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Black rectangular UPS unit with six NEMA 5-15 outlets and LED indicators

APC

APC BK500BLK UPS 500 VA 300 W 120 V 6 Outlets

SKU CH-C9ZF-X3202 MPN BK500BLK

Provides 300 W battery backup and 480 J surge protection across six outlets with USB and phone-line interfaces

  • Voltage version120 V
  • AC input voltage98–140 V
  • Input line frequency50/60 Hz +/- 3 Hz (auto sensing)
  • Power inputNEMA 5-15P
  • Volt-ampere rating500 VA
  • Power rating300 W

VA 500 VA

  • Battery backup keeps systems running for 15 minutes at half load
  • 300 watts of continuous power supports desktop PC and monitor
  • 480 joules surge protection shields equipment from voltage spikes
  • USB and RS-232 ports enable automatic shutdown via management software
  • Data-line protection guards modem, fax or DSL connection through RJ-11 port

Compact standby UPS

The APC BK500BLK is a 500 VA standby battery backup with six NEMA 5-15R outlets. Three outlets provide battery-backed power and surge protection, while the remaining three deliver surge protection only. It accepts 98 to 140 V input and supplies 120 V output through a NEMA 5-15P plug. A sealed lead-acid battery recharges in eight hours and is user-replaceable with RBC2 or RBC2J packs.

Desktop and networking protection

This unit suits home-office PCs, routers, modems and phone-line equipment needing brief ride-through during outages. Data-line protection covers analog phone, fax, modem or DSL connections via an RJ-11 port. USB and DB-9 RS-232 interfaces enable monitoring and graceful shutdown software. Equipment requiring continuous pure sine-wave output or longer runtime at full load should look at other topologies.

300 watt output limit

The UPS delivers a maximum of 300 watts on its battery-backed outlets. Add the power draw of every device you plan to connect to those three outlets; if the total exceeds 300 W the unit will overload and alarm. The half-load runtime is 15 minutes and full-load runtime is 3 minutes, so plan loads accordingly.

How it compares

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

Price $111.99
Cheaper than about 90% of the 1,153 comparable items (median $948.99).

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Specifications

Product
Brand nameAPC
Product lineBack-UPS
Model nameBK500BLK
Ports & slots
Communication portsDB-9 RS-232, USB
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)
Power inputNEMA 5-15P
Volt-ampere rating500 VA
Power rating300 W
Voltage output120 V
AC output frequency50/60 Hz +/- 3 Hz
Power outlets6
Battery typeSealed Lead Acid
Battery charge time8 hour(s)
Replacement batteryRBC2, RBC2J
AlertsAlarm when on battery : distinctive low battery alarm : overload continuous tone alarm
Surge protection rating480 Joules
Size & build
Product dimensions6.5 in × 3.58 in × 11.18 in (H × W × D)
Product weight13.82 lb (6.27 kg)
Shipping weight6.53 kg
Package size358 × 251 × 183 mm

Other versions of this model

1 more in the same range

Questions about this item

How much desk or floor space does the 4-inch-wide by 11-inch-deep unit need?

The UPS measures 4 inches wide by 11 inches deep by 7 inches high, so allow at least that footprint plus a few inches of clearance for the 6-foot cord and ventilation.

Which outlets should I plug my computer and monitor into, and what does the USB cable do?

Connect critical devices to the three NEMA 5-15R outlets marked Battery Backup; use the other three for surge-only loads. The USB link lets the PC monitor battery status and trigger a graceful shutdown.

When and how do I swap the sealed lead-acid battery?

Replace the user-replaceable RBC2 or RBC2J cartridge when runtime drops noticeably — typically after 3 to 5 years. Power off, unplug, open the battery door, disconnect the old pack, insert the new one, and recharge for eight hours.

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