TECHNICAL SPECIFICATIONS
Model
ST425
ST625U
ST900U
Capacity
425VA / 260W
625VA / 360W
900VA / 500W
Nominal Input Voltage
120 Vac
Input Frequency
50/60 Hz ± 3 Hz
On-Battery Output Voltage
120Vac ± 5%
On-Battery Output Frequency
50Hz/60Hz ± 1% (auto-sensing)
Max. Load for UPS Outlets
425VA / 260W
625VA / 360W
900VA / 500W
Max. Load for Full-Time Surge
Protection outlets
7 Amps
12 Amps
12 Amps
On-Battery Output Wave Form
Simulated Sine Wave
Operating Temperature
+ 32°F to 104°F / 0°C to 40°C
Operating Relative Humidity
0 to 95% non-condensing
Size (W x H x D)
8.3” x 4.5” x 3.2”
210 x 115 x 81 mm
9.8” x 5.8” x 3.2”
250 x 147 x 82 mm
12.2” x 7” x 3.1”
310 x 178 x 80 mm
Net Weight (lbs / kg)
3.79 lbs / 1.72 kg
6.48 lbs / 2.94 kg
8.70 lbs / 3.95 kg
Typical Battery Recharge Time
8 hours typical from total discharge
Typical Battery Life
3 to 6 years, depending on number of discharge/recharge cycles
Recommended Battery
Sealed Maintenance Free Lead Acid Battery
Safety Approvals
UL1778(UPS), cUL CSA C22.2 No. 107.3-05, FCC/DoC Class B