Tripp Lite
1111 W. 35th Street
Chicago, IL 60609
1 773.869.1774
1 773.869.1329

18kVA 18kW 4U Step-Down Isolation Transformer - Converts 208/240V 60Hz (Source) to 120/240V split phase (Load)

Model Number: SU20KXFMRT4U

  • 18kVA / 18kW / 18,000 watt step-down isolation transformer converts 208 or 240V 60Hz to 120/240V split phase output
  • Supports hardwire input and output
  • Ideal means of converting UPS, utility, generator or other 208/240V input to 120/240V split phase
  • Supports 4U rackmount installation
  • 2-year limited warranty

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Tripp Lite's SU20KXFMRT4U step-down, isolation transformer converts 208 or 240V input from any 60Hz generator, utility or UPS high voltage source to 240/120V output. 208 or 240V hardwire input connection and hardwire 240/120V output. Supports 4U rackmount installation in 4 post racks with included brackets. Supports upright tower installation with 2-9USTAND.


  • Step-down/isolation transformer converts 60Hz high voltage 208 or 240V input from generator, utility or UPS to 120/240V split phase output
  • 18kW watt power handling capacity with 240V input (output de-rates to 16kW with 208V input)
  • Hardwire input and output connections
  • Included mounting accessories support 4U installation in 4 post rack enclosures

Package Includes

  • SU20KXFMRT4U step-down, isolation transformer
  • 4 post rackmount accessories
  • Owner's manual with warranty information
RoHS compliant VMware ready application


UPC Code037332176608
Frequency Compatibility60 Hz
Output (VA)18000
Output (Watts)18000
Output Capacity DetailsOutput capacity with 240V input is 18kVA / 18kW / 18,000 watts; Output capacity de-rates to 16kVA / 16kW / 16,000 watts with 208V input
Output Nominal Voltage120, 240V AC
Nominal Input Voltage(s) Supported208V AC; 240V AC
Maximum Input Amps77
Input Connection TypeHardwire
Voltage Compatibility (VAC)208; 240
Form Factors SupportedRack/Tower (2U)
Material of ConstructionSteel
Shipping Dimensions (hwd / in.)12.50 x 23.00 x 34.50
Shipping Weight (lbs.)320.00
Unit Dimensions (hwd / in.)7 x 17.5 x 29.32
Unit Weight (lbs.)281.09
Relative Humidity0-95% (non-condensing)
CertificationsTested to UL1778, CSA, RoHS
Product Warranty Period (Worldwide)2-year limited warranty

Extended Warranties

Part Number Description
WEXT1S 1-Year Extended Warranty - For select Tripp Lite Products
WEXT2S 2-Year Extended Warranty - For select Tripp Lite Products
WEXT3S 3-Year Extended Warranty - For select Tripp Lite Products
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Mon - Fri 8 AM - 5:30 PM CST
(773) 869-1774

Mon - Fri: 8 AM - 5:30 PM CST
(773) 869-1234

Tripp Lite
1111 West 35th Street
Chicago, Illinois 60609
United States

1 773.869.1111 Main
1 773.869.1329 Fax

Business Hours
8 AM - 5:30 PM CST

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Need help with your purchase?
We're always available to help with questions, including product selection, sizing, installation and product customization. Call us at 1 773.869.1774 or email