About this UPS
- Brand: Tripp Lite
- Product Type: Dual Conversion Online UPS
- Manufacturer Part Number: SU40K
- Input Voltage: 120 V AC,208 V AC
- Form Factor: Tower
- Plug/Connector Type: Hard Wire 4-wire
- Product Family: SmartOnline
- Backup/Run Time (Half Load): 13 Minute
- Backup/Run Time (Full Load): 5.50 Minute
- Load Capacity: 40 kVA
Marketing Information:
Tripp Lite's SU40K (40kVA) SmartOnline Modular 3-Phase Intelligent, True On-Line UPS System provides 100% system availability with N+1 modular architecture and 1+1 parallel capability. In an N+1 configuration, the SU40K provides two self-contained, redundant 20kVA power modules that can be hot-swapped (with the load powered) if maintenance is required. Connect two SU40K models in parallel (1+1 configuration) to provide fail-safe redundancy (two 40kVA models supporting a 40kVA load) or to increase capacity (two 40kVA models supporting an 80kVA load).The SU40K provides mission-critical equipment with the highest level of power protection available. Large capacity 40,000VA/32,000W UPS continually converts incoming AC power into filtered DC power, and then resynthesizes it back into AC power with a pure sine wave. Perfectly regulated, continuous sine wave output with zero transfer time assures compatibility with all equipment types. The SU40K's high input power factor, advanced IGBT inverter technology and Digital Signal Processor (DSP) technology produce less than 3% input Total Harmonic Distortion (THDi). With low THDi, generators run cooler and last longer, allowing managers to save installation costs by installing a generator with a capacity equal to the equipment load (1:1 ratio). Extremely efficient operation (up to 96%) saves money by lowerin
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Plug/Connector Type: Hard Wire 4-wireReceptacle Type: Hard Wire 4-wirePhase: Three PhaseLoad Capacity: 40 kVAInput Voltage:
- 120 V AC
- 208 V AC
- 120 V AC
- 208 V AC
- SmartOnline SU40K 40kVA Tower UPS
- SU40K UPS System
- PowerAlert Software and cabling
- Parallel cable (for 1+1 operation)
- Instruction manual and startup checklist
- Warranty information
Technical specifications
How long it'll keep your equipment up.
Manufacturer-specified runtime at typical loads. Real-world figures depend on battery age, ambient temperature, and load profile.
Need more runtime? This UPS accepts external battery packs (XBPs). Contact us about XBP options →
Estimate based on manufacturer-specified runtime curve. Real-world runtime varies with battery age, ambient temperature, and load profile.
Compatible accessories
Network management cards, rail kits, environmental sensors — verified compatible with this UPS line.
Before you order
How do I know this UPS will run my equipment?
Add up the wattage draw of every device you'll plug in (servers, switches, monitors). The UPS's wattage rating — not VA — is the number that matters. Aim for the UPS to run at 60–70% of capacity at full load: this gives headroom for inrush current and a meaningful runtime margin. Email us your equipment list and we'll size the right UPS within one business hour.
What's covered by the warranty, and how long does it last?
New units carry the full manufacturer warranty registered to you on receipt. The manufacturer handles claims directly via their North American support channel. Refurbished units are covered by our own 1-year UPSPLUSBATTERY warranty handled in-house in Canada.
Can I extend runtime beyond what's shown above?
Many Smart-UPS-class models accept an external battery pack (XBP) connected to the rear battery port. If this UPS shows "Extended Runtime Capable: Yes" in the spec grid above, an XBP is supported. Compatible XBPs and the runtime gain they deliver vary by model — contact us if you don't see the right XBP in our catalogue.

