Description

The Cisco C9K‑PWR‑650WAC‑R/2 650W AC Redundant Power Supply is a 650-watt AC internal power supply module designed for Cisco Catalyst 9500 Series switches. It provides reliable and efficient power delivery for high-performance enterprise and data-center switching environments.

This power supply supports dual 1+1 redundancy, allowing two power supplies to operate simultaneously so that if one unit fails, the other continues powering the switch without interruption. It uses front-to-back airflow cooling, making it suitable for structured rack deployments where consistent airflow direction is required.

The module operates within an AC input range of 90–264 V at 47–63 Hz and delivers up to 650 W of output power with approximately 94% efficiency, helping reduce heat generation and overall energy consumption. Its hot-swappable design enables installation or replacement without shutting down the switch, minimizing downtime in mission-critical networks.

The C9K-PWR-650WAC-R/2 is commonly used as a primary or secondary redundant power supply for Cisco Catalyst 9500 switches deployed in enterprise campus cores, aggregation layers, or data-center environments.

Key Features:

• 650 W AC power output for Cisco Catalyst 9500 switches

• 1+1 redundant power supply capability for high availability

• Wide input range: 90–264 V AC, 47–63 Hz

• High efficiency (~94%) for reduced power loss and heat

• Front-to-back airflow cooling optimized for rack environments