4 9U racks tracked right now, from $307.99. A 9U budget holds 9 rack units of height - what actually fits depends on every device's own vendor-stated RU size, computed below rather than assumed.
Prices updated · live figures update every 4-5 hours
What fits in 9U, computed from vendor-stated sizes
A common rack chassis size is 1U or 2U (the site-wide convention for server chassis height), and a PDU is either 0U (mounts vertically, uses no horizontal rail space) or 1U (uses one). Two disk shelves in our JBOD cluster carry a vendor-sourced rack-unit figure: NetApp DS4246 at 4U and NetApp DS2246 at 2U. One example: two 2U servers (4U) plus a DS4246 (4U) plus a 1U PDU comes to 9U of a 9U budget, leaving 0U spare.
We do not have a vendor-stated rack-unit figure for switches or for most UPS units in our catalogue (UPS listings state tower-vs-rackmount form but not a specific RU height) - budget extra space for those rather than assuming they add zero.
A complete 9U build, priced live
9U rack + basic PDU + rackmount UPS
$704.39
Rack, PDU and UPS only - no rail kit, because rail compatibility is server-generation-specific and this page cannot assume which server you're racking. See /rack/mounting for exact rail fits. This total is a sum of live prices, not of power ratings - it does not tell you whether the UPS and PDU together cover what you plan to plug into them. 3 items across 3 listings. In-stock listings only. Anything out of stock when this page loaded is named below rather than silently dropped.
These are our current tracked prices. Amazon sets the seller and the final price at checkout - verify before you buy. Opening any item starts an Amazon session, and anything you add there is part of the same order - you do not need to come back here between items.
Choosing a 9U rack specifically
9U sits where it does in our catalogue because that's where at least three verified listings across our tracked brands cluster - it is a genuinely common size, not an arbitrary cutoff we chose. Both open-frame and enclosed options exist at this size in what we track; check the live table above for the current split.
The same open-frame-vs-enclosed and 2-post-vs-4-post decisions covered on the rack hub apply at this size exactly as they do at any other - size does not change which structural class is right for your equipment, only how much of it you can fit.
9 at most by height alone, but that ignores everything else that needs space - a PDU (0U mounts vertically and costs nothing; 1U takes a rack unit), a UPS if it's rack-mount, and any disk shelf, which can be several RU tall. Budget for those before assuming the full 9U is available for servers.
Can a disk shelf fit in a 9U rack?
Depends on the shelf - our disk shelf cluster tracks two models with a vendor-stated rack unit figure: NetApp's DS4246 at 4U and DS2246 at 2U. Three other tracked models have no sourced RU figure and render as unverified rather than a guessed height. Check the specific shelf's own page before assuming it fits.
Does a 0U PDU use up rack space?
No - a 0U PDU mounts vertically along the side of the rack, outside the horizontal rail space that RU height measures. A 1U PDU mounts horizontally and does consume one rack unit. Our PDU table states which form factor each unit is where the listing specifies one.
What's the honest complete-rack cost, not just the empty rack?
See the basket below - it prices the cheapest rack at this size plus a basic PDU plus a rackmount UPS, all live, all nameplate-labelled where relevant. We do not add a rail kit to this total because rail compatibility is server-generation-specific (see /rack/mounting and the rail pages) and a generic size page cannot assume which server you're racking.
Is a 9U rack usually open frame or enclosed?
Check the live table above - both exist at most sizes we track, and the split varies by size. Open frame is generally cheaper and better ventilated; enclosed adds security and dust containment. See the rack hub for the full comparison.
What load can this rack actually hold?
Only where the maker states a figure - we sourced a static load rating for exactly one tracked model (see the rack hub's sourcing note). Most listings in this size do not state a load rating in the title, and we do not estimate one from a similar model.
Sources
Specification claims on this page were checked against the pages below on 4 August 2026. Where a widely-repeated figure did not survive that check, we report what the source says now and say so in the text rather than repeating the familiar number.
Used for: APC's own published figures for this specific, discontinued PDU: "Input current limits: 20 A" and "Line Rated Current: 16 A" - both quoted verbatim from the datasheet. Also "Input Connection Type: NEMA L5-20P" and "Number of power socket outlets: 24 NEMA 5-20R," the exact plug and outlet facts for this model.
Used for: The same two figures on APC's CURRENTLY SOLD replacement model: "Input current limits: 20 A" and "Line Rated Current: 16 A" - confirming the pattern is not specific to one discontinued part number. Also "Product availability: Stock - Normally stocked in distribution facility," confirming this model is not discontinued.
Used for: quoted verbatim: "Compared to the 5-15P plug, the 5-20P plug has the neutral blade rotated 90° and shifted..." and "The 5-20R receptacle has a T-shaped neutral hole, to accept both 5-15P and 5-20P plugs" - the mechanical basis for why a 5-15P plug fits a 5-20R receptacle but a 5-20P plug does not fit a plain 5-15R receptacle. The same rotated-blade relationship is confirmed for the NEMA 6 (240V) family between 6-15 and 6-20. The article itself cites the dimensional standard, ANSI/NEMA WD 6-2016.
Used for: quoted verbatim: C13/C14 rated "Max. current (A): 10" with "Pin spacing, centres (mm): 14 (H) / 4 (V)"; C19/C20 rated "Max. current (A): 16" with "Pin spacing, centres (mm): 13 (H) / 8 (V)" - different physical pin spacing at different amperages. Also quoted verbatim, the standard's own design principle: "The shape and dimensions of appliance inlets and connectors are coordinated so that a connector with lower current rating, temperature rating, or polarization cannot be inserted into an appliance inlet that requires higher ratings."
Used for: quoted verbatim from the standard's own text: "This standard covers dimensional requirements for plugs and receptacles rated up to 60 Ampere and 600 Volts" and its own dimension-grouping table showing 5-15/5-20 sharing one envelope size, L5-20/L6-20 sharing a second, and L5-30/L6-30 sharing a third, distinct third size - the standard's own numeric proof that these are mechanically different parts. This is a community-uploaded scan of NEMA's copyrighted standard, not a page NEMA itself publishes for free; stated as that distinction rather than presented as NEMA's own site.
Used for: quoted verbatim: "This 12U open frame rack supports stationary loads up to 1320 lbs" and the spec table's own "Weight Capacity: 1320 lbs" field - a static load rating sourced to the maker's own product page for this specific model. No dynamic/rolling load figure appears on this page; none is claimed here.
Used for: every price in this cluster's tables, read from our catalogue at request time. Seeded 13 September 2026: 44 PDUs across basic/metered/switched/ATS classes, 34 racks (2-post, 4-post, enclosed, wall-mount), 10 rack accessories (shelves, blanking panels, cable management). Every electrical field (plug type, amperage, outlet count/type) is extracted from the listing's own title text and is seller-claim tier unless a specific citation above upgrades it to vendor-fact; a blank field means the listing did not state it and we did not infer one. Static/dynamic load ratings were sourced for exactly one model (source #6); every other tracked rack's load rating is unverified, stated as such rather than estimated.