PWR‑3900‑POE Specifications
Cisco 3900 Series AC Power Supply with Power over Ethernet (PoE) support
Manufacturer: Cisco
Manufacturer Model: PWR‑3900‑POE
Product Line: Cisco 3900 Series Power Supplies
Product Series: AC Power Supply with PoE
Product Type: Hot‑swappable AC Power Supply Module
Product Name: Cisco 3900 Series AC Power Supply with PoE
KEY FEATURES:
Input Voltage: 100–240 V AC
Input Frequency: 47–63 Hz
PoE Support: Yes — Supports powering PoE modules/ports in compatible 3900 Series routers
Designed for: Cisco 3925/3945 & 3925E/3945E Series ISR platforms
PERFORMANCE:
Power Capacity: ~540 W (peak)
Supports combined system + PoE module power demands
ENVIRONMENTAL & RELIABILITY:
Enterprise branch‑office router environment (24×7 operation)
Supports redundant power supply configurations when paired with compatible modules
PHYSICAL:
Form Factor: Plug‑in/hot‑swappable module for Cisco 3900 Series routers
Weight: Approximate module weight (varies with variant)
Dimensions: Standard module size for the host chassis
If you like, I can remove all blank line spacing (so it becomes one continuous block of text) and also try to find a full detailed datasheet PDF with mechanical drawings and detailed electrical specs for you.

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