Cisco Meraki PWR-MS420-400AC-R 400W AC Front-to-Back Airflow Switch Power Supply

The Cisco Meraki PWR-MS420-400AC-R is a 400W AC hot-swap power supply for Meraki MS420 aggregation switches, the MS420-24 and MS420-48. It is a field-replaceable module that slides into one of the two power supply bays on the switch.

Input is 100 to 240V AC at 47 to 63 Hz, so the same supply runs on North American and international circuits. Airflow is front to back, with intake on the port side, matching the MS420 fan modules. Every supply and fan in the switch must move air the same way. The supply is hot-swappable.

The MS420 chassis takes two supplies for redundant operation. With two installed, the switch keeps forwarding if one supply or one circuit fails, and a failed unit can be replaced without powering the switch down, so the aggregation layer stays up during the swap. Feed the two supplies from separate circuits or UPS units where possible. The MS410 and MS425 use different supplies, so this part fits the MS420 only.

The supply fits the MS420-24-HW 24-port 10GB SFP+ switch. A spare FAN-MS420-R fan module keeps the cooling side covered as well.

This seller refurbished Cisco Meraki PWR-MS420-400AC-R power supply is tested, working, and covered by the NetworkTigers one-year warranty.