American Power Conversion (APC) Smart-UPS 420VA UPS with LED Status Display, 120V Input, 412 Joules Surge Energy Rating

American Power Conversion (APC)
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About American Power Conversion (APC) APC Smart-UPS 420VA UPS

The APC Smart-UPS 420VA UPS with LED Status Display provides power protection and battery backup for office computer systems. The UPS provides surge protection and battery backup via 4 outlets. It yields an average output power capacity of 420VAC at 260 watts and the battery lasts up to 14 minutes at half-load capacity. The UPS also features RS-232 serial communication and RJ-45 data line protection. These features make the Smart-UPS SC an excellent choice to provide power and battery backup for your office PC.

American Power Conversion (APC) APC Smart-UPS 420VA UPS Features

  • Boost and Trim Automatic Voltage Regulation (AVR): Gives higher application availability by correcting low and high voltage conditions without using the battery
  • Intelligent Battery Management: Maximizes battery performance, life and reliability through intelligent, precision charging
  • Power Conditioning: Protects connected loads from surges, spikes, lightning and other power disturbances
  • Temperature-Compensated Battery Charging: Prolongs battery life by regulating the charge voltage according to battery temperature
  • Automatic Restart After UPS Shutdown: Automatically starts up the connected equipment upon the return of utility power
  • Automatic Self-Test: Periodic battery self-test ensures early detection of a battery that needs to be replaced
  • Disconnected Battery Notification: Warns when a battery is not available to provide backup power
  • Network manageable: Provides remote management of the UPS over the network
  • Audible alarms: Actively let you know if the unit is on battery, if the battery is low or if there is an overload condition
  • LED status indicators: Quickly understand unit and power status with visual indicators
  • Serial Connectivity: Provides management of the UPS via a serial port
  • USB connectivity: Provides management of the UPS via a USB port (not available on all models)
  • User-replaceable batteries: Increases availability by allowing a trained user to perform upgrades and replacements of the batteries reducing Mean Time to Repair (MTTR)
  • Hot-swappable batteries: Ensures clean, uninterrupted power to protected equipment while batteries are being replaced
  • Predictive failure notification: Provides early-warning fault analysis ensuring proactive component replacement
  • Resettable circuit breakers: Enables a quick recovery from overload events
  • Battery failure notification: provides early-warning fault analysis on batteries enabling timely preventive maintenance
  • Adjustable voltage-transfer points: Maximizes useful battery life by widening the input voltage window or tightening the output voltage regulation
  • Adjustable voltage sensitivity: Provides the ability to adapt the UPS for optimal performance in specific power environments or generator applications
  • Safety-agency approved: Ensures the product has been tested and approved to work safely with the connected service provider equipment and within the specified environment

American Power Conversion (APC) APC Smart-UPS 420VA UPS Specifications

Output: Output Power Capacity
260 Watts / 420 VA
Output: Max Configurable Power
260 Watts / 420 VA
Output: Nominal Output Voltage
Output: Output Voltage Distortion
Less than 5% at Full Load
Output: Output Frequency (sync to mains)
47 - 53 Hz for 50 Hz Nominal, 57 - 63 Hz for 60 Hz Nominal
Output: Topology
Line Interactive
Output: Waveform Type
Stepped Approximation to a Sinewave
Output: Output Connections
(4) NEMA 5-15R
Input: Nominal Input Voltage
Input: Input Frequency
50/60 Hz +/- 3 Hz (auto sensing)
Input: Input Connections
NEMA 5-15P
Input: Cord Length
6 feet (1,83 meters)
Input: Input Voltage
82 - 144V (Range for Main Operations)
Input: Input Voltage Adjustable Range
75 - 154V (for Mains Operation)
Battery Type
Maintenance-Free Sealed Lead-Acid Battery with Suspended Electrolyte: Leakproof
Typical recharge time
5 hour(s)
Replacement Battery
RBC Quantity
Interface Port(s)
DB-9 RS-232
Control Panel
LED Status Display With On Line: On Battery: Replace Battery and Overload Indicators
Audible Alarm
Alarm When On Battery: Distinctive Low Battery Alarm: Overload Continuous Tone Alarm
Surge Energy Rating
412 Joules
Full Time Multi-Pole Noise Filtering: 0.7% IEEE Surge Let-Through: Zero Clamping Response Time: Meets UL 1449
Data Line Protection
RJ-45 Modem/Fax/DSL/10-100 Base-T Protection
Operating Environment
32 - 104 deg.F / 0 - 40 deg.C
Operating Relative Humidity
0 - 95%
Operating Elevation
0-10000' / 0-3048m
Storage Temperature
5 - 113 deg.F / -15 - 45 deg.C
Storage Relative Humidity
0 - 95%
Storage Elevation
0-50000' / 0-15240m
Audible Noise
45.00 dBA (at 1 Meter From Surface Of Unit)
Online Thermal Dissipation
50.00 BTU/hr
Regulatory Approvals
CSA, FCC Part 15 Class A, UL 1778
Dimensions (HxWxD)
6.60x4.70x14.50" / 167.6x119.38x368.3mm
22 lbs / 9.97 kg

American Power Conversion (APC) APC Smart-UPS 420VA UPS Reviews

Reviewed by 3 customers


A Life Saver


from Charlotte NC Area

A little tricky to connect the battery the first time, but well worth the effort. I have my computer, monitor, and printer connected. Several times I have had brief power failures and my Smart-UPS kicked in smoothly and saved all my work. Well worth the investment in peace of mind and saved work.


Read all specs before buying


from Undisclosed

The UPS is working fine and was plug and play. The serial interface was unexpected and worthless. The last 6 APC UPS I have purchased over the years always came with a USB connection. Not this one, my server does not have a serial connection.


Arrived Quickly


from Oakland, MD

Pleased at the quick turnaround time and the ease of sending tradeup unit back

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