PWR-1100AC-R — Arista 1100-Watts Bk-to-Front Airflow Switch PSU
MPN: PWR-1100AC-R|By: Arista

Starting from
$710
Indicative — final pricing confirmed with your quote.
In Stockships worldwide
- Condition:
- New — authorized channel
- Warranty:
- Full manufacturer warranty
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Bulk order? Request volume pricing
Product overview
Arista lists PWR-1100AC-R as an 1100-Watts bk-to-front airflow Switch PSU. Headroom matters more than the label wattage once GPUs or a full drive bay are in the chassis. This supply is rated 1100W. Tell us the configuration and we will work the draw out rather than guess at it.
Send the quantity you need and we will come back within 48 business hours with availability confirmed, not estimated.
Featuring
- Power Rating
- 1100W
- Manufacturer
- Arista
Physical characteristics
- Product Type
- Power Supplies
- Expedited shipping options are available — rates confirmed with your quote.
- Purchase orders accepted from qualified institutions.
- Compatibility is validated against your server platform before dispatch. Send us the model and we will confirm support.
Published specifications for PWR-1100AC-R. Anything not listed here we will confirm against the manufacturer's documentation before quoting — we would rather answer the question than let you assume.
Where the Arista PWR-1100AC-R is deployed
- Like-for-like replacement of PWR-1100AC-R in an existing system
- Restoring redundancy after one supply in a pair has failed
- Adding a second supply to a chassis shipped with one
Who this part is for
- MSPs holding a matched PSU spare per chassis family
- Procurement sourcing a like-for-like supply outside a maintenance contract
- IT teams restoring redundancy after one supply in a pair has failed
What you get ordering this from us
Ordered by part number
The order is placed against PWR-1100AC-R, not against a description of it, so there is no room for a substitution you did not agree to.
Draw calculated, not assumed
We work out what the configuration actually pulls before recommending a wattage.
Answered by a human
A quote comes back with the reasoning attached, including the cases where we think you should buy something else.
Questions buyers ask about this part
- Is PWR-1100AC-R genuine and is the warranty intact?
- Yes — new and sealed, with the Arista warranty and the firmware update path intact. We do not sell refurbished stock as new, and we do not source grey-market units.
- Will PWR-1100AC-R work in my server?
- Send the server model and the part number of the supply already fitted. In a redundant pair both units have to match on wattage and efficiency grade, or the chassis alerts on every boot.
- Do you accept purchase orders and quote at volume?
- Yes — POs from qualified organisations, net terms on approval, and banded pricing once the quantity is worth banding. Send the number and we will price it properly.
Compare other Power Supplies we stock
Browse all Power Supplies or everything we stock from Arista.
Specifying a system, not just the part?
An accelerated node draws far more than a general-purpose server, so power is sized with the build rather than assumed from the chassis.
