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APC Smart-UPS SC 420VA 120V Factory Serviced


  • What does the end of commercialization mean ?

    End of commercialization is the last date APC will accept an offer for this reference. Howerver, After Sales Services (repair, spare parts, etc.) will continue until its end of life.

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SC420W has not been replaced. Please contact your customer care center for more information.


PresentationAPC Smart-UPS SC is ideal for small and medium businesses looking to protect networking equipment and point-of-sale (POS) devices from power disturbances and outages. The Smart-UPS SC features network grade protection, hot swap batteries, and built-in data line protection for worry free uninterruptible power protection for increased availability. Built on the same standards as the award-winning Smart-UPS, Smart-UPS SC provides the basic features and manageability needed to protect entry-level applications
Lead timeWhile Supplies Last
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: 26-260 W
Max. Capacity Used
The maximum percentage of UPS capacity used to support your specified load.
Main Input Voltage120 V
Main Output Voltage120 V
Rated power in W260 W
Rated power in VA420 VA
Input Connection TypeNEMA 5-15P
output connection type4 NEMA 5-15R
Cable length6 ft (1.83 m)
number of cables1
Battery typeLead-acid battery
provided equipmentCD with software
Smart UPS signalling RS-232 cable
User manual
Number of power module filled slots0
Number of power module free slots0
Height6.61 in (16.8 cm)
Width4.69 in (11.9 cm)
Depth14.49 in (36.8 cm)
Net weight22.05 lb(US) (10 kg)
Mounting preferenceNo preference
Mounting modeNot rack-mountable
Two post mountable0
USB compatibleNo
input voltage limits75...154 V adjustable
82...144 V
network frequency50/60 Hz +/- 3 Hz auto-sensing
Maximum configurable power in VA420 VA
Maximum configurable power in W260 W
Transfer time4 ms typical : 8 ms maximum
UPS typeLine interactive
Wave typeStepped approximation to a sinewave
output frequency50/60 Hz +/- 3 Hz sync to mains
Product certificationsCSA
Equipment protection policyLifetime : $150000
Acoustic level45 dBA
Heat dissipation50 Btu/h
Operating altitude0...10000 ft
Ambient air temperature for operation32…104 °F (0…40 °C)
Ambient air temperature for storage5…113 °F (-15…45 °C)
Storage altitude0…50000 ft (0.00…15240.00 m)
relative humidity0…95 %
storage Relative Humidity0…95 %
Batteries & Runtime
Run TimeView Runtime Graphaction_new_window
EfficiencyView Efficiency Graphaction_new_window
Extended runtime0
Number of battery filled slots0
Number of battery free slots0
Battery recharge time5 h
Number of battery replacement quantity1
Battery life3…5 year(s)
Battery power in VAH84 VAh runtime
battery charger power17 W rated
Communications & Management
AlarmAlarm when on battery : distinctive low battery alarm : overload continuous tone alarm
control panelLED status display with load and battery bar-graphs and 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
Data line protectionRJ45 modem/fax/DSL/10-100 base-T protection
Surge energy rate412 J
Noise suppressionFull time multi-pole noise filtering : 0.7% IEEE surge let-through : zero clamping response time : meets UL 1449
Packing Units
Unit Type of Package 1PCE
Number of Units in Package 11
Package 1 Height12.52 in (31.8 cm)
Package 1 Width10.31 in (26.2 cm)
Package 1 Length20.00 in (50.8 cm)
Package 1 Weight24.00 lb(US) (10.887 kg)
Contractual warranty
Warranty1 year repair or replace



Software and Firmware

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