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

Starting from
$710
Indicative. Final pricing is confirmed with your quote.
In Stockships worldwide
- Condition:
- New (authorized channel)
- Warranty:
- Full manufacturer warranty
Prefer your own inbox? Email us about this part
Bulk order? Request volume pricing
Authorized & warrantied
Sourced through authorized distribution, with the full manufacturer warranty.
Compatibility checked
Validated against your server platform before dispatch.
Delivery & lead time
Confirmed with your quote, including expedited freight where available.
Business & public sector
POs, net terms and volume pricing for qualified organizations, government and edu.
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.
Specifications
General
- Manufacturer part number
- PWR-1100AC-R
- Product Type
- Power Supplies
- Manufacturer
- Arista
Technical specifications
- Power Rating
- 1100W
Published specifications for PWR-1100AC-R. Anything not listed here we will confirm against the manufacturer's documentation before quoting, because 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
| Model | Brand | Key spec | Availability | From |
|---|---|---|---|---|
| Dell 495W Hot-Plug Redundant Power Supply for PowerEdge Rack Servers | Dell Technologies | Efficiency: 80 PLUS Platinum | In Stock | $175 |
| HPE 500W Flex Slot Platinum Hot-Plug Power Supply for ProLiant Servers | HPE | Efficiency: 80 PLUS Platinum | In Stock | $190 |
| Supermicro 1200W Redundant Titanium Hot-Swap Power Supply Module | Supermicro | Efficiency: 80 PLUS Titanium | In Stock | $415 |
| Lenovo 750W 80 PLUS Platinum Hot-Plug Server Power Supply | Lenovo | Wattage: 750W | In Stock | $165 |
| IBM 550W 80 PLUS Platinum Hot-Plug Server Power Supply | IBM | Wattage: 550W | In Stock | $100 |
| HP 460W 80 PLUS Gold Hot-Plug Server Power Supply | HP | Wattage: 460W | In Stock | $60 |
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.
