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by Cisco
Product Line: Cisco ASR 900 Series
Product Type: Power Supply Unit
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Product Description

The A920-PWR400-A is a 400 W AC power supply designed for seamless integration with ASR 900U Series aggregation services routers. It supports a wide input voltage range from 85 VAC to 264 VAC, ensuring adaptability to various power environments. Featuring a plug-in form factor with hot-plug and redundancy capabilities, it boasts an impressive MTBF of 356,809 hours, signifying high reliability and continuous operation.

FAQs for the A920-PWR400-A

  • What is the power rating of the AC/DC power supply unit?
    The power rating is 400 W.
  • Can the power supply be used with any router?
    It is designed for use with ASR 900U Series aggregation services routers.
  • What is the minimum input voltage rating for this power supply?
    The minimum input voltage rating is 85 VAC.
  • Is the power supply hot-plug and redundant capable?
    Yes, it supports hot-plug and redundant operations.
  • What is the maximum input voltage rating?
    The maximum input voltage rating is 264 VAC.
  • How does the form factor of the power supply contribute to its functionality?
    Its plug-in form factor facilitates easy installation and replacement.
  • What is the MTBF (Mean Time Between Failures) of the power supply?
    The MTBF is 356,809 hours.
  • Does the power supply support both AC and DC input?
    Yes, it supports both AC and DC input.
  • What routers are compatible with this power supply?
    It is compatible with ASR 900U Series aggregation services routers.
  • What feature ensures the power supply's reliability in critical systems?
    Its capability for hot-plug and redundancy ensures reliability in critical systems.

Product Review

The CISCO A920-PWR400-A power supply unit, designed for ASR 900U Series aggregation services routers, offers a power rating of 400W and supports a wide input voltage range from 85 VAC to 264 VAC, ensuring compatibility with various power sources. Its hot-plug and redundancy capabilities enhance system reliability, allowing for uninterrupted operation and easy maintenance. However, with a mean time between failures (MTBF) of 356,809 hours, some network engineers might seek alternatives with higher MTBF values for increased longevity in critical network environments.


The CISCO A920-PWR400-A is a power supply module designed to deliver efficient energy conversion and supply for networking devices, specifically engineered for compatibility with ASR 900U Series aggregation services routers. This power module is a critical component for ensuring the continuous operation and reliability of network infrastructure, providing the necessary power to support a wide range of applications and services. With an AC power type, the CISCO A920-PWR400-A boasts a power rating of 400W, offering a substantial amount of power to meet the demands of high-performance networking equipment. This power capacity ensures that your networking devices have the energy required to maintain optimal performance levels, even under heavy loads. The power supply operates within a broad input voltage range, accepting a minimum input voltage of 85 VAC and capable of handling up to a maximum input voltage of 264 VAC. This wide range demonstrates the unit's versatility in various power environments, making it suitable for deployment in multiple geographic locations with varying power standards.
  • Mean Time Between Failures (MTBF) of 356,809 hours, indicating high reliability and longevity.
  • Designed with a plug-in form factor for easy installation and maintenance.
  • Supports hot-plug and redundancy features, allowing for uninterrupted service and enhanced system uptime.
The MTBF rating of 356,809 hours underscores the reliability and durability of the CISCO A920-PWR400-A. This figure represents an average lifespan, suggesting that the power supply is capable of operating for extended periods without failure, thereby reducing the need for frequent replacements and maintenance interventions. This reliability is crucial for maintaining the integrity and performance of network operations, ensuring that services remain uninterrupted over time. Thanks to its plug-in form factor, the installation and maintenance of the CISCO A920-PWR400-A are straightforward processes. This design allows for quick and easy integration into compatible networking devices without the need for specialized tools or extensive downtime, facilitating seamless upgrades and replacements. One of the most significant features of this power supply module is its support for hot-plug and redundancy capabilities. These features are essential for critical networking environments where continuous operation is paramount. Hot-plug capability allows for the power supply to be replaced or added without the need to power down the entire system, minimizing downtime and ensuring that network services continue to run smoothly. Redundancy, on the other hand, ensures that a backup power supply can take over immediately in the event of a primary power supply failure, further enhancing the system's reliability and reducing the risk of service interruptions. In summary, the CISCO A920-PWR400-A is engineered to meet the demands of modern network infrastructures, offering a reliable, versatile, and high-capacity power solution for ASR 900U Series aggregation services routers. Its wide input voltage range, high reliability, easy installation, and advanced features like hot-plug capability and redundancy make it an essential component for maintaining uninterrupted network operations.


Item Number CISCO A920-PWR400-A
Manufacturer CISCO
Power Type AC
Power Capacity 400 Watts
Lowest Input Voltage 85 VAC
Highest Input Voltage 264 VAC
Mean Time Between Failure (MTBF) 356,809 Hours
Enclosure Type Module
Support for Redundancy and Hot-Swapping Supported
Compatible With ASR 900U Series Aggregation Services Routers

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