PWR-1900AC-F: Arista 1900W AC Modular Switch Power Supply Front-to-Rear Airflow
Also listed as: PWR-1900AC-F-AR, PWR-1900AC-F-C
The Arista PWR-1900AC-F is a 1900W AC hot-swappable power supply with front-to-rear airflow engineered for Arista 7500 and 7800 Series modular chassis systems.
Specifications
| Part number | PWR-1900AC-F |
|---|---|
| Brand | Arista |
| Type | Power supplies |
| Other numbers | PWR-1900AC-F-AR, PWR-1900AC-F-C |
| Status | current |
| Form factor | Modular hot-plug bay |
| Power output (W) | 1,900 |
| Input voltage | 200-240 VAC |
| Efficiency | Platinum |
| Airflow | Front-to-Rear (Port-to-FRU) |
About the PWR-1900AC-F
The Arista PWR-1900AC-F power supply module supplies 1900 Watts of continuous AC power for high performance modular spine switches. Designed to support dense 100GbE and 400GbE line cards, it provides N+N and N+1 power redundancy across multi-terabit switching fabrics with high energy efficiency.
Compatibility
Compatible with Arista 7504, 7508, 7512, 7504R, 7508R, 7804R, 7808R, and 7816R modular switch chassis. It supports hot swap replacement without interrupting network forwarding when redundant power supplies are active in the chassis power subsystem under continuous operation.
How to identify a genuine unit
Housed in a heavy duty steel chassis with an integrated IEC C20 or C16 power socket, durable extraction handle, internal high-flow cooling fan, and operational status LEDs. The label confirms part number PWR-1900AC-F, serial number, and electrical ratings.
Buying used
Inspect connector gold plating and ensure the internal cooling fan spins freely without mechanical obstruction. Test under electrical load in a modular switch chassis to confirm stable voltage rail outputs and proper thermal management sensor reporting across all line cards.
Fits these models
- Arista 7500 7504
- Arista 7500E 7504E
- Arista 7500R 7504R
- Arista 7500R3 7504R3
- Arista 7500 7508
- Arista 7500E 7508E
- Arista 7500R 7508R
- Arista 7500R3 7508R3
- Arista 7500R 7512R
- Arista 7800R3 7804R3
- Arista 7800R3 7808R3
- Arista 7800R3 7816R3
Check compatibility with Arista
Before you buy, confirm the exact configuration against the vendor's own lists: firmware levels, operating systems, adapters and optics that Arista has tested with the Arista PWR-1900AC-F.
- Compatibility Arista transceivers and cables
- Support Arista Support
FAQ
What switch platforms use the PWR-1900AC-F power supply?
It is designed for Arista 7500, 7500R, and 7800 Series modular spine chassis.
What AC input voltage is required for 1900W output?
It requires high line AC input between 200V and 240V to deliver full 1900W power capacity.
Buying or selling PWR-1900AC-F?
New, refurbished or used. Tell us the quantity and condition and we connect you with a vetted reseller in your region, usually within one working day.
Sources
- Arista 7500R Series Modular Switch Data Sheet, checked 2026-10-27