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by Cisco
Product Line: Cisco Catalyst 3K-X Series Switches
Product Type: Power Supply
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Original price $0.00 - Original price $94.00
Original price
$0.00 - $94.00
Current price $0.00
Title: Surplus

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Product Description

The C3KX-PWR-1100WAC is a Cisco power supply unit with a rated maximum power output of 1100W and an efficiency that results in a total output of 3793 BTU/hr. It operates within an input-voltage range of 115-240VAC, at a frequency of 50-60 Hz, and supports an input current of 12-6A. Designed for durability and reliability, it features a Mean Time Between Failure (MTBF) of 392,174 hours, and operates effectively in environments with temperatures ranging from -5 to 45°C and relative humidity from 5% to 95%, noncondensing.

Key Feature for the C3KX-PWR-1100WAC

  • What is the maximum transmission length for Category 6a cabling?
    The maximum transmission length is 100 meters.
  • How does the switching fabric capacity of the 3750X-12S and 3750X-24S compare to other switches?
    The switching fabric capacity is 160 Gbps.
  • What is the DRAM capacity for the standard model and the 3750X-12S and 3750X-24S models?
    The standard model has 256 MB of DRAM, while the 3750X-12S and 3750X-24S models have 512 MB.
  • Can you detail the flash memory specifications for these switches?
    Standard models have 64 MB of flash memory, and the 3750X-12S and 3750X-24S models have 128 MB.
  • How many total VLANs can be supported?
    These switches support up to 1005 total VLANs.
  • What range of VLAN IDs is available on these devices?
    VLAN IDs available range up to 4K.
  • What is the capacity for Switched Virtual Interfaces (SVIs) on these switches?
    The total capacity for SVIs is 1K.
  • What is the Mean Time Between Failure (MTBF) for these units?
    The MTBF is 392,174 hours.
  • How does the acoustic noise level vary between models with AC power supplies and those with GE SFP port models?
    With AC power supply, the noise level is 43 dbA typical, 46 dbA maximum. For GE SFP port models, it's 31 dbA typical, 34 dbA maximum.
  • What are the environmental operating conditions for these switches in terms of temperature and humidity?
    The operating temperature range is 23 to 113°F (-5 to 45°C), with a relative humidity range of 5% to 95%, non-condensing.

Product Review

The Cisco C3KX-PWR-1100WAC power supply supports a wide range of input voltages and frequencies, making it versatile for global use, and offers a high output of 1100W, capable of powering demanding network configurations. However, its acoustic noise levels, particularly with AC power supply under load, can reach up to 46 dbA, which may be a concern in quieter environments. Additionally, the device's environmental durability is notable, with a high mean time between failure (MTBF) of 392,174 hours and operational resilience across a broad range of temperatures and humidity.


The Cisco C3KX-PWR-1100WAC is a power supply module designed for optimal performance and efficiency in networking environments. This power supply unit (PSU) supports a wide range of Cisco Catalyst switches, providing the necessary power to ensure reliable operation under various conditions. With a maximum rated output of 1100W, it meets the energy demands of high-performance networking hardware. Key specifications include a switching fabric of 160 Gbps, ensuring rapid data transfer and processing speeds across the network. The DRAM varies, with a standard configuration of 256 MB, which increases to 512 MB for specific models like the 3750X-12S and 3750X-24S, accommodating the needs of more demanding applications. Flash memory also varies, starting at 64 MB and expanding to 128 MB for the aforementioned models, providing ample storage for the operating system and configurations. This power supply unit supports up to 1005 VLANs, offering extensive network segmentation capabilities. It also supports 4K VLAN IDs and up to 1K Switched Virtual Interfaces (SVIs), allowing for comprehensive network design and scalability options. The Mean Time Between Failure (MTBF) is rated at 392,174 hours, highlighting the unit's reliability and durability over extended periods. The acoustic noise level varies depending on the model and load, with AC power supply configurations generating between 43 dbA to 46 dbA under a 16PoE+ port load. Models equipped with GE SFP ports produce significantly less noise, between 31 dbA to 34 dbA, ensuring a quieter operating environment. Environmental tolerances include an operating humidity range from 5% to 95%, noncondensing, and a storage temperature range from -40°C to 70°C. The unit is designed to withstand vibrations and shock, with specific ratings for each, ensuring stability and reliability in physical operating conditions. Electrical specifications detail an input-voltage range of 115-240VAC at a frequency of 50-60 Hz, with an input current of 12-6A. The output ratings are specified as -56V@19.64A, with a total output BTU of 3793 BTU/hr, equivalent to 1100W. The power supply maintains an output holdup time of 10 ms minimum at 102.5VAC, ensuring continuous operation during brief power interruptions. Physical specifications of the C3KX-PWR-1100WAC include dimensions of 1.58 X 3.25 X 13.25 inches and a weight of 3.5 lb (1.6 kg), making it a compact and manageable component within a networking setup. The operating temperature range is from 23 to 113°F (-5 to 45°C), accommodating a wide range of environmental conditions. Key features include: -
  • Support for up to 1005 VLANs and 4K VLAN IDs
  • Mean Time Between Failure (MTBF) of 392,174 hours
  • Input-voltage range of 115-240VAC, with an energy-efficient design
The Cisco C3KX-PWR-1100WAC is designed to meet the power requirements of Cisco Catalyst switches, ensuring reliable and efficient operation. Its advanced features and specifications make it a critical component in supporting the demands of modern networking environments.


Part Number and Manufacturer Cisco C3KX-PWR-1100WAC
Compatible Cable Type Cat 6a, up to 100 meters
Data Processing Capacity 160 Gigabits per second
Memory (DRAM) 256 MB standard, 512 MB for models 3750X-12S and 3750X-24S
Storage (Flash Memory) 64 MB standard, 128 MB for models 3750X-12S and 3750X-24S
Maximum VLANs Supported 1005
Available VLAN IDs Up to 4096
Maximum SVIs Up to 1000
Operational Reliability (MTBF) 392,174 hours
Sound Level with AC Power Supply (16 PoE+ ports active) 43 dbA normally, 46 dbA max
Sound Power with AC Power Supply (16 PoE+ ports active) 5.2 Bel normally, 5.5 Bel max
Sound Level for GE SFP port models 31 dbA normally, 34 dbA max
Sound Power for GE SFP port models 4.2 Bel normally, 4.5 Bel max
Humidity Tolerance 5% to 95%, non-condensing
Storage Conditions Temperature: -40°C to 70°C, Altitude: up to 15,000 ft
Vibration Tolerance 0.41Grms, 3 to 500Hz, with specified spectral break points
Shock Tolerance 30G for 2ms, Half sine wave
Power Capacity 1100 Watts
Heat Dissipation 3793 BTU/hr equivalent to 1100W
Input Voltage and Frequency 115-240VAC, 50-60Hz
Input Current 12-6A
Power Output -56V at 19.64A
Power Supply Stability Minimum 10 ms holdup time at 102.5VAC
Power Supply Connection Type IEC 320-C16 (IEC60320-C16)
Cord Rating 13A
Dimensions and Weight 1.58 x 3.25 x 13.25 inches, 3.5 lb (1.6 kg)
Operating Temperature Range 23°F to 113°F (-5°C to 45°C)

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