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Arista

Arista PWR-621-AC-BLUE | 720XP 650W AC Power Supply, Rear-to-Front Airflow

PWR-621-AC-BLUE

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Description

The PWR-621-AC-BLUE is a 650W AC hot-swappable power supply module for the Arista 720XP and 722XPM 1RU campus PoE switch series. It suits wiring closets and data rooms that need rear-to-front (reverse) airflow, and can be used as a spare or as an upgrade for redundant power.

The module delivers 650W output from a wide-range 100-240V AC input at 50-60Hz, drawing 8 to 3.5A, and is rated 80 PLUS Gold for efficiency. Power connects through an IEC-320-C16 inlet. The BLUE designation identifies the rear-to-front airflow variant, while the PWR-621-AC-RED is the front-to-rear version. Up to two supplies can be fitted on 650W-capable 720XP models for N+1 redundancy or additional PoE budget, and a single 650W supply is the default on the 720XP-24ZY4.

Airflow direction must match the fans in the chassis, so this module is not interchangeable with the RED variant within the same switch. The rear-to-front fan module for this airflow direction is the FAN-7000-R. Check the platform datasheet before fitting it to other Arista switch families.

Enquire with XS Network Tech for new or used pricing and availability.

Features

- Hot-swappable, field-replaceable AC power supply module
- Rear-to-front airflow variant for layouts that need reversed airflow
- Supports single or redundant (N+1) AC power configurations
- 80 PLUS Gold efficiency rating
- Wide-range 100-240V AC input suits global power environments
- Same 650W module family as the front-to-rear PWR-621-AC-RED

Warranty

All products sold by XS Network Tech include a 12-month warranty on both new and used items. Our in-house technical team thoroughly tests used hardware prior to sale to ensure enterprise-grade reliability.

All technical data should be verified on the manufacturer data sheets.

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Technical Specifications

FAQs

Technical Specifications

- Output power: 650W
- Input voltage: 100-240V AC
- Input current: 8 - 3.5A
- Input frequency: 50-60Hz
- Input connector: IEC-320-C16
- Efficiency: 80 PLUS Gold
- Airflow: Rear-to-front (BLUE)
- Hot-swappable: Yes
- Redundancy: Up to 2 supplies per switch for N+1 on 650W-capable 720XP models
- Power supply model: PWR-621-AC-RED/BLUE (BLUE = rear-to-front airflow)

FAQs

Q: Which Arista switches does the PWR-621-AC-BLUE support?
A: It is a supported spare power supply for the Arista 720XP and 722XPM 1RU campus PoE series, on models that support 650W such as the 720XP-48ZC2 and 720XP-24ZY4. Check the platform datasheet before using it in other Arista switch families.

Q: Can I mix the BLUE and RED power supplies in one switch?
A: No. Airflow direction must match the fans in the chassis. The BLUE module is rear-to-front and pairs with the FAN-7000-R fan module, while the PWR-621-AC-RED is the front-to-rear version.

Q: What power cable does it need?
A: It has an IEC-320-C16 input, so it requires an IEC-320 compliant power cable. It accepts 100-240V AC at 50-60Hz.

Q: Can I run two of these for redundancy?
A: Yes. Up to two 650W supplies can be installed on supported 720XP models for N+1 redundancy or additional PoE budget. A single 650W supply is the default on the 720XP-24ZY4.

Q: How does it differ from the PWR-621-AC-RED?
A: Both are 650W AC modules in the same family. The BLUE variant provides rear-to-front airflow, while the RED variant provides front-to-rear airflow.

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