Sourced for enterprise IT teams managing Cisco UCS C-Series and B-Series blade chassis, plus Catalyst and Nexus switching platforms, the Cisco PWR-MS320-640WAC (PWR-MS320-640WAC - Cisco 640-Watts Switching Power Supply For Meraki Ms320-48f) is a Power Supplies & Power Protection component matched to OEM specifications. Each unit is verified against manufacturer datasheet revisions and is appropriate for new-build, expansion, or warranty-replacement procurement. Technical specifications include power of 640W. Typical use cases include in-place upgrades, EOL replacement under existing OEM service contracts, lab/test environments, and refurbished-rebuild programs. Our procurement team maintains active inventory of the PWR-MS320-640WAC and verifies condition, firmware revision, and OEM part-number registry alignment for each unit prior to sale. Stocked units ship same-day on in-stock orders placed before 3pm ET. Pro Disk Network applies a 30-day functional warranty and accepts Net 30 / Net 60 terms for qualified business accounts. Free US ground shipping on orders over $150; same-day expedited (UPS Next Day Air, FedEx Priority) available at checkout.
The PWR-MS320-640WAC is a Cisco power supplies & power protection component with power 640W. Pro Disk Network sells the PWR-MS320-640WAC for $467.57 with same-day US shipping and a 30-day free return guarantee.
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Reviewed by:Pro Disk Network Engineering Team — . Specifications, compatibility, and pricing for the PWR-MS320-640WAC verified against the manufacturer datasheet and our internal lab benchmarks.
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Florida-Registered LLC — 7345 W Sand Lake Rd, Orlando FL 32819
Same-Day US Shipping — orders before 3pm ET ship today via FedEx/UPS
30-Day Free Returns — pre-paid label included on all US orders
Net 30 Available — for verified business buyers
2,000+ B2B Customers — MSPs, government, education, enterprise IT
Quick Answer: Will the PWR-MS320-640WAC fit my system?
The PWR-MS320-640WAC is a Cisco power supplies & power protection 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 PWR-MS320-640WAC ship?
If in stock, the PWR-MS320-640WAC ships same business day on US orders placed before 2 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 PWR-MS320-640WAC 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.
New, Bulk, or Refurbished — Choosing Your Tier
Pro Disk Network offers the PWR-MS320-640WAC across three procurement tiers. Each tier is fully functional and warranted; the choice comes down to budget, warranty length, and whether the deployment is production-critical or capacity-expansion.
Tier
Discount vs OEM List
Warranty
Best For
New (Sealed OEM)
25–40%
Cisco manufacturer warranty (1–5 yr)
Production-critical first-tier
New (Bulk OEM)
50–65%
3-year Pro Disk Network warranty
New cluster builds, secondary tier
Refurbished
75–85%
12-month advance replacement
Capacity expansion, lab, dev/test, EOL refresh
Bulk & Volume Pricing for PWR-MS320-640WAC
Ships from our Orlando, FL warehouse — same-day US dispatch on orders placed before 2pm ET. Net 30 terms available for verified businesses, government and education.
Volume discounts on the PWR-MS320-640WAC are automatic at checkout. Net 30 terms available for verified businesses, government, and education. Email sales@prodisknetwork.com for orders above 100 units.
Quantity
Discount
Unit Price
1
0%
$467.57
5+
4%
$448.87
10+
8%
$430.16
25+
13%
$406.79
50+
18%
$383.41
100+
23%
$360.03
What is the PWR-MS320-640WAC?
The PWR-MS320-640WAC is a Cisco server power supply unit with power 640W, 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 PWR-MS320-640WAC
Pros
Hot-swap capable — no chassis power-cycle required
Redundant N+1 configuration support
Output rail efficiency verified at 50% load
Cons
Refurbished tier may show minor chassis-slot wear
Larger orders may ship LTL freight
Older form factors deprecated by latest chassis revisions
Frequently Asked Questions about PWR-MS320-640WAC
Is the PWR-MS320-640WAC a genuine Cisco part?
Yes. Pro Disk Network sources every PWR-MS320-640WAC as factory-original Cisco inventory verified against the manufacturer parts registry before listing. 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 12 months.
Will the PWR-MS320-640WAC fit my system?
The PWR-MS320-640WAC is a Cisco power supplies & power protection 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 PWR-MS320-640WAC ship?
If in stock, the PWR-MS320-640WAC ships same business day on US orders placed before 2 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 PWR-MS320-640WAC?
New PWR-MS320-640WAC 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 (12 months refurbished, 36 months new bulk). DOA replacement is free within 30 days of receipt.
Do you offer bulk pricing for the PWR-MS320-640WAC?
Yes. Pro Disk Network offers automatic volume discounts at 10, 25, 50, and 100+ unit tiers. Net 30 terms are available for verified businesses, government, and education buyers. Email sales@prodisknetwork.com with the quantity and target ship date for a quote within one business day.
Other parts that share the PWR series prefix — useful when sourcing matched lots, hot-spare pools, or capacity-tier expansions.
PWR-MS320-1025WAC — PWR-MS320-1025WAC - Cisco Meraki 10255-Watts Power Supply For MS420 Meraki Switches — $344.84
PWR-MS320-250WAC — PWR-MS320-250WAC - Cisco Meraki Power Supply 250-Watts For MS320 Meraki Switches — $392.99
PWR-MS420-400AC-R — PWR-MS420-400AC-R - Cisco Meraki 400-Watts Power Supply For MS420 Meraki Switches — $299.13
Pro Disk Network Buyer’s Guide: Power Supplies & Power Protection
PSU Sizing: Connected Load, Efficiency Curves, and N+1 Redundancy
Sizing the PWR-MS320-640WAC 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 PWR-MS320-640WAC'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.