This Cisco C3K-PWR-300WAC delivers Power Supplies functionality and is built for 24/7 enterprise duty cycles. Technical specifications include power of 300W. 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 C3K-PWR-300WAC 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 C3K-PWR-300WAC is a Cisco power supplies component with power 300W. Pro Disk Network sells the C3K-PWR-300WAC for $282.20 with same-day US shipping and a 30-day return guarantee.
Reviewed By
Reviewed by:Pro Disk Network Engineering Team — . Specifications, compatibility, and pricing for the C3K-PWR-300WAC are shown on this page.
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US-based LLC — 7345 W Sand Lake Rd, STE 210, Office 3208, Orlando, FL 32819
Same-Day US Shipping — orders before 3pm ET ship today via UPS
30-Day Returns — pre-paid label on DOA and defective items
Quick Answer: Will the C3K-PWR-300WAC fit my system?
The C3K-PWR-300WAC is a Cisco 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 C3K-PWR-300WAC ship?
If in stock, the C3K-PWR-300WAC ships same business day on US orders placed before 3 pm ET. Most US ZIP codes receive next-business-day or 2-day delivery via FedEx/UPS Ground or Express. Bulk and project orders shipping in pallets are typically dispatched within 24-48 hours.
The C3K-PWR-300WAC 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.
Redundant Server Power — N+1 PSU configurations in dual-feed racks — order matched units in pairs to maintain hot-spare semantics.
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.
What is the C3K-PWR-300WAC?
The C3K-PWR-300WAC is a Cisco server power supply unit with power 300W, manufactured by Cisco. 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 C3K-PWR-300WAC
Pros
Lower cost than OEM channel pricing
Matched-pair option for dual-PSU redundancy
Cons
Server-grade PSU — not for desktop or workstation use
Higher in-rush current — confirm UPS sizing
Frequently Asked Questions about C3K-PWR-300WAC
Is the C3K-PWR-300WAC a genuine Cisco part?
Yes. Pro Disk Network sources every C3K-PWR-300WAC as factory-original Cisco inventory. New units arrive sealed in OEM packaging; refurbished units are pulled from decommissioned Cisco servers, surface-tested, and re-warranted by Pro Disk Network for 90 days.
Will the C3K-PWR-300WAC fit my system?
The C3K-PWR-300WAC is a Cisco 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 C3K-PWR-300WAC ship?
If in stock, the C3K-PWR-300WAC ships same business day on US orders placed before 3 pm ET. Most US ZIP codes receive next-business-day or 2-day delivery via FedEx/UPS Ground or Express. Bulk and project orders shipping in pallets are typically dispatched within 24-48 hours.
What is the warranty on the C3K-PWR-300WAC?
New C3K-PWR-300WAC units carry the full Cisco 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 C3K-PWR-300WAC?
Email sales@prodisknetwork.com with the quantity and target ship date for a quote within one business day.
Other parts that share the C3K series prefix — useful when sourcing matched lots, hot-spare pools, or capacity-tier expansions.
C3K-PWR-1150WAC — C3K-PWR-1150WAC - Cisco 1150W AC Power Supply — $3,292.83
C3K-PWR-1150WAC-RF — C3K-PWR-1150WAC-RF - Cisco 1150-Watts 110-220V AC Power Supply for Cisco Catalyst 3750-E PoE Series switch — $228.93
C3K-PWR-265WAC — C3K-PWR-265WAC - Cisco 265-Watts AC Power for Catalyst 3750-E / 3560-E — $208.42
C3K-PWR-750WAC — C3K-PWR-750WAC - Cisco 750W AC Power Supply — $344.33
Pro Disk Network Buyer’s Guide: Power Supplies
PSU Sizing: Connected Load, Efficiency Curves, and N+1 Redundancy
Sizing the C3K-PWR-300WAC or its replacement starts with calculating connected load. Add up the nameplate wattage of CPUs, GPUs, drives, fans, and add-in cards under maximum sustained load. Idle is irrelevant; peak sustained is what matters. Size the PSU at 60-80% of nameplate load for best efficiency — modern Platinum/Titanium PSUs hit peak efficiency at 50% load and degrade above 80%.
AC Input, Phase Balancing, and Datacentre Power Best Practices
For UPS-fed servers, confirm the UPS output waveform is compatible with the C3K-PWR-300WAC's input. Modern PSUs accept both sine-wave and high-quality simulated sine-wave inputs, but older or stepped-approximation UPS outputs can cause buzzing or premature PSU failure. When in doubt, use double-conversion online UPS units.