Ubiquiti USW Ultra 42W

PoE++ Powered 7‑Port UniFi PoE+ Switch – Ubiquiti USW Ultra 42W

Ubiquiti USW Ultra 42W is a compact yet powerful UniFi-managed 7‑port Gigabit PoE+ switch that operates entirely on PoE++ power—no AC adapter required. Designed for installations that require neat cabling and silent operation, the Ubiquiti USW Ultra 42W delivers enterprise-grade switching with fanless reliability in minimal space.

This switch is powered using a single PoE++ input port (802.3bt), providing a total PoE+ output budget of 42 W across its seven ports. The Ubiquiti USW Ultra 42W simplifies infrastructure by eliminating bulky adapters while delivering clean power to access points, cameras, and IoT devices.

Key Features of Ubiquiti USW Ultra 42W

• 7 × Gigabit RJ45 ports with PoE+ output (802.3at)
• Total PoE+ budget: 42 W
• PoE++ (802.3bt) powered—no AC adapter needed
• Fanless, silent operation—ideal for noise-sensitive environments
• Managed via UniFi Network Controller with VLAN, QoS, and monitoring
• LED indicators for link, power, and PoE status
• Wall, shelf, or desktop mounting options

PoE++ Input, No AC – Clean Setup

The Ubiquiti USW Ultra 42W requires only a single PoE++ feed—ideal when AC sockets are unavailable or unwanted. With no AC adapter and a small, fanless design, it provides clean installs with less cabling and clutter, while still offering robust power and management capabilities.

This makes the Ubiquiti USW Ultra 42W suitable for cabling closets, behind displays, or compact network zones.

Silent with Fanless Reliability

Featuring passive thermal design, the Ubiquiti USW Ultra 42W operates silently—making it perfect for offices, bedrooms, AV racks, and noise-sensitive areas. The lack of moving parts increases longevity while reducing maintenance.

Despite its compact size, the Ubiquiti USW Ultra 42W is engineered to remain cool and reliable under sustained PoE load.

UniFi Managed Networking

Fully integrated into the UniFi ecosystem, the Ubiquiti USW Ultra 42W supports VLAN, QoS, port monitoring, and firmware updates via the UniFi Controller or mobile app—providing centralized visibility and ease of management.

Setup is quick: adopt the switch in UniFi, assign port options, schedule PoE output, and monitor network health—all from a single dashboard.

Mounting & Deployment Flexibility

The Ubiquiti USW Ultra 42W can be placed on a desk, shelf, or mounted under tables or walls using included brackets. Its compact footprint and power-over-cable setup allow flexible placement in network closets, AV setups, or remote office pods.

Use Case Scenarios

• Silent office setups powering APs and VoIP
• Behind displays or wall-mounted AV installations
• Compact PoE zones with minimal cabling
• Remote IoT patch panels requiring clean power
• Temporary or rental setups needing fast deployment

Conclusion

The Ubiquiti USW Ultra 42W provides a clean, silent, and fully managed 7‑port Gigabit PoE+ switching solution powered solely by PoE++. With managed functionality, compact design, and no AC adapter needed, the Ubiquiti USW Ultra 42W is the ideal choice for streamlined, professional network installs.