Name: PWR-3900-DC/2 Cisco 400W Internal DC Power Supply for 3925/3945 Routers
Brand: Cisco
SKU: PWR-3900-DC/2
Price: 1343.73 USD
Availability: InStock
Rating: 4.8 (119 reviews)

Product Overview
The PWR-3900-DC/2 Cisco 400-Watt internal DC power supply fits neatly into Cisco 3925 and 3945 routers. It delivers reliable DC power that these devices depend on to function properly, making it a practical choice for networks requiring stable internal power solutions.

General Information
Brand	Cisco
Part Number	PWR-3900-DC/2
Product Type	Desktop Power Supply
Condition	Refurbished

Technical Information
Max. Output Power	400W
Hot Swappable	Yes
Redundant Support	Yes
Cooling Type	Active Fan
Modularity	Non-Modular
rail_design	Single 48V Rail
Number of Fans	1

Compatibility
Form Factor	Proprietary
Compatible For	Cisco ISR 3925,Cisco ISR 3945

Physical Characteristics
Weight	9.00

Certifications and Environmental
Compliance Standards	WEEE, RoHS, CE, FCC, CCC, UL, TUV, cULus

Product Description
The PWR-3900-DC/2 is an internal DC power supply designed to provide stable power to Cisco 3925 and 3945 routers. It ensures that these network devices operate smoothly in environments where DC power is preferred or required. Often found in enterprise and service provider networks, this power supply is built for IT professionals who need dependable hardware components to maintain critical communications infrastructure. Key Features Offers a consistent 400-Watt power output for mid-range router models Fits directly into Cisco 3925 and 3945 chassis for seamless integration Helps maintain uptime by delivering steady DC power Designed to meet specific power requirements of Cisco routers Facilitates easy replacement or upgrade within existing network setups This power supply is typically deployed inside routers located in data centers, branch offices, or network hubs. Its role is crucial for keeping Cisco routers running without interruption, particularly where direct current power sources are used. By using this unit, network administrators can ensure their routing equipment stays powered efficiently, reducing downtime and supporting continuous network operations.

Use Cases
The PWR-3900-DC/2 is commonly utilized in enterprise network environments where Cisco 3925 and 3945 routers operate within DC-powered infrastructures. It is particularly suited for organizations that rely on consistent and stable power delivery in data centers or remote branch offices with DC power availability. How It's Used: Powering Cisco 3925 and 3945 routers in telecom central offices that utilize DC power systems. Supporting network edge deployments in industrial or manufacturing facilities where DC power is standard. Enabling continuous operation of enterprise IT networks with rack-mounted Cisco routers in data center environments. Facilitating reliable network connectivity in remote offices that integrate DC-based backup power solutions. Providing power redundancy for virtualized environments that require high network uptime and DC power compatibility. This power supply ensures operational stability by delivering consistent DC power critical to Cisco router performance. It supports network scalability and resilience by aligning with DC power infrastructure, reducing downtime risks in demanding IT environments.