Pros & Cons of 450-18505
Pros
Same-day US shipping reduces production downtime
Cons
Wattage headroom should be sized at 70-80% sustained load
Cable harness sold separately on certain chassis
OEM warranty does not transfer with refurbished units
Frequently Asked Questions about 450-18505
Is the 450-18505 a genuine Dell part?
Yes. Pro Disk Network sources every 450-18505 as factory-original Dell inventory. New units arrive sealed in OEM packaging; refurbished units are pulled from decommissioned Dell servers, surface-tested, and re-warranted by Pro Disk Network for 90 days.
Will the 450-18505 fit my system?
The 450-18505 is a Dell power supplies part. Email sales@prodisknetwork.com with your system make, model, and serial number - we will confirm compatibility and ship same-day if in stock.
How fast does the 450-18505 ship?
450-18505 orders placed before 3 pm ET ship the same business day from US warehouses. Delivery is next business day to most metro ZIPs via FedEx/UPS overnight; ground delivery covers remaining US in 1-4 business days.
What is the warranty on the 450-18505?
New 450-18505 units carry the full Dell manufacturer warranty (typically 1 to 5 years depending on product line). Refurbished and bulk-OEM units include a Pro Disk Network advance-replacement warranty (90 days refurbished). DOA replacement is free within 30 days of receipt.
Do you offer bulk pricing for the 450-18505?
Email sales@prodisknetwork.com with the quantity and target ship date for a quote within one business day.
Other parts that share the 450 series prefix — useful when sourcing matched lots, hot-spare pools, or capacity-tier expansions.
450-18109 — 450-18109 - Dell 1100-Watts Single Hot Pluggable Power Supply for Poweredge R620 — $133.21
450-18113 — 450-18113 - Dell 495-Watts Hot-plug Power Supply for PowerEdge R520 R620 R720 R720XD T320 T420 T620 — $49.60
450-18115 — 450-18115 - Dell 750-Watts Power Supply for PowerEdge R520 R620 R720 R820 — $161.99
450-18454 — 450-18454 - Dell 350-Watts Redundant Power Supply for PowerEdge R320 R420 — $36.00
450-18501 — 450-18501 - Dell 495-Watts Power Supply for PowerEdge R720 T320 — $49.60
450-18504 — 450-18504 - Dell 750-Watts Hot Swappable Power Supply for PowerEdge R720 R520 — $38.40
Pro Disk Network Buyer’s Guide: Power Supplies
PSU Sizing: Connected Load, Efficiency Curves, and N+1 Redundancy
For N+1 redundancy in a dual-PSU server, both PSUs must be rated to handle full load alone. This is non-negotiable in production: if a single PSU fails and the surviving one is undersized, the system shuts down. The 450-18505 should be matched in wattage rating to the partner PSU in the chassis; mismatched ratings sometimes work but trigger warnings in the BMC.
AC Input, Phase Balancing, and Datacentre Power Best Practices
Document the 450-18505 model, wattage, and partner PSU in your CMDB. Power audits typically find one or two undersized servers and one or two over-redundant clusters per rack — both of which waste capacity that could feed additional production load.