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APC Back-UPS CS 350
APC Back-UPS CS, 350VA/210W, Input 120V/Output 120V, Interface Port DB-9 RS-232, USB

APC Back-UPS CS 350

Includes: CD with software, Cord Management Straps, USB cable, User Manual
APC PC Workstation UPS
APC Back-UPS CS, 350VA/210W
Our Price: $89.00

More pricing below, click here!


Key Features:

  • Serial Connectivity
  • USB connectivity

The re-invention of the most relied upon desktop UPS in history: the Back-UPS!

The Back-UPS CS offers our best value for protecting your business and office computer systems. It provides battery backup power that allows you to work through short and medium length power outages. It also safeguards your equipment from damaging surges and spikes that travel along your utility and phone lines. Award-winning shutdown software automatically powers down your computer system in the event of an extended power outage. Additional features like Audible alarms, LED status indicators, user replaceable battery, push-button circuit breakers and Transformer-block spaced outlets make the Back-UPS CS the perfect unit to protect your business' productivity from the constant threat of power outages and lost data.

APC Back-UPS CS 350

Features & Benefits:

Battery-protected and surge-only outlets Reserves power capacity and run time for connected equipment that require battery back-up while providing surge only protection for less critical equipment
Power conditioning Protects connected loads from surges, spikes, lightning, and other power disturbances.
Dataline Surge Protection Provides protection of connected equipment from power surges on the data lines.
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. UL, FCC, CE, C-Tick approvals.
Audible alarms Provides notification of changing utility power and UPS conditions.
Automatic restart of loads 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.
Battery replacement without tools Provides reduced risk of load disruption by allowing quick and easy battery replacement.
LED status indicators Quickly understand UPS status with indicators.
Hot-swappable batteries Ensures clean, uninterrupted power to protected equipment while batteries are being replaced
Resettable circuit breakers Enables quick recovery from UPS overload events.
Transformer-block spaced outlets Protect equipment with input transformer blocks without blocking access to other receptacles.
User-replaceable batteries Increases availability by allowing a trained user to perform upgrades and replacements of the batteries reducing Mean Time to Repair (MTTR)

Runtime Chart:

Watts 50 100 200 300 400 500 600 700 800 Full Half
VA~ 80 160 320 480 640 800 960 1120 1280 Load Load
BK350 47 min 19 min 5 min - - - - - - 5 min (210 Watts) 18 min (105 Watts)
BK500 1 hrs 2 mins 26 min 8 min 2 min - - - - - 2 min (300 Watts) 14 min (150 Watts)
BK500BLK 1 hrs 2 mins 26 min 8 min 2 min - - - - - 2 min (300 Watts) 14 min (150 Watts)

Technical Specifications:

Output Power Capacity 210 Watts / 350 VA
Max Configurable Power 210 Watts / 350 VA
Nominal Output Voltage 120V
Waveform Type Stepped approximation to a sinewave
Output Connections NEMA 5-15R(3) NEMA 5-15R (Battery Backup)

NEMA 5-15R(3) NEMA 5-15R (Surge Protection)
Nominal Input Voltage 120V
Input Frequency 50/60 Hz +/- 3 Hz (auto sensing)
Input Connections NEMA 5-15PNEMA 5-15P
Cord Length 6 feet (1.83 meters)
Input voltage range for main operations 98 - 140V
Batteries & Runtime
Battery Type Maintenance-free sealed Lead-Acid battery with suspended electrolyte: leakproof
Typical recharge time 8 hour(s)
Replacement battery cartridge RBC2
RBC™ Quantity 1
Typical Backup Time at Half Load 18.1 minutes (105 Watts)
Typical Backup Time at Full Load 4.7 minutes (210 Watts)
Runtime Chart Back-UPS CS
Communications & Management
Interface Port(s) DB-9 RS-232,USB
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 Protection and Filtering
Surge Energy Rating 1020 Joules
Filtering Full time multi-pole noise filtering : 5% IEEE surge let-through : zero clamping response time : meets UL 1449
Dataline Protection RJ-11 Modem/Fax/DSL protection (two wire single line)
Maximum Height 6.50 inches (165 mm)
Maximum Width 3.60 inches (91 mm)
Maximum Depth 11.20 inches (284 mm)
Net Weight 12.50 lbs. (5.68 kg)
Shipping Weight 14.00 lbs. (6.36 kg)
Shipping Height 10.35 inches (263 mm)
Shipping Width 6.89 inches (175 mm)
Shipping Depth 14.06 inches (357 mm)
Master Carton Units 2.00
Master Carton Weight 29.00 lbs.
Color Beige
SCC Codes 1073130401629 5
Units per Pallet 80.00
Operating Environment 32 - 104°F (0 - 40°C)
Operating Relative Humidity 0 - 95%
Operating Elevation 0-10000 feet (0-3000 meters)
Storage Temperature 5 - 113°F (-15 - 45°C)
Storage Relative Humidity 0 - 95%
Storage Elevation 0-50000 feet (0-15000 meters)
Audible noise at 1 meter from surface of unit 45.00 dBA
Online Thermal Dissipation 20.00 BTU/hr
Regulatory Approvals FCC Part 68,TUV
Standard Warranty 3 years repair or replace
Equipment protection policy Lifetime: $100,000
**The time to recharge to 90% of full battery capacity following a discharge to shutdown using a load rated for 1/2 the full load rating of the UPS.


Download the APC BK350 Data Sheet (PDF).

Pricing Notes:

APC PC Workstation UPS
APC Back-UPS CS, 350VA/210W
Our Price: $89.00
Simple Signaling UPS Cable - USB to RJ45
Our Price: $34.00
APC NetBotz USB Latching Repeater Cable, LSZH - 5m
Our Price: $69.00
APC NetBotz USB Latching Repeater Cable, Plenum - 5m
Our Price: $99.00
APC NetBotz USB Latching Cable, LSZH - 5m
Our Price: $44.00
APC NetBotz USB Latching Cable, Plenum - 5m
Our Price: $59.00
Extended Warranty & Service Agreements
Please Note: Extended Warranties must be purchased before the termination date of the original factory warranty, Extended Warranties are non transferable. Some aspects of the service definition presented on this web site may vary by location. In the case of a conflict between the service definitions contained on this site and the local service definitions the local service definitions will prevail. For more information, please visit our services page.
Service Pack 1 Year Extended Warranty (for concurrent sales)
Our Price: $39.00
Service Pack 3 Year Extended Warranty (for concurrent sales)
Our Price: $79.00
1 Year Extended Warranty (Renewal or High Volume)
Our Price: $44.00
3 Year Extended Warranty (Renewal or High Volume)
Our Price: $89.00