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Compact rectangular UPS unit in matte black with six NEMA outlets and USB port

APC

APC BK350 Back-UPS CS 350VA 210W 120V UPS

SKU CH-HBMF-HMC66 MPN BK350

Standby UPS delivers 350 VA and 210 W to six NEMA 5-15R outlets, three with battery backup, plus USB and RS-232 management ports

  • Voltage version120 V
  • AC input voltage98–140 V
  • Input line frequency50/60 Hz +/- 3 Hz (auto sensing)
  • Volt-ampere rating350 VA
  • Power rating210 W
  • Voltage output120 V

VA 350 VA

  • 350VA / 210W protects desktop and router during outages
  • Six NEMA 5-15R outlets split between battery backup and surge-only
  • USB and RS-232 ports enable automatic shutdown via software
  • 120V standby topology with 98–140V input range handles brownouts
  • User-replaceable RBC2 battery restores full runtime in eight hours

Standby UPS for 120V Home Office

The APC BK350 Back-UPS CS provides 350VA and 210W of battery backup through a standby topology. It accepts an input range of 98-140V at 50/60Hz and delivers 120V output to six NEMA 5-15R outlets. Three outlets supply battery backup and surge protection while the remaining three provide surge protection only. A sealed lead-acid battery recharges in 8 hours and uses the RBC2 replacement cartridge.

Desktop Users Needing Basic Power Protection

This unit suits desktop PCs, networking gear and peripherals that require short-term runtime during outages and protection from voltage spikes. It includes USB and RS-232 management ports plus RJ-11 data line protection for phone, fax, modem or DSL connections. Management software is supplied on CD for automated shutdown configuration. It is not for equipment requiring pure sine-wave output, for loads above 210W, for environments outside 120V nominal, or for applications needing extended runtime or network management cards.

210W Continuous Power Limit

The single specification that decides fit is the 210W maximum output capacity. Add the power draw of every device you plan to connect to the battery-backup outlets; if the total exceeds 210W the UPS will overload and cannot support the load. The surge-only outlets do not increase this limit. Verify your equipment's wattage against this figure before purchase.

How it compares

Measured against everything we stock in Uninterruptible Power Supplies (UPS), at today’s prices. Recalculated every night.

Price $90.99
Cheaper than about 92% of the 1,153 comparable items (median $948.99).

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Specifications

Product
Brand nameAPC
Product lineBack-UPS
Model nameBK350
Ports & slots
Communication portsUSB
Protected data linesAnalog phone line for phone/fax/modem/DSL (RJ-11 connector)
Power
Voltage version120 V
AC input voltage98–140 V
Input line frequency50/60 Hz +/- 3 Hz (auto sensing)
Volt-ampere rating350 VA
Power rating210 W
Voltage output120 V
AC output frequency50/60 Hz +/- 3 Hz
Power outlets6
Battery typeSealed Lead Acid
Battery charge time8 hour(s)
Replacement batteryRBC2
AlertsAlarm when on battery : distinctive low battery alarm : overload continuous tone alarm
Surge protection rating1020J
Size & build
Product dimensions6.5 in × 11.2 in × 3.6 in (H × W × D)
Product weight12.5 lb (5.67 kg)
Shipping weight5.60 kg
Package size358 × 236 × 178 mm
In the box
In the boxBK350 UPS, CD with software, Cord management straps, USB cable, User Manual
Environment & compliance
Regulatory approvalsCalifornia (CEC) Battery Charger, ENERGY STAR (USA), FCC Part 68, TUV
Software
Control softwareYES

Other versions of this model

1 more in the same range

Questions about this item

How do I confirm the BK350 is protecting my equipment after I plug it in?

The unit sounds a distinctive low-battery alarm when running on battery and a continuous tone if overloaded; the USB port and included software also report status to your computer.

What comes with the BK350 and what must I purchase separately?

The box includes the UPS, a USB cable, cord-management straps, a software CD and the user manual; the replaceable RBC2 battery is sold separately when the original reaches end of life.

Which BK350 capacity suits a typical desktop and monitor?

The 350 VA / 210 W rating supports a modest desktop and monitor; add the wattages of every device you plan to connect and ensure the total stays below 210 W.

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