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APC Back-UPS CS 500VA, 230V, 4 IEC outlets


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This product is part of the Back-UPS range. The BK550EI features a total of 6 power outlets, 3 of which are UPS battery backup and 3 that are surge only. Its runtime at 100W is 24 minutes 20 seconds It provides data line protection with a RJ45 analog phone line for phone or fax or modem or DSL. Its dimensions are 16.5 x 9.1 x 28.4 cm and 6.32kg. The BK550EI ensures office systems and their valuable data are protected from dangerous power surges, spikes and blackouts.


Lead timeUsually in Stock
Run time for load
Enter the total load (power draw) of all devices that will be protected by the UPS. This will be used to estimate the run time of your devices during a total power outage. Adding run time increases availability by allowing the system to operate through longer outages without shutting down.
Min-max: 30-300 W
Max. Capacity Used
The maximum percentage of UPS capacity used to support your specified load.
Main Input Voltage230 V
Main Output Voltage230 V
rated power in W300 W
rated power in VA500 VA
plug standardIEC 60320 C14
nb of power socket outlets3 IEC 60320 C13
1 IEC 60320 C13 surge
2 IEC Jumpers surge
number of cables2
battery typeLead-acid battery
provided equipmentCD with software
Documentation CD
1 x detachable IEC power cord
1 x detachable 1.2 m IEC power cord
Telephone cable
USB cable
Warranty card
max runtime45 min
Number of power module free slots0
Number of power module filled slots0
height16.5 cm
width9.1 cm
depth28.4 cm
net weight6.32 kg
mounting locationFront
mounting preferenceNo preference
mounting modeNot rack-mountable
two post mountable0
USB compatibleNo
network frequency47...63 Hz
50/60 Hz +/- 3 Hz auto-sensing
input voltage limits160...300 V adjustable
180...266 V
maximum input current7 A
switching current capacity7 A
Maximum configurable power in W300 W
output frequency47...63 Hz sync to mains
50/60 Hz +/- 1 Hz unsynchronised
UPS typeStandby
Wave typeStepped approximation to a sinewave
Maximum configurable power in VA500 VA
Transfer time6 ms typical : 10 ms maximum
product certificationsC-Tick
ambient air temperature for operation0…40 °C
relative humidity0…95 %
operating altitude0...10000 ft
ambient air temperature for storage-15…45 °C
storage Relative Humidity0…95 %
storage altitude0.00…15240.00 m
acoustic level40 dBA
heat dissipation24 Btu/h
Batteries & Runtime
Run TimeView Runtime Graphaction_new_window
EfficiencyView Efficiency Graphaction_new_window
number of battery filled slots0
number of battery free slots0
Battery recharge time8 h
number of battery replacement quantity1
battery voltage12 V
battery capacity7.0 Ah
battery charger power10 W rated
Battery power in VAH83 VAh capacity
84 VAh runtime
battery life4…6 year(s)
Replacement batteryRBC2action_new_window
extended runtime0
Communications & Management
free slots0
control panelLED status display with on line : on battery : replace battery and overload indicators
alarmAlarm when on battery : distinctive low battery alarm : overload continuous tone alarm
Surge Protection and Filtering
Surge energy rate310 J
noise suppressionFull time multi-pole noise filtering : 5% IEEE surge let-through : zero clamping response time : meets UL 1449
Data line protectionRJ45 analog phone line for phone/fax/modem/DSL
Packing Units
Package 1 Weight7.05 kg
Package 1 Height17.8 cm
Package 1 width24.1 cm
Package 1 Length36.8 cm
Number of Units in Package 21
Number of Units in Package 348
Contractual warranty
Warranty2 years repair or replace


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Well-being performance

REACh free of SVHC


REACh Regulation

EU RoHS Directive

Pro-active compliance (Product out of EU RoHS legal scope)

EU RoHS Declaration

Environmental Disclosure

Circularity Profile




Software and Firmware

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