Cisco PWR-3900-AC — Reliable 400W Power for Your 3900 Series Router
Keep your Cisco 3900 Series ISR running with confidence. This refurbished Cisco PWR-3900-AC delivers 400 watts of clean, stable AC power and supports hot-plug installation — so you can add or replace the supply without taking your network offline. Ideal as a primary or redundant (secondary) power source.
Key Specifications
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Part Number: PWR-3900-AC (also referenced as PWR-3900-AC=)
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Power Output: 400 Watts
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Input Voltage: AC 100–240V (auto-sensing, worldwide compatible)
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Frequency: 47–63 Hz
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Form Factor: Hot-plug, plug-in module
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Use: Primary or redundant (secondary) power supply
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Compatibility: Cisco 3925, 3925E, 3945, 3945E Integrated Services Routers
Why Buy from Reef Telecom?
- Industry-leading 10-year warranty on all refurbished equipment
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Free shipping on orders over $300
- Every unit professionally tested and inspected before shipment
- Trusted by IT professionals and enterprises nationwide
Compatibility & Use Cases
The PWR-3900-AC is designed for the Cisco ISR 3900 Series, including the 3925, 3925E, 3945, and 3945E routers. Deploy it as a primary power supply for new installations or as a secondary hot-swap unit for power redundancy in mission-critical environments such as branch offices, data centers, and enterprise WAN deployments.
