COTS Heavy Industrial Inverters for Harsh and Hazardous Conditions

Hopkinton, MA – Schaefer Inc. unveils our new MIL-K Series of MIL-COTS Inverters for extreme applications. Our robust and ruggedized design allows for high performance, superb reliability and build to order flexibility. The MIL-K Series is the ideal source for use in Mission Critical,  shelters, vehicles, avionics, radar, and many other open air applications.

These highly efficient (93%) 3-level technology (from our COTS/Heavy Industrial 30KW Liquid Cooled Active Harmonic Filters), COTS inverters offer 360Vdc to 750Vdc (600Vdc nominal) input voltage and 208Vac/120Vac three phase (30KW/37.5KVA) 60Hz output voltages. Series options include low and high IP rated (IP69), liquid (up to 65ºC) and air cooled, isolated and non-isolated, ac and dc inputs, parallel (N+1), hight output power and more.
Specific units are design to meet the following Mil Standards: Mil-Std-461 (CE, CS, RE, and RS),Mil-Std-1399-300A/B, Mil-Std-1332B, Mil-Std-704, Mil-Std-1275, Mil-Std-810, Mil-Std-901, Mil-Std-167, Mil-Std-202, Mil-Std-740. MIL-K Series also meet CAN (J1939), UL 60950 and UL 1950 CSA, CE Standards.

Schaefer offers a number of options and can optimize or customize for mission and non-mission critical applications. Full product specifications can be viewed at For further information and pricing, please contact Schaefer, Inc., 45 South Street, Hopkinton, MA 01748. Tel: 508/435-6400 for additional information, Email: