The Dell 450-18800 (450-18800 - Dell 750-Watts Redundant Power Supply for PowerEdge R820 R720 R720XD) is a Power Supplies component engineered for sustained enterprise-class workloads. This part addresses common procurement scenarios where exact-match replacement, capacity expansion, or new-build deployment is required. Technical specifications include power of 750W, features of Redundant. Common deployment scenarios include enterprise data-center, server-room, and managed-service-provider environments where matched-OEM-part procurement is required for warranty and compliance continuity. Pro Disk Network sources the 450-18800 through reputable distribution channels and applies a verification check against the OEM compatibility matrix before each unit is added to active inventory. Each unit ships from a US fulfillment hub (Hillsboro OR, Atlanta GA, or Phoenix AZ) with same-day dispatch on in-stock orders before 3pm ET. 90-day Pro Disk Network functional warranty included; free US ground shipping on orders over $150.
The 450-18800 is a Dell power supplies component with power 750W, features Redundant. Pricing on the 450-18800 is quote-based — email sales@prodisknetwork.com or use our live chat for a quote within one business day.
Reviewed By
Reviewed by:Pro Disk Network Engineering Team — . Specifications, compatibility, and pricing for the 450-18800 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 450-18800 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 450-18800 ship?
Pro Disk Network dispatches the 450-18800 same-day on orders confirmed before 3 pm ET. Multi-pallet projects requiring crating ship within 2 business days. International shipping (Canada, Mexico, EU, APAC) takes 3-7 business days via DHL Express or FedEx International Priority.
The 450-18800 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.
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 450-18800?
The 450-18800 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 450-18800
Pros
Lower cost than OEM channel pricing
Matched-pair option for dual-PSU redundancy
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 450-18800
Is the 450-18800 a genuine Dell part?
Yes. Pro Disk Network sources every 450-18800 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 450-18800 fit my system?
The 450-18800 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 450-18800 ship?
Pro Disk Network dispatches the 450-18800 same-day on orders confirmed before 3 pm ET. Multi-pallet projects requiring crating ship within 2 business days. International shipping (Canada, Mexico, EU, APAC) takes 3-7 business days via DHL Express or FedEx International Priority.
What is the warranty on the 450-18800?
New 450-18800 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 450-18800?
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 racks with shared PDUs, plan PDU capacity at 80% of breaker rating, not 100%. A 30A PDU should carry no more than 24A sustained. Distribute high-power chassis across multiple PDUs in dual-feed racks so a single PDU failure does not exceed the survivor's headroom.
AC Input, Phase Balancing, and Datacentre Power Best Practices
The 450-18800 accepts a defined AC voltage range, typically 100-240V or 200-240V for high-output server PSUs. Higher voltage = higher efficiency: a server PSU at 240V input runs 1-2% more efficient than the same PSU at 120V. In datacentres with 208V three-phase, balance loads across the three phases to avoid neutral saturation and reduce harmonic distortion on the upstream UPS.