Cisco PWR-48V-120W Full English Description

Product Overview

Important Note: This is an external standalone power brick,not a hot-swappable internal chassis PSU. The connected host appliance must be fully powered down before replacing the adapter. This unit can supply power for PoE-capable endpoints (802.3af). Always verify DC plug dimensions, wiring polarity and current rating prior to installation; mismatched connectors may cause permanent hardware damage. Unapproved third-party adapters may void Cisco hardware warranty.

Key Features

1. 120 Watt Continuous Rated Output

   DC Output: 48 VDC, maximum 2.5A. Delivers stable, well-regulated DC power to support compatible network hardware and low-power PoE loads under full operating conditions.
2. Universal Wide-Range Global AC Input

   Worldwide auto-ranging mains specification:

• Input Voltage: 100 VAC ~ 240 VAC
• Operating Frequency: 50 Hz – 60 Hz
  Supports interchangeable region-specific AC power cords (US / EU / UK / AU).

1. Desktop Brick Form Factor

   Compact external AC-DC power unit with integrated DC output cable and dedicated barrel connector for supported Cisco hardware.

   Important Note: Not interchangeable with lower wattage 48V adapters or power supplies of different voltage ratings (12V / 24V).
2. Non Hot-Swap Design

   Live disconnection is not supported. Complete power shutdown of the target network device is mandatory during adapter replacement.
3. Multi-Stage Built-In Hardware Protection

   Integrated overvoltage protection (OVP), overcurrent protection (OCP), short-circuit protection (SCP), overtemperature protection (OTP), and surge protection to safeguard both the power adapter and connected Cisco network infrastructure.
4. High-Efficiency Energy Saving Design

   Low standby idle power consumption, compliant with international energy efficiency standards. Designed for reliable 24/7 continuous operation in small offices, remote branches and lab environments.

Supported Hardware Platforms

• Cisco Small Business PoE switches
• Select outdoor / enterprise wireless access points
• External 802.3af PoE injectors
• Compact legacy edge appliances requiring external 48V 120W DC power

Not compatible: Catalyst enterprise rack switches, ISR 4000/8000 series routers, Firepower security appliances, Meraki cloud-managed hardware.

Reminder: Confirm exact hardware compatibility via the official Cisco datasheet before purchasing.

Typical Application Scenarios

• Small office and remote branch wireless and PoE network deployments
• Spare replacement power supply for existing Cisco 48V DC-powered access equipment
• Sites deploying IP cameras, low-power wireless APs via 802.3af PoE
• Unmanned remote network sites and laboratory test environments

Technical Specifications

• Form Factor: External desktop AC-DC switching power adapter
• AC Input: 100–240 VAC, 50/60 Hz
• DC Output: 48 VDC, 2.5 A (120W)
• DC Connector: Cisco dedicated barrel plug (verify polarity before use)
• Hot Swappable: No
• Redundancy Support: No
• PoE Support: Supports supplying power for 802.3af PoE devices
• Compliance: UL60950-1, EN60950-1, FCC Class A, CE certified, RoHS compliant

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