Cyber Power - ST425 - Standby UPS System, 425VA/260W
Product Overview
The CyberPower ST425 is a space-efficient standby UPS offering 425 VA / 260 W capacity with a simulated sine wave output. It features a total of eight outlets: four dedicated to battery backup and surge protection, and four for surge-only defense. Utilizing a GreenPower UPS high-efficiency design, this ENERGY STAR qualified unit includes a 5ft power cord and 890 joules of surge suppression. For a versatile setup, it includes keyhole mounting slots and is protected by a three-year warranty and a $75,000 Connected Equipment Guarantee.
Configuration
- • UPS topology: Standby; capacity: 425 VA / 260 W
- • Outlets: 8 × NEMA 5-15R (4 battery & surge protected, 4 surge-only); 4 widely spaced outlets
- • Input: NEMA 5-15P plug, 5ft cord; voltage range 96-140 VAC; frequency 47-63 Hz
- • Battery: 1 × 12V/2.9Ah sealed lead-acid (field replaceable); runtime: 6 min (half load), 1.5 min (full load); recharge time: 8 hours
- • Physical: dimensions: 8.3" × 4.5" × 3.2" (W×H×D); weight: 3.8 lbs; keyhole mounting slots (2 × 2-direction slots)
Features
ST425 utilizes a simulated sine wave output with a typical 8ms transfer time to maintain power during outages. It integrates 890 joules of surge suppression and EMI/RFI filtration to ensure clean electricity, while transformer-spaced outlets prevent bulky adapters from obstructing nearby ports. The GreenPower UPS design and 7A circuit breaker offer high-efficiency operation with reliable internal overload protection.
Technical Context
This UPS is certified to UL1778 and FCC Class B standards. It functions reliably in environments up to 95% humidity and features distinct audible alarms for low battery or fault conditions. Your investment is secured by a three-year warranty and a $75,000 Connected Equipment Guarantee, ensuring long-term peace of mind for residential electronics.
Installation Notes
This lightweight 3.8 lb unit features an ultra-compact footprint, measuring just 8.3" wide, making it perfect for tight spaces behind entertainment centers. For flexible mounting, it includes dual-direction keyhole slots for secure wall installation. The design is optimized for desktop or wall placement, providing immediate power status via a dedicated LED indicator.
| GENERAL | |
| UPS Topology | Standby |
| Energy Saving | Yes |
| ENERGY STAR® Qualified | Yes |
| INPUT | |
| Voltage | 96 – 140 VAC |
| Frequency Range | 47 – 63 Hz |
| Circuit Breaker | 7 A |
| Plug Type | NEMA 5-15P |
| Cord Length | 5 ft |
| OUTPUT | |
| VA | 425 VA |
| Watts | 260 W |
| On Battery Voltage | 120 VAC ± 5% |
| On Battery Frequency | 50/60 Hz ± 1% |
| On Battery Waveform | Simulated Sine Wave |
| OUTPUT CONT. | |
| Outlet Type | NEMA 5-15R |
| Outlets – Total | 8 |
| Outlets - Battery & Surge Protected | 4 |
| Outlets - Surge-Only Protect | 4 |
| Outlets - Widely Spaced | 4 |
| Overload Protection | Internal Circuitry Limiting Circuit Breaker |
| Transfer Time | 8 ms Typical |
| BATTERY | |
| Runtime at Half Load (min) | 6 |
| Runtime at Full Load (min) | 1.5 |
| Battery Type | Sealed Lead-Acid |
| Battery Size | 12V/2.9Ah |
| Battery Quantity | 1 |
| User Replaceable | Field Replacement |
| BATTERY CONT. | |
| Typical Recharge Time | 8 hours |
| SURGE PROTECTION & FILTERING | |
| Surge Suppression | 890 |
| EMI/RFI Filtration | Yes |
| MANAGEMENT & COMMUNICATIONS | |
| LED Indicators | Power On |
| Audible Alarms | On Battery, Low Battery, Overload, Fault |
| PHYSICAL | |
| Keyhole Mounting Slots | Yes, 2 x 2-direction slots |
| Dimensions W×H×D (in) | 8.3 x 4.5 x 3.2 |
| Weight (lbs) | 3.8 |
| ENVIRONMENTAL | |
| Operating Humidity | 0 – 95% (non-condensing) |
| Operating Temperature | 32 – 104 °F (0 – 40 °C) |
| CERTIFICATIONS | |
| Safety | UL1778, cUL, FCC DOC Class B, CEC |
| Environmental | RoHS Compliant |
| WARRANTY | |
| Product Warranty | Three-Year Limited |
| Connected Equipment Guarantee | Lifetime |
| CEG Amount | $75,000 |
