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APC CS 500 - 500VA/300W, 120 volt battery backup & surge protector. Includes DSL compatible phone/fax/modem line protection, RS-232 & USB interfaces, USB cable, software & user's manual.
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We want to make sure you are completely satisfied with your purchase. Customers must return their product within 30 days of shipment to receive a full credit less a 15% restocking fee. Returns must be presented in new condition with all of the original packaging.
APC Power Protection products are designed to protect your computer, data, and on a larger scale, your company.

An Back-UPS Series instantly switches your computer to emergency battery backup power and allows you to work through brief power outages or to shut down your system in the event of an extended outage. High-performance surge suppression protects your computer from electrical noise and damaging power surges - even lightning.

General Information

  • Product Type: Line-interactive UPS
  • Product Series: CS
  • Brand Name: APC
  • Manufacturer: American Power Conversion Corp
  • Product Name: Back-UPS CS 500VA
  • Product Line: Back-UPS

Technical Information

  • Receptacles: 3 x NEMA 5-15R
  • Plug/Connector Type: NEMA 5-15P
  • Cord Length: 6 ft
  • Dataline Protection: RJ-11

Physical Characteristics

  • Height: 6.5"
  • Width: 3.6"
  • Depth: 11.2"
  • Weight (Approximate): 13.80 lb
  • Color: Beige


  • USB: Yes
  • Serial Port: Yes


  • Package Contents:
    • User Manual
    • Velcro Cord Management Straps Kit
    • CD with software
    • USB cable
    • User Manual
    • Velcro Cord Management Straps Kit
    • CD with software
    • USB cable
  • Green Compliant: Yes
  • Green Compliance Certificate/Authority: ENERGY STAR
  • Certifications & Standards:
    • FCC Part 15 Class B
    • Industry Canada
    • UL 1778
    • cUL Listed
  • Additional Information:
    • Additional Surge Protected Outlets
    • Cord Management
    • Software
    • USB compatible

Power Description

  • Load Capacity (VA): 500 VA
  • Power Consumption: 300 W
  • Input Voltage: 110 V AC
  • Output Voltage: 120 V AC
  • Surge Energy Rating: 480 J
  • Waveform Type: Step Wave

Battery Information

  • Maximum Battery Recharge Time: 8 Hour
  • Backup/Run Time (Half Load): 15 Minute
  • Backup/Run Time (Full Load): 3 Minute
  • Battery Characteristics: Spill-proof, Maintenance-free
  • Battery Chemistry: Sealed Lead Acid


  • Alarm:
    • On Battery
    • Low Battery
    • Overload

Environmental Conditions

  • Temperature: 113°F (45°C)
  • Thermal Dissipation: 24 BTU/h
  • Sound Emission: 45 dB(A)


  • Status Indicators: LED status display with On Line, On Battery, Replace Battery, Site wiring fault and Overload Indicators


  • Limited Warranty: 2 Year

Full specifications (PDF)


Customer Review Summary

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Protect Your Product

The APC BK500 is also known as American Power Conversion APC-BK500 .