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Compact black rectangular UPS unit with eight front outlets and serial port

Tripp Lite

Tripp Lite INTERNET550SER 550VA 300W UPS

SKU CH-K6XB-2ARMN MPN INTERNET550SER

Ultra-compact 550VA standby UPS provides battery backup for four outlets and surge protection for four more, with DB9 serial monitoring and Tel/DSL line protection

  • Volt-ampere rating550 VA
  • Power rating300 W
  • Voltage output120Vac +/- 5%
  • Power outlets8
  • Power outletsNEMA 5-15R
  • Battery typeValve Regulated Lead Acid (VRLA)
  • 550 VA / 300 W capacity keeps systems running during outages
  • 5 minutes runtime at full load protects work long enough to save and shut down
  • 4 battery-backed outlets plus 4 surge-only outlets secure critical and peripheral devices
  • DB9 serial port enables monitoring and unattended shutdown
  • 252-joule surge rating and Tel/DSL protection defend against power spikes on AC and phone lines

Ultra-compact standby UPS

The Tripp Lite INTERNET550SER is a 550 VA standby UPS designed for PCs, network workstations and systems that rely on a contact-closure serial interface for monitoring and unattended shutdown. It provides battery-derived AC output during blackouts and severe brownouts starting at 99 V. Eight NEMA 5-15R outlets are split between four battery-supported and four surge-only connections.

Sustained load behaviour

At full load of 550 VA the internal valve-regulated lead-acid battery delivers 3.5 minutes of runtime. At half load of 275 VA the runtime extends to 10 minutes. The unit recharges to 90 percent capacity in 2 to 4 hours. An audible alarm signals when battery backup operation is active.

What it replaces and when to upgrade

This UPS replaces basic surge strips that lack battery backup and serial monitoring for automated shutdown. The jump is worthwhile when protecting equipment that requires graceful shutdown during outages or when telephone and DSL lines need 252-joule surge protection. It is not suited for loads exceeding 300 watts or for installations requiring longer runtime than the rated figures provide.

How it compares

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

Price $77.99
Cheaper than about 93% of the 1,153 comparable items (median $948.99).

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Specifications

Product
Brand nameTRIPP LITE
Model nameINTERNET550SER
Ports & slots
Communication portsDB9
Protected data linesTel/DSL
Power
Volt-ampere rating550 VA
Power rating300 W
Voltage output120Vac +/- 5%
Power outlets8
Battery typeValve Regulated Lead Acid (VRLA)
Runtime on batteryFull load runtime: 3.5 minutes (550 VA)
Half load runtime: 10 minutes (275 VA)
Battery charge time2-4 h to 90%
AlertsAudible alarm indicates battery backup operation
Surge protection rating252 joules
Size & build
Product dimensions3.1 in × 5.7 in × 10.9 in
Product weight6.5 lb (2.95 kg)
Shipping weight2.38 kg
Package size330 × 203 × 108 mm
Environment & compliance
Regulatory approvalsTested to UL1778 (USA), CSA C22.2 No. 107.3 (Canada), Class B (Emissions), NOM (Mexico), FCC Part 68 / Industry Canada (telecommunications), RoHS Compliant
Software
Control softwareYES

Questions about this item

Does the audible alarm sound continuously while the UPS runs on battery?

The audible alarm indicates battery backup operation so you will hear it whenever the unit supplies power from its internal battery.

Which devices need a NEMA 5-15P plug to connect to the eight rear outlets?

Any equipment with a standard NEMA 5-15P plug can use the eight NEMA 5-15R outlets; four provide battery backup and four provide surge-only protection.

Will the DB9 serial port work with a legacy server that only supports contact-closure monitoring?

Yes, the built-in DB9 serial port is designed for contact-closure monitoring and unattended shutdown on older systems that rely on that interface.

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